Annular flow aerobic granule sludge reactor

Abstract

The invention relates to an annular flow aerobic granule sludge reactor for increasing the utilization ratio of dissolved oxygen, which is used for effectively solving the problems of non-uniform aeration and high-concentration dissolved oxygen of the aerobic granule sludge reactor. In the annular flow aerobic granule sludge reactor, a plurality of guide plates are arranged in the cavity of the reactor for partitioning the cavity of the reactor into a plurality of reaction regions; the guide plates are hermetically connected with the side wall of a reactor body; a reaction liquid channel is formed between the upper and lower ends of two adjacent guide plates; the upper end of each guide plate is lower than a reaction liquid, and the bottom end of each guide plate is a certain distance away from the bottom wall of the reactor body, so that a longitudinally-communicated reaction region is formed; the bottoms of the reaction regions at the leftmost end and the rightmost end are provided with aerators respectively; the other reaction regions are provided with aerators at one interval; a water inlet pipe is arranged on the upper part of a left end reaction region; the side wall of the reactor body is provided with a water outlet; an upper water outlet is lower than the reaction liquid; and the aerators are communicated with a main aeration pipe. According to the invention, dissolved oxygen is distributed uniformly, the hydraulic shear force needed by sludge granulation is ensured, and the utilization ratio of dissolved oxygen in the reactor is increased.

Description

technical field [0001] The invention relates to a wastewater biological treatment device, in particular to a circulation type aerobic granular sludge reactor for improving the utilization rate of dissolved oxygen. Background technique [0002] Aerobic granular sludge is a cell self-immobilized particle formed spontaneously under aerobic conditions, and is essentially a special biofilm. In recent years, aerobic granular sludge has become a research hotspot in the field of sewage treatment due to its main characteristics of high sludge concentration, good settling performance, strong impact load resistance, simultaneous removal of organic matter and nitrogen and phosphorus removal. [0003] Two prerequisites for aerobic sludge granulation are appropriate hydraulic shear forces and a high concentration of dissolved oxygen. The aeration in the reactor promotes the water flow formed to generate hydraulic shear force on the suspended sludge. The current research is basically to p...

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Problems solved by technology

[0004] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide a circulation type aerobic granular sludge reactor which improves the utilization rate of dissolved oxygen, which can effectively solve the problem of exposing the existing aerobic granular sludge reactor. The problem of uneven gas and high concentration of dissolved oxygen and low utilization rate of dissolved oxygen

[0006] The present invention effectively solves the problem of uneven distribution of dissolved oxygen in existing reactors and the need for high dissolved oxygen concentration to maintain appropriate hydraulic shear force, ensures the hydraulic shear force required for sludge granulation, and improves the dissolution rate in the reactor. Oxygen utilization

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