Waste management
in the
Hannover-Region
Waste Collection in the Past
Waste management has been a municipal responsibility
for 100 years.
Waste Collection Today
• Since 2003, a regional responsibility serving 1.1 million people
• Approx. 1,000 employees
• Public service enterprise (no privatisation!)
Hannover Lahe Waste Tip
• Central waste tip since
1937
• Monitoring of seepage
water and gas since 1990
• No more unprocessed
waste is dumped since
2005.
Reduction Waste by Factor 5
Dramatic reductions in waste quantities
(1989 - 2002)
1.000.000
Waste avoidance 900.000
(- 380,000 t) 800.000
Avoidance
Dumping of soil, building 700.000
rubble, sewage sludge 600.000
Menge [t]
(- 340,000 t) 500.000
Recycling, composting of 400.000
Recycling
organic waste (+ 72,000 t) 300.000
200.000
Recycling of glass, paper, 100.000
Disposal
packaging and scrap metal 0
(+ 41,700 t) 1989 2002
Decrease in waste-to-disposal from c. 1,000,000 to
200,000 tonnes p.a. in the City of Hannover
Household Waste
Pre-sorting
Result at Kronsberg-housing-area:
Approx. 30% reduction in waste volumes
(City: 219 kg per household p.a.,
Kronsberg: 154 kg per household p.a.)
Paper
• 4,500 paper collection bins in the city
• plus weekly kerbside collections
• 40,600 tonnes p.a. = 79 kg per inhabitant
Glass
• More than 400 bottle banks in the city
• 16,800 tonnes p.a.= 33 kg per inhabitant
• Decrease due to new regulations on returnable containers this year
Packaging
(Yellow Sack)
• 5,300 collection bins
• plus kerbside collection
every other week
• 11,000 tonnes p.a. = 21 kg
per inhabitant
Composting
• 1998
establishment of organic waste
collection system
• 2002 18,500 t
(35 kg per inhabitant)
• plus 32,000 t
green waste from plant
nurseries and gardens
Waste Concept
Home composting
Great potential for
commercial waste reduction
Disposal 1989 2002
soil 110,000 t 2,000 t
sewage sludge 60,000 t 0
rubble 73,000 t 20,500 t
construction waste 125,000 t 5,500 t
Example
Soil Management
Result at Kronsberg:
700,000 m3 excavated soil re-used, making about 100,000 lorry
journeys unnecessary and thus saving 1,200 tonnes of CO2 emissions
Example: Construction Sites
• Waste sorting on site
• Recycling of waste from demolition and modernisation projects
• 1989 - 2002, reduction in rubble and building site waste of around
170,000 tonnes p.a.
City of Hannover Waste Treatment in 2002
organics commercial waste bulky waste household
sewage sludge street sweepings
construction waste waste
ca. 69,000 t/a ca. 1,000 t/a ca. 51,000 t/a ca. 38,000 t/a ca. 90,000t /a ca. 15,000 t/a ca. 16,000 t/a
ca. 70,000 t/a ca. 5,000 ca. 215,000 t/a
composted mechanical residual waste treatment
ca. 100,000 ca. 100,000 ca. 15,000
ca. 100,000 t/a ca. 100,000 t/a
biological waste to energy
treatment since 2005
since 2006 ca. 5,000
ca. 35,000
ca. 70,000
ca. 25,000 ca. 3,000
hazardous
slag waste landfill recyclables
landfill ca. 70,000 t/a
compost ca. 35,000 t/a ca. 25,000 t/a ca. 3,000 t/a ca. 20,000 t/a
Waste Treatment Concept for
the Hannover Region
(from 2005)
350,000 tonnes p.a. residual waste
(unavoidable, unrecyclable)
230,000 t coarse fraction
120,000 t fine fraction
(thermal value)
> fermentation
> incineration
Gas used for
Energy used for
electricity generation
electricity generation