Membrane aeration bioreactor-granular sludge integrated sewage treatment device and method

Abstract

The invention relates to a membrane aeration bioreactor-granular sludge integrated sewage treatment device and a membrane aeration bioreactor-granular sludge integrated sewage treatment method. The device comprises a reaction tank body, an isolation plate, a hollow fiber membrane module, aerobic granular sludge and a pipe gallery structure, the isolation plate is arranged in the reaction tank body and divides the reaction tank body into a first reaction cavity and a second reaction cavity, the hollow fiber membrane module is arranged in the first reaction cavity, the aerobic granular sludge is arranged in the second reaction cavity, and a water passing opening is formed between the top end of the isolation plate and the reaction tank body; the pipe gallery structure comprises a water inlet pipe, a water outlet pipe, an oxygen supply device and an aeration device, the water inlet pipe is connected into the first reaction cavity, the oxygen supply device is communicated with the hollow fiber membrane module, the water outlet pipe is internally connected above the aerobic granular sludge in the second reaction cavity, and an aeration port of the aeration device is located below the aerobic granular sludge in the second reaction cavity. The effluent turbidity is lower, the water quality is better, and a secondary sedimentation tank and a sludge backflow system do not need to be arranged.

Description

technical field [0001] The disclosure relates to the technical field of sewage treatment, in particular to a membrane aeration bioreactor-granular sludge integrated sewage treatment device and method. Background technique [0002] Membrane aerated bioreactor is a new type of biofilm combination process, in which the "membrane" is usually a hollow fiber membrane, the surface of the hollow columnar membrane filament is covered with biofilm, and the outside of the biofilm is a liquid phase composed of raw water to be treated. The "membrane" not only provides aeration but also serves as the carrier of the biofilm; in actual use, oxygen diffuses into the biofilm through the membrane / biofilm interface, making the biofilm form an aerobic layer, anoxic layer, The oxygen layer, while the pollutants in the raw water enter the biofilm reversely through the biofilm / liquid phase interface, the heterogeneous mass transfer of oxygen and substrate makes the biofilm function reasonably strat...

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Problems solved by technology

[0003] At present, membrane aerated bioreactors usually replace biofilters as the secondary sewage treatment unit in practical applications; The content of suspended solids is high, and a secondary settling tank must be added at the rear end; if you want to overcome the above defects, you need to consider improving the design of the membrane aerated bioreactor

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