Waste water process and assembly for activated sludge

摘要

Activated sludge process and assembly apply a biological treatment process to waste water, in which the water impurities are absorbed or biochemically converted by suspended microorganisms. A portion of the treated activated sludge is returned within the process. The novelty is that a portion of the returned activated sludge is tapped off and aerated, regenerating the activated sludge and/or reducing the incidence of surplus sludge. The tapped off portion of the activated sludge is thickened by floatation, sedimentation or a similar process. The assembly consists of an activated sludge basin followed by a settlement tank, a pipe system by means of which a portion of the activated sludge is returned and a regeneration vessel linked to the system with a by-pass pipe.