portrait stadtentwässerung dresden gmbh
DESCRIPTION
Kurzvorstellung des Dresdner AbwasserunternehmensTRANSCRIPT
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Stadtentwässerung DresdenWe will clear it up for you!
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Dresdens ppp-model
private public partnership by the capital of Saxony and GELSENWASSER AG
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More than 100 years of experience
1870 the planned development of the sewer system started
1910 the waste water treatment plant Dresden-Kaditz was put into operation
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Some facts about Dresden
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About us
main tasks
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Our capital assets
582 million Euros
annual turn over84 million Euros
405 employeesamong them approx. 32 apprentices
technical staff258 employees
commercial staff and management
115 employees
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Solid tools for the job
1,750 kilometer: length of all sewers central treatment plant Dresden-Kaditz
740,000 population equivalent 3 smaller local sewerage plants
separated system
combined system
Two main collectorsalong the river Elbe
STPDresden-Kaditz
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Our catchment area
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Overflow management system
2 large storm water overflow tanks (in sum with a capacity of 36,000 cubic meters)
14 channels with a total storage capacity of56,000 cubic meters
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Flood protection
Flood pumping station Stetzsch: 1,2 m³/s
Flood pumping station Kläranlage Kaditz: >9 m³/s
Flood pumping station Johannstadt (ab 2010): bis 18 m³/s
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In the Eighties of the last century the river Elbe was one of the most polluted European rivers
Foto: Waltraut Kossack
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Investments in the canalizationbetween 1990 and 2010
326 million Euros53 % reconstruction47 % extension
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Investments in the Sewage treatment plantsbetween 1990 and 2010
268 million Euros
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The fees in Dresden
1.69 Euros per year for every square meter sealed surface which is connected with the public sewer system
1.73 Euros per cubic meter used drinking water
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Environmental Services for a adequately price
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120 Tm³/d
56 million m³/a
1500 m³/d
50 tTS/d
hydro energy
heat energy from
wastewater solar power
geothermics
biogas
An innovative energy conceptsaves money and protects the environment
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Our solar power plant ison the roof of the rainwater tank
Dresden’s second largest solar power plant with an output of 190 kWh
in 2009 the plant produced an amount of 170 MWh
that correlates with the annual need of 45 families and with 0.7 percent of the total consumption of the STW Kaditz (cash-equivalent is 95,000 EUR)
the investment (900,000 EUR) will be refinanced within 12 years
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Hydro energy by turbine in the STW outlet use of the difference between the water levels of the secondary clarifier and the river Elbe
in 2009 the plant produced about 672 MWh energy, which correlates to the consumption of 170 families
which also correlates to 2.7 percent of the total consumption of the STW Kaditz
feeding the hydro-electric power into our own grid reduces the energy costs
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Heat energy from waste water
new construction of the fire and civil protection center heat supply: 750 MWh/year coolness supply: 100 MWh/year annual heat demand will be covered up to 45 percent annual coolness demand will be covered up to 100 percent
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Extension of the sludge treatment new construction of a biogas plant
technical solution: digestion towers with a volume of 2x10,500 cubic meters
combined heat and power unit
fluid sludge utilization
generation of biogas with an energy equivalent of 33,573 MWh/year
including 12,758 MWh electric power
reduction of sludge mass by about 30 percent
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Commitment for following generation