Device and method for rapid cultivation of aerobic granular sludge based on sludge-age control

Abstract

The invention discloses a device and method for rapid cultivation of aerobic granular sludge based on sludge-age control. The device comprises a water inlet unit, a reactor body, an aeration unit, a drainage unit, a sludge discharging unit and a control unit. The reactor body is a columnar double-layer cylinder, an inner cylinder serves as a reaction area, an area between the inner cylinder and an outer cylinder serves as a sludge storage area, a water outlet in the inner cylinder is connected with a sludge opening of the sludge storage area through a pipeline with a first solenoid valve, and the bottom of the outer cylinder of the sludge storage area is provided with a sludge discharging pipe with a second solenoid valve. The device for the rapid cultivation of the aerobic granular sludge has the advantages that the sludge age is easily and effectively controlled and the occupied area of a reactor is reduced, the running mode of controlling the sludge age during sludge discharging can be achieved, and the problem is solved that sequencing batch reactors (SBR) easily lose stability under the condition of not regulating the sludge age.

Description

technical field [0001] The invention relates to a device and method for rapid cultivation of aerobic granular sludge based on sludge age control, and belongs to the technical field of wastewater biological treatment. Background technique [0002] In 1991, Mishima et al. discovered the self-coagulation phenomenon of aerobic activated sludge in a continuous flow AUSB reactor. Aerobic granular sludge is a self-fixed form of microorganisms formed spontaneously under aerobic conditions. It has excellent settling performance, high biological retention, low sludge yield and resistance to organic load impact, which greatly compensates for the traditional Disadvantages of the activated sludge process. The first aerobic granular sludge seminar held in Munich, Germany in 2005 made a clear definition of it. It is believed that aerobic granular sludge is a microbial aggregate whose particles do not agglomerate with the reduction of hydraulic shear force and have Compared with the faste...

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Problems solved by technology

[0003] However, the aerobic granular sludge currently operating in the SBR reactor cannot be effectively controlled due to the fact that the sludge age cannot be effectively controlled, so that a large amount of sludge is discharged during the operation of the reactor, resulting in the loss of functional flora, the disorder of microbial metabolism in the system, and the effects of nitrification and denitrification Inhibited, affecting the stability of the particle structure, further causing the irreversible instability of the reactor, restricting its industrial application

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