Sewage treatment device with membrane bioreactor and sewage treatment method
A membrane bioreactor and sewage treatment device technology, applied in the direction of biological water/sewage treatment, sustainable biological treatment, water/sewage multi-stage treatment, etc., can solve the problem of high energy consumption of external MBR sewage treatment devices, and achieve energy efficiency Low consumption and high aeration efficiency
Active Publication Date: 2013-05-01
CHINESE ACAD OF AGRI MECHANIZATION SCI
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is to propose a membrane bioreactor sewage treatment device and sewage treatment method to solve the defect of high energy consumption of the external MBR sewage treatment device
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[0036] The invention adopts an injector to aerate the activated sludge in the bioreactor by utilizing the remaining energy of the concentrated sewage with a certain pressure and flow rate at the outlet of the ultrafiltration membrane, and can effectively eliminate the foam at the outlet of the exhaust pipe of the bioreactor. Wherein, the injector is the abbreviation of Venturi tube, and in the present invention, the liquid enters from the inlet of the Venturi tube, and is discharged through a nozzle with a very small section. As the cross-section gradually decreases, the pressure of the liquid increases, and the flow velocity also increases. At this time, a vacuum is generated in the inlet of the attached chamber of the mixing chamber, so that the surrounding air is sucked into the Venturi tube, mixed with the liquid, and then slowed down and decompressed through the diffuser tube to achieve the purpose of gas-liquid mixing.
[0037] image 3 It is the schematic diagram of me...
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The invention brings forward a sewage treatment device with a membrane bioreactor and a sewage treatment method. The device provided by the invention comprises a circulating water pump, an ultrafilter membrane, a bioreactor, an injector and an exhaust pipe, wherein the ultrafilter membrane is disposed on the outer portion of the bioreactor; one end of the ultrafilter membrane is connected with the bioreactor and the other end of the ultrafilter membrane is connected with the circulating water pump; the circulating water pump is connected with the bioreactor; The injector is arranged inside the bioreactor; the injector communicates with the end which connects the ultrafilter membrane and the bioreactor so as to inject the sewage filtered through the ultrafilter membrane into the bioreactor; the exhaust pipe is connected with the bioreactor and communicates with the injector by an external communicating pipe. According to the invention, residual energy of concentrated sewage with certain pressure and flow velocity on the outlet of the filter membrane is utilized to oxygenate activated sludge in the bioreactor, and foams on the outlet of the bioreactor's exhaust pipe can be effectively eliminated.
Description
technical field [0001] The invention relates to a sewage treatment device, in particular to an external membrane bioreactor (MBR) sewage treatment device and method. Background technique [0002] MBR technology is a sewage treatment technology that combines biological treatment and membrane filtration. According to the position where the membrane is placed, it can be divided into external type and internal type. [0003] figure 1 It is a schematic diagram of the structure of the built-in MBR, such as figure 1 As shown, the built-in membrane process is to place the filter membrane 10 in the bioreactor 20, the sewage enters the bioreactor 20 from the pipeline a, uses the self-priming pump 30 to suck the filter membrane to filter the sewage, and aerates the membrane through the blower 40. The surface is flushed, the water is discharged from the water outlet gap, the sludge is output from the bottom pipeline b, and the filtered permeate is output from the C pipeline. The pro...
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IPC IPC(8): C02F9/14C02F1/44C02F3/12
CPCY02W10/10
Inventor 李树王志刘艳阳
Owner CHINESE ACAD OF AGRI MECHANIZATION SCI