Biological sewage processing plant, comprises a bioreactor, with an eddied carrier for micro-organisms and a trap to retain the carrier particles on water take-off

摘要

Biological sewage processing plant, comprises a bioreactor (3) at the outlet side of a sludge basin, with an eddy carrier (10) for colonies of micro-organisms. It has an aerator (5) and a sludge take-off (8). Biological sewage processing plant, comprises a bioreactor (3) at the outlet side of a sludge basin, with an eddy carrier (10) for colonies of micro-organisms. It has an aerator (5) and a sludge take-off (8). A storage basin (2), for partially activated sludge, is between the initial processing basin and the bioreactor, with a sludge feed (7) into the bioreactor. The micro-organism carrier takes up about 50% of the bioreactor. The micro-organism carrier has a density of 0.80-0.98 g/cm3, with a physical surface with a bulk volume of 200-500 m2/m2. A trap (9) in the bioreactor has openings matching the geometry of the carrier particles, so that the carrier material is retained on water take-off. A conventional take-off within the trap is linked to an external outflow (11).