Nutrient Removal with Membrane Bioreactor Technology by cometjunkie43

VIEWS: 118 PAGES: 21

									Nutrient Removal with Membrane
Bioreactor Technology
POTW Nutrient Reduction and Efficiency Workshop,
Covington KY




                              Jeff Peeters, P.Eng.
                 GE Water & Process Technologies




Outline

1. ZeeWeed membrane
2. Membrane bioreactor technology
3. MBR design for nutrient removal
4. Case studies
5. Summary


                                                                   2/
                                         GE WEFTEC.08 Workshop W102 /
                                                           10/18/2008




ZeeWeed membrane




                                                                        1
 Revolutionary Membrane Technology
First introduced immersed
hollow fiber (HF) membrane
bioreactor technology in 1990
Hollow strands of porous
plastic fibers with billions of
microscopic pores on the
surface
UF and MF pores form a
physical barrier to impurities
but allow pure water                                                        Membrane
                                                                                                     Module
molecules to pass                                                             Fiber


Clean water is collected
inside of the hollow fiber
                                             Membrane Surface                                                     4/
                                                                                        GE WEFTEC.08 Workshop W102 /
                                                                                                          10/18/2008




Membrane Configurations
           Reverse Osmosis        Ultrafiltration                             Sand filtration

                 Nanofiltration                           Microfiltration




            0.0001       0.001       0.01           0.1                1           10           100um




 Reverse
 Osmosis
           Spiral wound/tubular:            Hollow fiber: best
           best suited to NF/RO             suited for MF/UF
                                                                                        Flat plate


                                  GE - ZENON membrane
                                          range                                                                   5/
                                                                                        GE WEFTEC.08 Workshop W102 /
                                                                                                          10/18/2008




              ZeeWeed® 500d – the Fiber
Reinforced hollow fiber
Ultrafiltration membrane
PVDF Chemistry
Oxidant resistant
   – 500,000 ppm-hr Cl2 life
Wide pH range
    – Filtration: 5 to 9.5 pH
    – Cleaning: 2 to 10.5 pH
Compatible with coagulants & PAC
NSF61 certified

                                                                                                                  6/
                                                                                        GE WEFTEC.08 Workshop W102 /
                                                                                                          10/18/2008




                                                                                                                       2
ZeeWeed® 500d – the Module




                       Fibers     Potting     Header

                     Modules are composed of
                     thousands of membrane fibers
                                                                        7/
                                              GE WEFTEC.08 Workshop W102 /
                                                                10/18/2008




ZeeWeed® Hollow Fiber Membrane




                                                                        8/
                                              GE WEFTEC.08 Workshop W102 /
                                                                10/18/2008




   ZeeWeed® 500d Flow Diagram




   Production Flow               Backpulse Flow
                                                                        9/
                                              GE WEFTEC.08 Workshop W102 /
                                                                10/18/2008




                                                                             3
                 ZeeWeed® 500d Train
                                 Air Separator
 Main Permeate
    Header                                Air Header

                                                 Permeate Header


Permeate Pump




                   ZeeWeed® Membrane
                       Cassettes


                                                                                    10 /
                                                           GE WEFTEC.08 Workshop W102 /
                                                                             10/18/2008




ZeeWeed® 500d Cassette Installation




                                                                                    11 /
                                                           GE WEFTEC.08 Workshop W102 /
                                                                             10/18/2008




ZeeWeed® 500d Process Train

                                                                         Air lines


                                                             Permeate pipe


                                                            Isolation valves


                                                       Membrane cassettes
                                                         immersed in tank


                                                                                    12 /
                                                           GE WEFTEC.08 Workshop W102 /
                                                                             10/18/2008




                                                                                           4
Membrane bioreactor technology




Membrane Bioreactor (MBR)



            Activated
                              MBR        Membrane
            Sludge
                                         Filtration
            Process




          Stable Biological           Absolute Solids
         Treatment Process              Separation
                                                                                 14 /
                                                        GE WEFTEC.08 Workshop W102 /
                                                                          10/18/2008




 Simplifying Wastewater Treatment




 • Replaces clarifiers and filters, and reduce bioreactor size
 • Combines physical barrier membrane with biological treatment
 • Produces high quality effluent at all times
                                                                                 15 /
                                                        GE WEFTEC.08 Workshop W102 /
                                                                          10/18/2008




                                                                                        5
              A Brief History of MBR
 Time                                          Event                                             Technology
Late 1960s    Dorr Oliver develops first MBR                                              Pressurized flat-sheet
Early 1970s   Thetford-Systems (ZENON) commercializes Cycle-Let® for water reuse in USA   Pressurized tubular membrane
Early 1980s   TechSep (Rhone-Poulenc) commercializes PLEIADE for water reuse in Japan     Pressurized flat-sheet
Mid 1980s     Nitto-Denko files a Japanese patent on a immersed MBR                       Immersed flat-sheet
              University of Tokyo experiments with hollow fibre MBR                       Immersed hollow fibre
Early 1990s   Kubota commercializes an MBR in Japan                                       Immersed flat-sheet
              Mitsubishi Rayon commercializes an MBR in Japan                             Immersed unsupported hollow fibres
              Zenon commercializes ZeeWeed® in North America and Europe                   Immersed reinforced hollow fibre
Early 2000s   USF commercializes Memjet                                                   Immersed unsupported hollow fibre
              Puron (Germany) introduces a copy of ZeeWeed®                               Immersed reinforced hollow fibre
              Kolon and Para (Korea) introduce copies of ZeeWeed®                         Immersed reinforced hollow fibre
              Toray introduces copy of Kubota module                                      Immersed flat-sheet
              Mitsubishi Rayon replaces their fine hollow fibre with a copy of ZeeWeed®   Immersed reinforced hollow fibre

•     First MBRs were pressurized tubular and flat-sheet modules

•     The development of immersed flat-sheet and hollow fibres started around the same time

•     Recently, copies started to appear: - one of Kubota’s flat-sheet
                                          - five of Zenon’s hollow fibre
                                                                                                                          16 /
                                                                                                 GE WEFTEC.08 Workshop W102 /
                                                                                                                   10/18/2008




Why MBR for nutrient removal?

Complete retention of particulate matter results in
consistent high-quality effluent
Maximum flexibility for nutrient removal process
configuration
Achievable effluent quality:
      TSS < 2 mg/L
      BOD < 2 mg/L
      NH3-N < 0.5 mg/L
      TN < 3 mg/L
      TP < 0.03 mg/L
      Turbidity < 0.2 NTU
                                                                                                                          17 /
                                                                                                 GE WEFTEC.08 Workshop W102 /
                                                                                                                   10/18/2008




      Smaller Footprint and Building


                                               TANK VOLUME


                               Conventional ASP                     ZW MBR Process
                                    100%                                 25%



              Features                                                Benefits
              • No Secondary Clarifiers                               • Large throughput
              • No Sand Filters                                       • Extra-compact footprint
              • Small Bioreactor                                      • Low sludge production
                                                                                                                          18 /
                                                                                                 GE WEFTEC.08 Workshop W102 /
                                                                                                                   10/18/2008




                                                                                                                                 6
           MBR Process Flow Diagram

                                                           Membrane
                                        Bioreactors        Filtration
           Fine     Grit
           Screen   Removal                                                    UV

Influent                                                                                Effluent




                                                                                                 19 /
                                                                        GE WEFTEC.08 Workshop W102 /
                                                                                          10/18/2008




 MBR System Overview
                                      Membrane Aeration
 Distribution
 Channel




    Bioreactor                                               Permeate Pumping
                              Mixed Liquor Recirculation

                                                                                                 20 /
                                                                        GE WEFTEC.08 Workshop W102 /
                                                                                          10/18/2008




  Proven MBR Solutions for
  Plants of All Sizes – Small to
  Large
   ZENON has the proven experience to
   deliver MBR plants of any size, from
   pre-engineered, quick delivery systems
   to the world’s largest operating plants.




< 10,000 GPD                                                                        >50 MGD


                                                                                                 21 /
                                                                        GE WEFTEC.08 Workshop W102 /
                                                                                          10/18/2008




                                                                                                        7
Simple, Modular ZeeWeed® Design




                                                     22 /
                            GE WEFTEC.08 Workshop W102 /
                                              10/18/2008




   Overall ZeeWeed® MBR Plant




                                                     23 /
                            GE WEFTEC.08 Workshop W102 /
                                              10/18/2008




MBR design for nutrient removal




                                                            8
MBR & CAS – what is the same?
Suspended growth process
Liquid-solids separation
Concentrated solids returned to process (RAS)
Solids wasted to control SRT (WAS)




                                                                                    25 /
                                                           GE WEFTEC.08 Workshop W102 /
                                                                             10/18/2008




MBR & CAS – what is different?
                              Elevated DO in
                              membrane tank
                               (4 – 8 mg/L)


                Anoxic          Aerobic                    Membrane




                               RAS
                                                                        WAS

    Elevated MLSS
      (8 – 10 g/L)                                Elevated RAS rate
                                                      (2 – 5 Q)
                                                                                    26 /
                                                           GE WEFTEC.08 Workshop W102 /
                                                                             10/18/2008




Impact of the MBR differences

                            Reduced alpha factor
  Elevated MLSS
    (8 – 10 g/L)            Potential oxygenation capacity limit
                            at short SRT




                   Anoxic      Aerobic         Membrane




                             RAS
                                                          WAS
                                                                                    27 /
                                                           GE WEFTEC.08 Workshop W102 /
                                                                             10/18/2008




                                                                                           9
Impact of the MBR differences

   Elevated RAS              Reduced reactor HRT’s
   rate (2 – 5 Q)            Potential of short-circuiting




                    Anoxic      Aerobic     Membrane




                              RAS
                                                        WAS
                                                                                  28 /
                                                         GE WEFTEC.08 Workshop W102 /
                                                                           10/18/2008




Impact of the MBR differences

  Elevated DO in             Elevated DO in the RAS
  membrane tank              Leads to transfer of O2 with RAS
   (4 – 8 mg/L)




                    Anoxic      Aerobic     Membrane




                              RAS
                                                        WAS
                                                                                  29 /
                                                         GE WEFTEC.08 Workshop W102 /
                                                                           10/18/2008




Basic MLE configuration
                                           Metal Salt
                                           (optional)
              Anoxic           Aerobic                       Membrane




                              RAS
                                                                  WAS


Ammonia removal with chemical P removal however
limited TN removal
                                                                                  30 /
                                                         GE WEFTEC.08 Workshop W102 /
                                                                           10/18/2008




                                                                                         10
Modified MLE configuration
                                          Metal Salt
                                          (optional)
               Anoxic         Aerobic                       Membrane




                               RAS
                                                                 WAS


Improved TN removal by controlling nitrate recycle for process
requirements, not membrane requirements
                                                                                 31 /
                                                        GE WEFTEC.08 Workshop W102 /
                                                                          10/18/2008




Modified UCT for BNR
                                           Metal Salt
                                           (optional)
      Anaerobic    Anoxic       Aerobic                         Membrane




                                 RAS
                                                                     WAS


Moderate TN removal with Bio-P removal
(Traverse City Design)
                                                                                 32 /
                                                        GE WEFTEC.08 Workshop W102 /
                                                                          10/18/2008




BNR to ENR configuration
                                             Carbon

   Anaerobic   Anoxic       Aerobic        Anoxic        Membrane




                             RAS
                                                                           WAS


High degree of TN removal with Bio-P removal
(Broad Run Design)
                                                                                 33 /
                                                        GE WEFTEC.08 Workshop W102 /
                                                                          10/18/2008




                                                                                        11
Modified Johannesburg configuration
                                              Metal Salt
                                              (optional)
      De-Ox   Anaerobic Swing Aerobic   Aerobic       Membrane




                               RAS
                                                                        WAS
                        RAS splitter

Moderate TN removal with Bio-P removal
Reduced mixed liquor pumping (Cauley Creek design)
                                                                              34 /
                                                     GE WEFTEC.08 Workshop W102 /
                                                                       10/18/2008




Swing zone design
Finely tune/balance nitrogen removal
-   Operate as anoxic to enhance denitrification
-   Operate as aerobic to enhance nitrification (e.g.: low
    temperature or peak load conditions)
-   Operate at low DO setpoint to promote simultaneous
    nitrification and denitrification (SND)




                                                                              35 /
                                                     GE WEFTEC.08 Workshop W102 /
                                                                       10/18/2008




Other configurations?
Selection of biological configuration is a function of:
-   Treatment objectives
-   Wastewater characteristics
-   Operating conditions
-   Existing tankage and site layout
-   Personal preference

The configuration options are (almost) endless,
e.g.: Bardenpho, step feed, oxidation ditch, etc.

                                                                              36 /
                                                     GE WEFTEC.08 Workshop W102 /
                                                                       10/18/2008




                                                                                     12
Case study 1
Cauley Creek, GA




Cauley Creek, Georgia
Driver: water reuse
 Phase I Plant                  Phase II Expansion
 2.5 MGD capacity               5.0 MGD capacity

 Commissioned May 2002          Start-up May 2004
 Features:                      Features:
 • 2 bioreactors + 4 ZW tanks   • 4 bioreactors + 8 ZW tanks
 • In-situ recovery cleaning    • ZW Sludge Thickener
 • Cyclic aeration              • Surface foam/sludge wasting
 • Ferric Chloride addition     • Combined Bio-P and Ferric

 Design performance:            Design performance:
 Turbidity      < 0.5 NTU       Turbidity      <0.5 NTU
 TN             < 5 mg/L        NH3-N          <0.5 mg/L
 TP             < 0.13 mg/L     TN             <10 mg/L
                                TP             < 0.13 mg/L                  38 /
                                                   GE WEFTEC.08 Workshop W102 /
                                                                     10/18/2008




Phase II process selection
Wastewater characterization
 Parameter                       Design         Effluent
                                 Influent      Objectives
 COD, mg/L                          570               -
 BOD5, mg/L                         220            < 2.9
 TSS, mg/L                          225            < 5.0
 TKN as N, mg/L                      43               -
 Ammonia as N, mg/L                  32            < 0.5
 TP as P, mg/L                      7.5            < 0.13
 Alkalinity, mg/L as CaCO3          130               -
 Minimum Temperature, oC             14               -
                                                                            39 /
                                                   GE WEFTEC.08 Workshop W102 /
                                                                     10/18/2008




                                                                                   13
 Cauley Creek WRF
 Phase I process flow diagram
                                                                 Membrane
                                         Bioreactors             Filtration
            Fine      Grit
            Screen    Removal                                                        UV

Influent                                                                                      Effluent




                                                                                                       40 /
                                                                              GE WEFTEC.08 Workshop W102 /
                                                                                                10/18/2008




   Cauley Creek WRF
                                               Effluent Storage Pond

                                                                                  UV




                                       Tra   ins
                                4 x ZW                                 4 x Bio Trains




                        Pre-screen & Decanter                                                          41 /
                                                                              GE WEFTEC.08 Workshop W102 /
                                                                                                10/18/2008




 Modified Johannesburg configuration
                                                                                       Ferric
                                                                                       Caustic
                              Anoxic/
           De-Ox     Anaerobic Swing Aerobic           Aerobic            Membrane




                                        RAS
                                                                                              WAS
                                 RAS splitter


              Designed for Bio-P with chemical-P for polishing
                                                                                                       42 /
                                                                              GE WEFTEC.08 Workshop W102 /
                                                                                                10/18/2008




                                                                                                              14
Cauley Creek BNR bioreactor

                                                                   DeOx/DeNit

                                                                 Anaerobic

                                                                Anoxic/Swing


                                                                  Aerobic




                                                                                  43 /
                                                         GE WEFTEC.08 Workshop W102 /
                                                                           10/18/2008




Cauley Creek BNR bioreactor




                                                                                  44 /
                                                         GE WEFTEC.08 Workshop W102 /
                                                                           10/18/2008




Cauley Creek phase II
Design vs. actual influent & effluent
  Parameter                Design      Actual    Actual         Effluent
                           Influent   Influent   Effluent        Limit
  Average Flow Rate, mgd     5.0        4.4                            -
  COD, mg/L                  570        394        12                  -
  cBOD5, mg/L                220        164        <2                2.9
  TSS, mg/L                  225        166        <2                 5
  TKN as N, mg/L             43         33        1.74                 -
  NH3-N, mg/L                32         25        0.22               0.5
  TP as P, mg/L              7.5        5.2       0.09              0.13
  Alkalinity, mg/L as        130        152        54                  -
  CaCO3
  Minimum Temperature,       14         14          -                  -
  oC

                                                                                  45 /
                                                         GE WEFTEC.08 Workshop W102 /
                                                                           10/18/2008




                                                                                         15
Phosphorous prior to Bio-P design
                                  12
                                                                                  Chemical P                           No Ferric                               Chemical P                    No Ferric
                                                                                    Ferric                                                                       Ferric
                                  10
Influent and Effluent TP (mg/L)




                                   8
                                                                                                                                                          Influent TP

                                   6


                                   4


                                   2
                                                                                                                                                          Effluent TP


                                   0
                      Ju 3




                      Se 3




                      Ju 4




                      Se 04
                      Fe 3




                      M 03




                               3




                      Fe 04




                      M 4




                      A 04
                      D 02




                      A 3




                       Ju 3




                      D 03




                      A 4




                       Ju 4
                      Ja 2



                      M 3




                            03

                      N 03



                      Ja 3



                      M 4




                      O 4
                              4
                           -0




                           -0




                           -0
                             0


                           -0




                             0
                          l-0




                           -0

                           -0



                             0
                             0




                             0
                           -0




                           -0




                            0
                           -0
                           -




                         n-




                           -




                         n-



                           -
                         n-




                           -




                         p-




                         n-




                          l-


                         p-
                         b-




                           -




                         b-
                       ug




                       ug
                        ay




                        ay
                        ov




                        ov
                        ar
                        pr




                        ar
                        pr
                        ec




                        ec
                        ct




                        ct
                      O
                      N




                      A




                                                                                                                                                                                                                     46 /
                                                                                                                                                                                            GE WEFTEC.08 Workshop W102 /
                                                                                                                                                                                                              10/18/2008




Phosphorous after Bio-P design
                                                                                   8                                                                                                                         0.8


                                                                                   7                                                                                                                         0.7


                                                                                   6                                                                                                                         0.6
                                                                                                                                             Influent TP
                                                                                                                                                                                                                                Effluent TP [mg/L]
                                                             Influent TP [mg/L]




                                                                                   5                                                                                                                         0.5


                                                                                   4                                                                                                                         0.4


                                                                                   3                                                                                                                         0.3


                                                                                   2                                                                                                                         0.2
                                                                                                                                    Effluent TP                                  Target Limit < 0.13 mg/L

                                                                                   1                                                                                                                         0.1


                                                                                   0                                                                                                                         0.0
                                                                                                   05




                                                                                                                          05




                                                                                                                                                                  06




                                                                                                                                                                                    06
                                                                                       4

                                                                                                   04




                                                                                                                   5




                                                                                                                                     5


                                                                                                                                              5

                                                                                                                                                       05




                                                                                                                                                                             6




                                                                                                                                                                                               6


                                                                                                                                                                                                       6
                                                                                  -0




                                                                                                                 -0




                                                                                                                                  -0


                                                                                                                                             -0




                                                                                                                                                                           -0




                                                                                                                                                                                            -0


                                                                                                                                                                                                      -0
                                                                                                 b-




                                                                                                                        n-




                                                                                                                                                                b-




                                                                                                                                                                                  n-
                                                                                               -




                                                                                                                                                      -
                                                                                                              pr




                                                                                                                               ug




                                                                                                                                                                        pr




                                                                                                                                                                                         ug
                                                                                  ct

                                                                                            ec




                                                                                                                                         ct

                                                                                                                                                   ec




                                                                                                                                                                                                   ct
                                                                                                                       Ju




                                                                                                                                                                                 Ju
                                                                                              Fe




                                                                                                                                                             Fe
                                                                       O




                                                                                                                                         O




                                                                                                                                                                                                   O
                                                                                                             A




                                                                                                                                                                       A
                                                                                           D




                                                                                                                                                  D
                                                                                                                              A




                                                                                                                                                                                       A




                                                                                                                                                                                                                     47 /
                                                                                                                                                                                            GE WEFTEC.08 Workshop W102 /
                                                                                                                                                                                                              10/18/2008




Nitrogen profile
                                                                                  50                                                                                                                        5.0

                                                                                  45                                                                                                                        4.5
                                                                                                                                                                                                                   Effluent TKN and NH3-N [mg/L]




                                                                                  40                                                                                                                        4.0
                                                                                                                     Influent TKN
                                                                                  35                                                                                                                        3.5
                                       Influent TKN [mg/L]




                                                                                  30                                                                                                                        3.0

                                                                                  25                                                                                                                        2.5
                                                                                                                                                                      Effluent TKN
                                                                                  20                                                                                                                        2.0

                                                                                  15                                                                                                                        1.5

                                                                                  10                                                                                                                        1.0
                                                                                                                                               Effluent NH3-N                         Limit < 0.5 mg/L
                                                                                   5                                                                                                                        0.5

                                                                                   0                                                                                                                        0.0
                                                                                                                 5




                                                                                                                                                                         6
                                                                                                                                    5




                                                                                                                                                                         6
                                                                                   4




                                                                                                                                    5




                                                                                                                                                                         6
                                                                                               4


                                                                                                        5




                                                                                                                                   5




                                                                                                                                                        5


                                                                                                                                                                        6




                                                                                                                                                                       06
                                                                                                                -0




                                                                                                                                                                      -0
                                                                                                                                 -0




                                                                                                                                                                      -0
                                                                                  -0


                                                                                             -0




                                                                                                                                 -0


                                                                                                                                                      -0




                                                                                                                                                                      -0
                                                                                                         0




                                                                                                                          0




                                                                                                                                                                  0
                                                                                                      b-




                                                                                                                       n-




                                                                                                                                                               b-




                                                                                                                                                                    n-
                                                                                                              pr




                                                                                                                                                                   pr
                                                                                                                             ug




                                                                                                                                                                  ug
                                                                              ct

                                                                                           ec




                                                                                                                              ct

                                                                                                                                                  ec




                                                                                                                                                                   ct
                                                                                                                     Ju




                                                                                                                                                                 Ju
                                                                                                   Fe




                                                                                                                                                            Fe
                                                                     O




                                                                                                                            O




                                                                                                                                                                 O
                                                                                                             A




                                                                                                                                                                 A
                                                                                       D




                                                                                                                                                  D
                                                                                                                            A




                                                                                                                                                                 A




                                                                                                                                                                                                                     48 /
                                                                                                                                                                                            GE WEFTEC.08 Workshop W102 /
                                                                                                                                                                                                              10/18/2008




                                                                                                                                                                                                                                                     16
rDON can be significant for low TN
                                  8.0                                                                                                 8.0


                                  7.0
                                                   rDON = TKN – NH3-N                                                                 7.0




                                                                                                                                            Effluent TKN and rDON [mg/L]
                                  6.0                                                                                                 6.0
        rDON / Influent TKN [%]




                                                 % rDON of Influent TKN
                                  5.0                                                                                                 5.0


                                  4.0                                                                                                 4.0


                                  3.0                                                                                                 3.0
                                                                                                        Effluent TKN
                                  2.0                                                                                                 2.0


                                  1.0                                                                                                 1.0
                                                                                                        Effluent rDON

                                  0.0                                                                                                 0.0
                                                             5




                                                                             5




                                                                                                            6




                                                                                                            6
                                         4




                                                                                      5




                                                                                                            6
                                                   04




                                                                      05




                                                                                               5

                                                                                                          06




                                                                                                          06
                                                   05

                                                           -0




                                                                                                         -0
                                                                            -0




                                                                                                         -0
                                      -0




                                                                                   -0


                                                                                             -0




                                                                                                         -0
                                                c-


                                                b-




                                                                   n-




                                                                                                       b-




                                                                                                       n-
                                                         pr




                                                                                                      pr
                                                                         ug




                                                                                                     ug
                                   ct




                                                                                   ct

                                                                                          ec




                                                                                                      ct
                                             De




                                                               Ju




                                                                                                    Ju
                                             Fe




                                                                                                   Fe
                                  O




                                                                                  O




                                                                                                    O
                                                        A




                                                                                                    A
                                                                                        D
                                                                        A




                                                                                                    A



                                                                                                                                                 49 /
                                                                                                                        GE WEFTEC.08 Workshop W102 /
                                                                                                                                          10/18/2008




Cauley Creek effluent nitrogen
                                  8.0


                                  7.0


                                  6.0

                                                                             TN
    Effluent N [mg/L]




                                  5.0


                                  4.0

                                                                              NO3-N
                                  3.0


                                  2.0
                                                                       TKN

                                  1.0


                                  0.0
                                                                               5




                                                                                                                         6
                                      4




                                               05


                                                               5


                                                                               5




                                                                               5




                                                                                                 06


                                                                                                   6

                                                                                                                       06




                                                                                                                         6
                                                4




                                                                                                  5
                                                                            -0




                                                                                                                      -0
                                     -0


                                             -0




                                                            -0


                                                                        0




                                                                            -0


                                                                                               -0




                                                                                                -0




                                                                                                                      -0
                                            b-




                                                                     n-




                                                                                              b-




                                                                                                                    n-
                                                                        ug




                                                                                                                  ug
                                           ec




                                                                                            ec
                                                         pr




                                                                                             pr
                                  ct




                                                                         ct




                                                                                                                   ct
                                          Fe




                                                                                           Fe
                                                                   Ju




                                                                                                                 Ju
                                  O




                                                                       O




                                                                                                                 O
                                                        A




                                                                                           A
                                          D




                                                                                           D
                                                                       A




                                                                                                                 A




                                                                                                                                                 50 /
                                                                                                                        GE WEFTEC.08 Workshop W102 /
                                                                                                                                          10/18/2008




Conclusion – very good TN removal

 ….considering:
 • plant does not have a TN limit
 • no post-anoxic zone
 • no external carbon addition
 • influent BOD5/TKN ratio is around 5
 • competition between TP and TN removal


                                                                                                                                                 51 /
                                                                                                                        GE WEFTEC.08 Workshop W102 /
                                                                                                                                          10/18/2008




                                                                                                                                                                           17
Cauley Creek chemical savings with
Bio-P
                        100
                                                                                       62%
                         90
                                                              Chem-P
                         80
                                                      60%
                         70
                              Chem-P
        Dosage [mg/L]




                         60                                                      39%
                                                                       BioWin
                         50
                                                36%
                         40            BioWin

                         30                                                       Actual
                                                Actual
                         20

                         10

                          0
                                       Ferric                          Caustic
                                                                                                          52 /
                                                                                 GE WEFTEC.08 Workshop W102 /
                                                                                                   10/18/2008




Case study 2
Traverse City, MI




Traverse City, MI
ADF: 7.1 MGD (26,500 m3/d)                                  Commission Date: Summer 2004


                                                            Peak flow 17.2 MGD
                                                            (65,000 m3/d)
                                                            Primary Clarifier + Fine
                                                            Screen
                                                            8 ZW500 trains
                                                            Cold weather Bio-P
                                                            removal
                                                               NH3-N              < 1 mg/L
                                                               TP                 < 0.5 mg/L


                                                                                                          54 /
                                                                                 GE WEFTEC.08 Workshop W102 /
                                                                                                   10/18/2008




                                                                                                                 18
Traverse City, Michigan
Driver: space limitation & quality
8.5 MGD Maximum Month Flow design for
bioreactor and 17 MGD Peak Hour Flow design
for membrane filtration
2 BNR bioreactors + 4 ZW tanks each
Equipped with chemical addition for P removal
Plant design by CH2MHill
Commissioned July 2004


                                                                      55 /
                                             GE WEFTEC.08 Workshop W102 /
                                                               10/18/2008




Traverse City WWTP




                                                                      56 /
                                             GE WEFTEC.08 Workshop W102 /
                                                               10/18/2008




Modified UCT configuration

                                    Ferric
     Anaerobic   Anoxic   Aerobic                    Membrane




                           RAS
                                                          WAS




                                                                      57 /
                                             GE WEFTEC.08 Workshop W102 /
                                                               10/18/2008




                                                                             19
Modified UCT configuration




                                                                                  58 /
                                                         GE WEFTEC.08 Workshop W102 /
                                                                           10/18/2008




Traverse City phosphorous profile




          Reference: Daigger, 23rd Annual National Operators
          Training Conference, Chicago, 2006                              59 /
                                                  GE WEFTEC.08 Workshop W102 /
                                                                            10/18/2008




Summary




                                                                                         20
Summary & conclusions

1.   The combination of MBR with ENR can achieve the most
     stringent nutrient limits (TN < 3 mg/L, TP < 0.03 mg/L)
2.   MBR can also be integrated into biological nutrient
     removal configurations to achieve a range of effluent N
     and P concentrations
3.   There are specific design considerations for nutrient
     removal with MBR, e.g.: managing RAS rate and DO in
     RAS
4.   There are multiple process configurations for nutrient
     removal with MBR – each has unique advantages
5.   Nutrient removal with MBR has been successfully
     demonstrated at full-scale
                                                                           61 /
                                                  GE WEFTEC.08 Workshop W102 /
                                                                    10/18/2008




                       Thank You
                      Questions?                                           62 /
                                                  GE WEFTEC.08 Workshop W102 /
                                                                    10/18/2008




                                                                                  21

								
To top