Method for maintaining operation stability of aerobic granular sludge reactor based on particle size control

Abstract

The method for maintaining the operation stability of the aerobic granular sludge reactor based on particle size control is to take a certain volume of mud-water mixture in the aerated state of the reactor after the aerobic granular sludge reactor realizes aerobic granulation. The aerobic granular sludge with different particle size ranges is obtained after sieving sequentially with standard sieves from large to small apertures, and the volume is fixed to the same volume; the aerobic granular sludge with constant volume is crushed separately using an ultrasonic cell crusher, The granulation rate of the crushed sludge was measured respectively, and the one with the highest granulation rate was the optimum particle size range for stability; after that, the mud-water mixture in the reactor was regularly screened, and the collected aerobic sludge in the optimal particle size range was The granular sludge is returned to the reactor, and the aerobic granular sludge with other particle sizes is stored for later use, thereby gradually increasing the mass ratio of the aerobic granular sludge with the optimum particle size range for stability. The invention can maintain the stability of the aerobic granular sludge reactor in operation for a long time, thereby realizing efficient treatment of sewage.

Description

technical field [0001] The invention relates to the technical field of wastewater biological treatment. Background technique [0002] Aerobic granular sludge (AGS for short) is a granular biopolymer formed by the spontaneous aggregation and proliferation of microorganisms in a specific environment. At present, aerobic granular sludge technology has become a research hotspot in the field of wastewater treatment. However, the long-term operation of aerobic granular sludge in the reactor often appears unstable or even disintegrated, such as figure 1 The aerobic granular sludge in the expansion and disintegration of filamentous bacteria is shown, and the reason for the unstable operation of the aerobic granular sludge reactor has not yet been clarified, and the relevant stability maintenance measures are also very scarce. This deficiency greatly limits the application and promotion of aerobic granular sludge technology, resulting in most of the research is still at the level o...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for maintaining the operation stability of an aerobic granular sludge reactor based on particle size control, so as to solve the problem that the aerobic granular sludge reactor is prone to instability during long-term operation, and is committed to realizing the operation Maintain the stability of aerobic granular sludge in the process, in order to give full play to the advantages of high efficiency and low consumption of aerobic granular sludge reactor in sewage treatment, and provide technical support for the practical application of aerobic granular sludge technology

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