Low-dissolved-oxygen biochemical reaction system and process thereof

Abstract

The invention belongs to the technical field of water treatment, and particularly relates to a low-dissolved-oxygen biochemical reaction system and a process thereof. The low-dissolved-oxygen biochemical reaction system comprises two membrane pools, each membrane pool is internally provided with a membrane assembly, the bottom of each membrane assembly is provided with an aeration device, and theaeration devices are used for flushing and aerating the membrane assemblies; the system further comprises a reaction channel with an opening in the top, a partition wall and at least one upper-openingand lower-opening flow guide plate set. The reaction channel is communicated with the membrane pool through a lower opening flow guide plate set; the partition wall is vertically arranged at the bottom end in the reaction channel; at least one upper opening flow guide plate set and at least one lower opening flow guide plate set are fixedly arranged in the reaction channel at intervals; at the moment, a dissolved oxygen-containing solution generated by membrane scouring aeration is pushed to flow in the reaction channel by taking gas stripping as power, dissolved oxygen is gradually consumedand reduced in the process that water flow flows through the reaction channel, synchronous nitrification and denitrification are further realized under the required anoxic condition, and the use of aliquid circulating pump is reduced.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a low dissolved oxygen biochemical reaction system and a process thereof. Background technique [0002] Membrane bioreactor (MBR) is a new type of high-efficiency sewage treatment process that combines high-efficiency membrane separation technology with traditional activated sludge process. Due to the filtration effect of the membrane, the microorganisms are completely trapped in the MBR membrane bioreactor, which realizes the complete separation of the hydraulic retention time and the sludge age of the activated sludge, and eliminates the sludge bulking problem in the traditional activated sludge process. Membrane bioreactor sewage treatment process has high pollutant removal efficiency, strong nitrification ability, good denitrification effect, stable effluent water quality, low residual sludge output, compact equipment, and less land occupation (only 1 / 3- ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the existing technical problems that the sewage treatment system in the MBR membrane bioreactor sewage treatment process needs biochemical aeration, flushing aeration and the nitrifying liquid backflow system needs a backflow pump with high energy consumption, the invention provides a low dissolved oxygen biochemical reaction system and process

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