Device for preventing water outlet of biochemical tank from being blocked by MBBR (Moving Bed Biofilm Reactor) filling

Abstract

The invention provides a device for preventing a water outlet of a biochemical tank from being blocked by MBBR (Moving Bed Biofilm Reactor) filling. The device comprises a U-shaped water outlet screen mesh arranged at the front part of the water outlet; mesh holes of the water outlet screen mesh are rhombuses with inner angles of 120 degrees and 60 degrees respectively; the edge length of each rhombus is calculated according to the size of the MBBR filling; a rear side of the screen mesh is clung to the inner side of the tank wall, which is provided with the water outlet, of the biochemical tank and covers the water outlet; the upper edge of a front side of the screen mesh is higher than the water level of the biochemical tank; a water outlet aeration pipe, which is connected with an air source through an air conveying pipe and a valve, is arranged on the bottom surface of the screen mesh; a material stopping plate is arranged on the tank wall, above the water outlet hole, of the biochemical tank, the material stopping plate is bent towards to the inner side of the tank and an upper edge of the material stopping plate is higher than the upper edge of the front side of the screen mesh; an assisted aeration pipe, corresponding to the water outlet screen mesh, is arranged at an end part, close to the tank wall, which is provided with the water outlet, of the biochemical tank, on the bottom surface of the biochemical tank. By utilizing the device provided by the invention, the water outlet of the biochemical tank can be effectively prevented from being blocked by the MBBR filling, and phenomena that the operation of equipment is influenced and the MBBR filling is lost due to sewage overflowing caused by the fact that the water outlet is blocked by the MBBR filling are avoided.

Description

Technical field [0001] The invention relates to a sewage treatment device, in particular to a device used for a biochemical treatment sewage tank to prevent MBBR filling from blocking the water outlet. Background technique [0002] MBBR (Moving Bed Biofilm Reactor) process, the full name of moving bed biofilm reactor process, the process by adding a certain amount of suspended carrier to the reactor, that is, MBBR additive, because the density of the additive is close to water, so in the aeration When it is in a state of complete mixing with water, the environment where microorganisms grow is gas, liquid, and solid. Through the collision and shearing effect of the carrier in the water, the air bubbles are made smaller and the utilization of oxygen is improved; at the same time, a single carrier (usually a hollow cylinder) has different biological species inside and outside, and some anaerobic bacteria or bacteria grow in the inner pores. Facultative bacteria, the outside is good...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of device that prevents MBBR from adding materials to block the water outlet of the biochemical pool, to solve the problem of MBBR adding materials to block the biochemical pool that exists in existing sewage treatment plants Technical problem with water outlet

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