Sewage treatment device

Abstract

The invention relates to a sewage treatment device which comprises a plurality of packing cups and packing, and the packing cups are sequentially stacked in the vertical direction. The packing is arranged in the packing cups and is used for the growth of biofilms. The packing cups can be rotationally switched between a first position and a second position. When each packing cup is positioned at the first position, the inclination angle of each packing cup is a first angle, the sewage can flow through the plurality of packing cups in sequence from top to bottom by virtue of gravity, and can bein full contact with the biofilms grown on the corresponding packing in the process of flowing through the packing cups and form water films on the surfaces of the biofilms, so that the biofilms grownon the packing in the plurality of packing cups perform biochemical treatment on the sewage in sequence; and when each packing cup is located at the second position, the inclination angle of each packing cup is a second angle, and the second angle is larger than the first angle, so that aged biofilms and dirt attached to the packing in the packing cups are separated from the packing by virtue ofgravity and are discharged from the corresponding packing cups.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a sewage treatment device. Background technique [0002] The existing sewage denitrification methods include A / O method, A2 / O method and other processes. Specifically, firstly, aerobic microorganisms are used to nitrify sewage in an aerobic tank to realize COD, organic nitrogen, ammonia nitrogen, etc. in sewage. The degradation of pollutants, followed by denitrification treatment of sewage in anoxic tanks using anaerobic or facultative anaerobic microorganisms to convert nitrate nitrogen and / or nitrite nitrogen produced in the nitrification stage into nitrogen gas, so as to finally achieve Denitrification of sewage and degradation of organic matter in sewage; however, the above methods generally have problems such as large area, high energy consumption, and low biochemical treatment efficiency, which are difficult to meet the actual needs of current sewage bioche...

AI Technical Summary

Problems solved by technology

[0002] The existing sewage denitrification methods include A / O method, A2 / O method and other processes. Specifically, firstly, aerobic microorganisms are used to nitrify sewage in an aerobic tank to realize COD, organic nitrogen, ammonia nitrogen, etc. in sewage. The degradation of pollutants, followed by denitrification treatment of sewage in anoxic tanks using anaerobic or facultative anaerobic microorganisms to convert nitrate nitrogen and / or nitrite nitrogen produced in the nitrification stage into nitrogen gas, so as to finally achieve Denitrification of sewage and degradation of organic matter in sewage; however, the above methods generally have problems such as large footprint, high energy consumption, and low biochemical treatment efficiency, which are difficult to meet the actual needs of current sewage biochemical treatment

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