Multistage moving bed biomembrane reactor

Abstract

The invention relates to a multistage moving bed biomembrane reactor belonging to devices for treating urban domestic sewage, medium and low-concentration chemical wastewater and food wastewater. The multistage moving bed biomembrane reactor is mainly used for treating the urban domestic sewage, the medium and low-concentration chemical wastewater and the food wastewater and comprises a plurality of aeration basins partitioned by partition boards, the length-width ratios of the aeration basins vary with the change of the types of sewage to be treated, and a novel suspending carrier, an aeration device, a mud discharging tube, a water inlet tube and an overflow weir are respectively arranged in each aeration basin. The reactor integrates the advantages of a plug flow reactor and a continuous stirred tank reactor, not only prevents the phenomenon of filler accumulation in the plug flow reactor, but also solves the problems that because the sewage concentrations at the water inlet end and the water outlet end in the continuous stirred tank reactor are approximate, microorganisms are always in a logarithmic phase or a stationary phase, and the maturation of the microorganisms are insufficient, which causes a poor treatment effect. The invention has the advantages of simple structure, science and reasonability, high treatment efficiency, stable water discharge, wide application range and the like.

Description

Technical field [0001] The invention relates to a multi-stage moving bed biofilm reactor, belonging to a treatment device for urban domestic sewage, medium and low concentration chemical wastewater and food wastewater. Background technique [0002] The moving bed biofilm reactor is a process that couples the biofilm process and the activated sludge process. This technology runs the biofilm method as activated sludge by adding suspended biological carriers in the biological aeration tank. It not only has the advantages of traditional biofilm method with impact load resistance, long sludge age, and less residual sludge, but also It has the high efficiency and operational flexibility of the activated sludge method. In addition, it also has the characteristics of small head loss, not easy to be blocked, no backwashing, and generally no need for backflow, and because the suspended carrier provides a simultaneous aerobic and anaerobic metabolic environment, it has the effect of simult...

AI Technical Summary

Problems solved by technology

However, in the plug-flow type, the horizontal linear velocity of the water flow is relatively large, so that the suspended filler moves quickly to the end of the pool with the water flow, which easily leads to its accumulation at the end of the pool. Under the current technical conditions, the filler accumulated at the end of the pool is like Sludge backflow to the front of the pool is not easy to achieve

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