Sewage processing technology by anoxic-aerobic biological fluidized bed

Abstract

The invention discloses a sewage processing technology by an anoxic-aerobic biological fluidized bed. The technology provided by the invention is mainly characterized in that a sewage raw material enters the bottom of an anoxic biological fluidized bed for a reaction; a part of the flowing anoxic biological fluidized bed reactants after the reaction is used as a reflux and the other part enters the bottom of an aerobic biological fluidized bed for a reaction; a part of the flowing aerobic biological fluidized bed reactants after the reaction is used as reflux of the anoxic biological fluidized bed to return to the anoxic biological fluidized bed and the other part enters a separator for separation; a flowing substance at the upper portion of the separator after separation is discharged; a part of sludge at the bottom of the separator is discharged to a sludge processing system; and the other part is pumped into the anoxic biological fluidized bed, or pumped into the anoxic biological fluidized bed and the aerobic biological fluidized bed. By the adoption of the processing technology, sewage processing effect of the system can be raised, and the load and impact resistance of the biochemical system can be improved.

Description

technical field [0001] The invention belongs to the field of sewage biological treatment, in particular to an anoxic-aerobic biological process for treating petrochemical sewage and light industrial sewage. Background technique [0002] With the development of my country's urban scale and the continuous improvement of the degree of industrialization, a large amount of difficult-to-treat industrial sewage and domestic sewage are produced, and sewage treatment plants are facing severe challenges, especially in the field of industrial sewage treatment, with large sewage discharge, complex water quality, and toxicity. Large, ammonia nitrogen and COD are relatively high. The aerobic process alone is no longer able to completely biodegrade the organic matter in sewage, and finding a method that can efficiently remove the so-called biodegradable substances has become the focus of sewage biological treatment research in recent years. The anoxic sewage treatment process can not only ...

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Problems solved by technology

[0009] The present invention provides an anoxic-aerobic biological fluidized bed sewage treatment process for the problems of low efficiency, large floor area, and difficulty in discharging sewage up to the standard in the existing sewage treatment technology.

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