Water reclamation of urban waste water in Wolfsburg
4 June, 2050
Waste water source
The wastewater treatment plant Stahlberg (Wolfsburg) treats the urban wastewater coming from 90,000 households in Wolfsburg. In addition to the wastewater from the urban households there are several indirect discharges like hospitals and dental surgeries. Most of the cities sewerage uses a separate system but a part of the city center of Wolfsburg has a combined system which leads to a mixture of household wastewater and stormwater.
The reclaimed water coming from the wastewater treatment plant Stahlberg is first distributed.
The farmers using the reclaimed water mostly cultivate grain (40 %), energy crops (30 %), sugar beets (10 %) and rape seed (10 %). All the farmers practice rotating farming. The reclaimed water is irrigated via hose drum. The irrigation with reclaimed water is demand-oriented.
Waste water treatment description
Nutrient removal : Struvite precipitation
Pesticide removal : none
Disinfection : none
Suspended solids removal : none
The hourly effluent of the wastewater treatment plant Stahlberg is about 1,100 m³/h. Related to the seasonal precipitation, the irrigation with reclaimed water is in line with the demand of the crops. The average amount of reclaimed water is about 4 million m³/year.
Extent of the agricultural beneficiaries
The area provided with reclaimed water is about 1,550 ha.
Type of agreement
WEB provides the farmers with reclaimed water. The farmers are fully responsible for the operation and maintenance of the distribution and irrigation system. Due to restrictions regarding micro pollutants the irrigation with reclaimed water has to be demand-oriented.