Wastewater treatment method by high concentration activated sludge method

摘要

In the waste water treatment method using the activated sludge method, the sludge reduction tank 8 installed upstream of the aeration tank is used to treat a part of the to-be-treated sludge before the sludge used as the sludge of the aeration tank is introduced into the aeration tank 9 The MLSS concentration of the aeration tank can be increased and the SS load is lowered to improve the removal efficiency of the organic matter. As a result, the sedimentation efficiency in the sedimentation tank 11 is improved, The present invention provides a method for treating wastewater by a high concentration activated sludge method capable of stabilizing the amount of the excess sludge 16 and significantly reducing the amount of the excess sludge 16 generated.