method for operating a sewage treatment plant and a sewage treatment plant with a klarwasser - entnahmepumpe for implementation of the procedure

摘要

During operation of a single waste water treatment basin, activated sludge is allowed to settle, prior to the pumped discharge of treated water. The discharge pump is especially switched on for a short time during the sedimentation stage, causing water to rise in an ascending section of the pressure pipe on the discharge side of the pump. The pump pulse causes a quantity of water to return to the basin. An Independent claim is also included for a discharge pump (28) for clear water which can be regulated to produce a pulse of water during the sedimentation stage in a rising section of pipe (30) downstream from the pump, returning water to the basin (10). The pump gives only a series of short pulses, discharging water only from the rising section of pipe.