Denitrification aerobic granular sludge sequencing batch reactor and work method thereof

Abstract

The invention provides a denitrification aerobic granular sludge sequencing batch reactor. An aerator system is arranged inside a tank body; a nitrification region is arranged above the aerator system; a denitrification region is arranged under the aerator system; a space from a position under the denitrification region to the tank bottom is a water distribution mixing region; a gas water separator is arranged on the top of the tank body; one end of an upper backflow pipe is connected onto the bottom of the gas water separator; the other end of the upper backflow pipe is positioned in a nitrification region and is provided with a plurality of upper backflow spray heads; one end of a lower backflow pipe is connected to the bottom of the gas water separator; the other end of the lower back flow pipe is connected to a first cross-shaped pipe; a plurality of lower backflow spray heads are arranged on the first cross-shaped pipe. Through the reasonable design of hydraulic power and mass transfer, the air lifting kinetic energy is formed by the density pressure difference generated by a reactor under the aeration work condition; the fluid is downwards discharged to be sprayed out to formcyclone mixing by using the position differences and the pressure differences; the fluid speed is accelerated; the hydraulic shearing power is enhanced; the path and dwell time of the air in the water can be improved; the oxygen utilization rate is improved; the flocculent sludge can be used for starting so as to form aerobic particle sewage.

Description

technical field [0001] The invention relates to a biological denitrification aerobic granular sludge reactor, which belongs to the technical field of biological denitrification aerobic granular sludge, in particular to a Denitrification aerobic granular sludge sequence batch reactor (Denitrification aerobic granular sludge sequence batch reactor) reactor, DAGS-SBR reactor). technical background [0002] Aerobic Granular Sludge (AGS) is a granular activated sludge formed by microbial self-aggregation. Compared with ordinary activated sludge, it is less prone to sludge bulking, has strong impact resistance, and can withstand high The organic load is characterized by the integration of different types of microorganisms (aerobic, facultative and anaerobic microorganisms). The self-aggregation process of microorganisms is a complex physical, chemical and biological process, and its granulation is affected by various environmental factors. To provide suitable hydraulic shear forc...

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Problems solved by technology

However, there are few examples of engineering applications, and even fewer integrated equipment applications

[0006] At present, the traditional batch-type biological aerobic process includes CASS and SBR processes, most of which are pools with concrete structure, the depth of the pool is generally less than 8 meters, the floor area is large, the utilization rate of oxygen is low, and the energy consumption of oxygen supply is high. In the operation of flocculent sludge, the process system cannot provide the hydraulic shear force required to form aerobic granular sludge (AGS), which is likely to cause problems such as load shock, insufficient carbon source, and sludge bulking.

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