SEWAGE TREATMENT APPARATUS AND METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To solve the problem that in dynamic filtration, when a filter body is arranged from the front stage of a reaction tank in such a case that the reaction tank is a push-out flow system, the clogging of filter cloth of the front stage portion is generated because of high turbidity in the front stage and a filtrate flow rate lowers.

SOLUTION: A dynamic filter apparatus is constituted so that filter cloths permitting the passage of activated sludge are provided in a biological reaction tank having an air diffusion pipe immersed and arranged therein and a filter body having a filtered water taking-out port is immersed and arranged in the falling stream of turning flow formed by the air diffusion of the air diffusion pipe to form activated sludge layers on the surfaces of the filter cloths and the activated sludge mixed liquid is filtered to take out filtered water. In this filter apparatus, the filter body is arranged to the rear stage part of the biological reaction tank of a push-out flow system to continue a treatment stable over a long period of time.

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