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

Abstract

The invention discloses a method for maintaining operation stability of an AGS reactor based on particle size control. The method comprises the following steps: taking a certain volume of a mud-watermixed solution in the reactor in the aeration state after the AGS reactor realizes aerobic granulation, successively screening from standard sieves with large to small pore sizes to obtain AGS with different particle-size ranges and fixing volumes to the same volume; crushing AGS with fixed volumes by using an ultrasonic cell crusher respectively, measuring the granulation rate of crushed sludge respectively, wherein the largest granulation rate is the particle-size interval with optimal stability; then screening the mud-water mixed solution in the reactor periodically, carrying out reflux oncollected AGS of the optimal particle-size range to the reactor, and storing AGS of other particle sizes for later use, thereby gradually increasing the mass ratio of AGS in the particle-size range with the optimal stability. The method for maintaining the operation stability of the AGS reactor based on the particle size control disclosed by the invention can maintain the stability of the AGS reactor in operation for a long time to realize high-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...

AI Technical Summary

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

Images