Gas stripping double circulation-continuous flow granular sludge reactor and method for treating sewage by adopting reactor

Abstract

The invention relates to the technical field of sewage treatment, and particularly discloses a gas stripping double circulation-continuous flow granular sludge reactor and a method for treating sewage by adopting the reactor. The reactor comprises a gas stripping aeration tank (1), a sedimentation tank (2) and a gas stripping plug-flow tank (3) which communicate with each other in sequence, wherein a plurality of aeration pipes (6) are vertically arranged at the bottom of the gas stripping aeration tank (1), first aerators (71) are arranged in the pipe bottoms of the aeration pipes (6), and holes (10) are formed in the bottoms of the pipe walls of the aeration pipes (6); a plurality of inclined pipes or inclined plates (8) are arranged in the sedimentation tank (2), and a water outlet (5) is formed in the upper part of the sedimentation tank (2); and a second aerator (72) is arranged at the bottom of the gas stripping plug flow tank (3), and a water inlet (4) is formed in the upper part of the gas stripping plug flow tank (3). The reactor disclosed by the invention can stably run for a long time, and is simple to operate and high in sewage purification efficiency.

Description

technical field [0001] The present application relates to the technical field of sewage treatment, more specifically, it relates to an air-lift double-circulation-continuous flow granular sludge reactor and a method for treating sewage by using the reactor. Background technique [0002] Sewage treatment refers to the process of purifying sewage to meet the water quality requirements for discharge into the environment or reuse. Sewage treatment can generally be divided into three types according to their functions: physical method, chemical method and biological method. Among them, physical method mainly uses gravity, centrifugation, reverse osmosis, air flotation and other physical effects to separate insoluble substances in sewage. No chemical reactions are involved in the treatment process; chemical methods mainly use chemical reactions such as flocculation, neutralization, redox, and ion exchange to treat or recover dissolved or colloidal substances in sewage; and biologi...

AI Technical Summary

Problems solved by technology

However, due to the harsh conditions for the stable operation of aerobic granular sludge, research and application achievements at home and abroad have mainly focused on the use of SBR to operate aerobic granular sludge.

However, SBR also has problems such as low volume utilization, discontinuous effluent, low equipment utilization, and complicated operation control, making it only suitable for small-scale sewage treatment

[0005] At present, medium and large-scale sewage treatment plants around the world usually use continuous flow reactors. Although there are a few studies on the use of continuous flow reactors to cultivate aerobic granular sludge, continuous flow reactors still face difficulties. Maintain long-term stable operation, easy disintegration of particles, low treatment efficiency, complex process and other problems, so how to realize the long-term stable operation of aerobic granular sludge in continuous flow reactor has important practical and scientific significance

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