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BOD

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					GIVEN                                   BOD Kinetics
The following sets of sample and seed control were incubated daily at 22 degrees C.

Seed Control
Day Final D.O. Final D.O. Final D.O. Final D.O. Final D.O. Final D.O. Avg. Final Initial D.O. Difference
   0                                                                                     8.67
   1       8.53      8.55       8.58       8.53        8.55      8.59                    8.81
   2       8.87      8.89       8.83       8.84         8.9                              9.55
   3       8.16      8.14       8.16       8.18        8.17                              8.27
   6       7.66      7.59       7.66       7.65        7.67                              8.46
   7       8.44      8.39       8.45       8.44        8.43                              8.46
   8       8.28      8.18       8.25       8.23        8.26                              8.51
   9       8.33      8.35       8.36       8.36        8.36                              8.51
  10       8.36        8.4      8.46       8.45        8.45                              8.71
  14       8.45      8.39       8.39       8.43        8.42


Untreated Industrial Wastewater                  (seed was added directly to the diluted sample bottles)
Dilution 4:1000          P=                   f=     1                                                   Daily          Cumulative
Day Final D.O. Final D.O. Final D.O. Final D.O. Final D.O. Final D.O. Avg. Final Initial D.O. Difference   BODn         BOD
    0                                                                                      8.64
    1        7.4       5.61     6.79       5.96        7.09      6.55                      8.75
    2       4.51       4.44     4.47       4.48        4.43                                9.44
    3        4.6       4.56     4.69       4.77         4.9                                8.34
    6       2.86       2.66     2.77       2.56        2.86                                8.25
    7       7.83       7.84     7.84       7.89        7.86                                8.46
    8       7.75       7.77     7.77         7.8       7.82                                8.45
    9       7.92       7.88     7.92       7.92        7.91                                8.49
   10       8.16         8.3    8.24       8.22        8.21                                8.64
   14       8.27       8.25     8.24       8.26        8.27

Problem:
1. Calculate the cumulative BOD of the untreated wastewater, subtracting the seed control's contribution of D.O.
      Fill in the values in the tables above.
2. Using the BODfitprot.xls tool, enter the day and cumulative BOD values, starting with day 0, to determine the k and UBOD (L) values
3. Use the Fujimoto method to determine the k and UBOD values.
4. Find k20 for the Fujimoto and non-linear regression-derived k values.
      Use a temperature correction coefficient (θ) of 1.056

				
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posted:12/19/2011
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