An aeration device below the membranes provides an air-stream and thus a coupled hydraulic flow along the membrane surface. The cleaned water is filtrated through the fine pores of the membrane (= permeate) and flows through the hollow fibers to two permeate pipes. The hydraulic flow and extraction of the permeate is achieved through a suction pump or slight hydraulic pressure gradient and is therefore energetically highly efficient (appr. 0,12 kWh/m3).
- Smaller treatment volumes – savings on land
- No wash-out of biomass due to 100 % withdrawal of biomass on membrane surface
- Enhanced biological degradation due to highly specific biomass and high sludge age
- No influence of peak flows on quality of permeate (= clean water)
- Germ free effluent