Röhren- und Pumpenwerk BAUER > Tes­ti­mo­ni­als > 31 Rain­stars in Braun­schweig, Germany
Bauer Beregnung Rainstar
Braun­schweig in Germany

Making water valu­able again

31 irri­ga­tion machines from Bauer operate under the unique Braun­schweig model in north­ern Germany. The local waste­water asso­ci­a­tion secures the pro­duc­tion of food and energy plant pro­duc­tion in this way.

The Braun­schweig Waste Water Asso­ci­a­tion is a water and soil asso­ci­a­tion located in Braun­schweig in north­ern Germany and is respon­si­ble for waste­water treat­ment in Braun­schweig and the sur­round­ing area. With its 80 employ­ees and an annual revenue of approx­i­mate­ly 35 million euros, the asso­ci­a­tion is con­sid­ered a mid-sized busi­ness in Germany.

The Braun­schweig model devel­oped by the asso­ci­a­tion is unique through­out Germany and com­bines waste­water from the city with bioen­er­gy from the sur­round­ing rural areas to create a water-food-energy cycle:

The waste­water is treated mechan­i­cal­ly and bio­log­i­cal­ly, and the result­ing clean water is used to irri­gate the agri­cul­tur­al lands of the asso­ci­a­tion members. The energy plants cul­ti­vat­ed in the irri­gat­ed regions are processed in the association’s own biogas plant for CO²-neutral pro­duc­tion of biogas. This secures the supply of several thou­sand house­holds in Braun­schweig with power and heat.

Bauer Beregnung Rainstar
2000 hours per year

31 Rain­stars in action

The waste­water asso­ci­a­tion cur­rent­ly used 31 irri­ga­tion machines from Bauer to dis­trib­ute the treated water. The oldest Bauer irri­ga­tion machine has been in oper­a­tion already since 2003 and has exhib­it­ed no major prob­lems in this time. The machines are in oper­a­tion from Feb­ru­ary to October, for an average of 2,000 oper­at­ing hours per year. Thanks to the full gal­va­niza­tion, the Bauer machines are reli­able, long-lasting and operate with low pres­sure losses. For this reason, the Braun­schweig Waste Water Asso­ci­a­tion is already plan­ning to pur­chase further Rain­stars in future.

Grafik Abwasserverband D

The water cycle

  1. Each res­i­dent of Braun­schweig and its envi­rons con­sumes 122 liters of water per day, which flows into the sewer network.
  2. 86 pump sta­tions bring 700 liters of water per second to the Stein­hof treat­ment plant for clean­ing. The plant treats 60,000 cubic meters of waste water both mechan­i­cal­ly and biologically.
  3. 20,000 cubic meters of clean water is brought to the sewage-irri­gat­ed field daily for sec­ondary treat­ment and storage.
  4. 2,700 hectares of agri­cul­tur­al land is irri­gat­ed each year with 10–11 million cubic meters of cleaned waste water.
  5. The energy crops cul­ti­vat­ed in the irri­ga­tion area of the Braun­schweig Waste­water Asso­ci­a­tion are used for the CO2-neutral pro­duc­tion of biogas in the association’s own biogas plant. The Braun­schweig waste­water asso­ci­a­tion sup­plies the biogas via a 20-kilo­me­ter pipeline to the local energy sup­pli­er, which gen­er­ates elec­tric­i­ty and heat for several thou­sand house­holds in Braunschweig.