Aeration biological filtering tank with synchronizing removing nitrogen and organics function

Abstract

An aerating biologic filter pool for synchronously removing nitrogen and organic substances is composed of a biologic oxidizing-filtering pool and an oxygen aerating pool. In said biolgoic oxidizing-filtering pool, there are reverse-flushing aerating head, bearing plate, bearing layer and filter layer from bottom to top. Said oxygen aerating pool has the aerating head on its bottom. It features that the aerating and biologic oxidizing are performed respectively in two individual pools.

Description

technical field [0001] The invention relates to an aerated biological filter with the function of synchronously removing nitrogen and organic matter, which is a sewage treatment device which can be used for domestic sewage reuse and sewage secondary treatment, and belongs to the field of environmental protection water treatment. Background technique [0002] The traditional biological aerated filter (BAF) is a sewage treatment process that emerged in the late 1980s and early 1990s. It was originally used for advanced sewage treatment, and later developed into direct secondary treatment. It uses rough and porous granular filters. Biofilm grows on the surface of the filter material, aeration is provided at the bottom of the pool, and when the sewage flows through the filter bed, the pollutants are first filtered and adsorbed, and then oxidized and decomposed by the microorganisms on the surface of the filter material. Its biggest feature is that it integrates biological oxidat...

AI Technical Summary

Problems solved by technology

However, if the existing biological aerated filter wants to achieve the purpose of denitrification, it needs to set up multiple reactors such as carbon oxidation tank, nitrification tank, denitrification tank, etc., and add sewage return devices between the reactors, or use ammonia removal Functional zeolite filler, high infrastructure cost, complicated maintenance and management

At the same time, because the aeration head is located under the filter material, due to the scouring effect of the gas, a part of the biofilm that falls off the filter material is usually carried in the treated water, resulting in high suspended solids in the effluent

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