Internal recycle anaerobic membrane bioreactor with single reaction area

Abstract

The invention discloses an internal recycle anaerobic membrane bioreactor with a single reaction area. The anaerobic membrane bioreactor comprises a reactor main body, a water (sludge) inlet pipe, a water outlet pipe, an upwelling pipe, a downwelling pipe, a sludge outlet pipe and a methane pipe. A partition plate is arranged in the reactor main body and divides the interior of the reactor main body into an upper part and a lower part, namely a reaction area; the upper part is provided with a second partition plate which divides the upper part into a downwelling area and a membrane module area; and the membrane module area is provided with a membrane module. Membrane pollution is removed by a gas and water backwashing system through methane. Due to the adoption of the membrane module, the volume of the membrane module is smaller than that of the conventional sedimentation area, so the total volume of a reactor is reduced. During treatment of wastewater, the membrane module is a stainless steel micro filtration membrane of which the thickness is 10 to 50 microns; and the granular sludge concentration in the reactor can reach over 60gSSL<-1>, and organic load can reach over 35kgCODm<-3>d<-1> during treatment of starch wastewater. When sludge is digested, a non-woven micro filtration membrane of which the thickness is 1 to 2 microns is adopted, and the residence time can be shortened to be within 15 days.

Description

technical field [0001] The invention relates to an internal circulation anaerobic membrane biological reactor, which belongs to the technical field of anaerobic treatment of waste water and sludge. Background technique [0002] The internal circulation anaerobic reactor of a single reaction zone is a high-efficiency anaerobic reactor developed on the basis of a large number of internal circulation anaerobic reactors currently under construction. figure 1 shown. The waste water enters the reaction zone 2 through the water inlet pipe 1a at the bottom of the reactor, and most of the organic matter is removed in the reaction zone 2. After the wastewater is treated, it is deposited in the sedimentation zone 8 and then discharged. Its internal circulation system includes a riser pipe 4 and a downflow pipe 7, and uses biogas to lift part of the fluid in the reaction zone 2 to the gas-liquid separator 5. After the biogas escapes, the fluid returns to the downflow pipe 7 under the ...

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Problems solved by technology

[0006] The object of the invention is to propose a single reaction zone internal circulation anaerobic membrane bioreactor, to overcome the problems of the internal circulation anaerobic reactor mud running and internal circulation sludge anaerobic digester mud water separation difficulties in the single reaction zone, The reactor can not only retain the advantages of high efficiency and less land occupation of the internal circulation anaerobic reactor, but also overcome the problem of sludge loss, the reactor operation is more stable, and the reactor volume is smaller

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