Immersed type anaerobic membrane bioreactor capable of effectively controlling membrane pollution and treatment method

An anaerobic membrane biology and reactor technology, applied in anaerobic digestion treatment and other directions, can solve the problems of serious membrane fouling, large floor space, difficult membrane cleaning, etc., to reduce membrane fouling, reduce pollution, and strengthen processing capacity. Effect

Inactive Publication Date: 2015-12-02
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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Problems solved by technology

Anaerobic MBR can be divided into separate anaerobic MBR and integrated anaerobic MBR. The separate type is helpful for equipment cleaning, replacement and addition, but it occupies a large area and the shear force generated by the high-speed rotation of the circulating pump will Inactivate some microorganisms; install the membrane module and the reactor together in one piece, reduce the floor space and allow the microorganisms to accumulate more effectively, but there are problems such as serious membrane fouling and difficult membrane cleaning

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  • Immersed type anaerobic membrane bioreactor capable of effectively controlling membrane pollution and treatment method

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Embodiment 1

[0033] A submerged anaerobic membrane bioreactor for effectively controlling membrane fouling (see figure 1 ), the top of the bioreactor is provided with a biogas collection device 7, and the bottom is provided with a sludge discharge pipe 11. The interior of the reactor includes a membrane module 2, a three-phase separator 4 and a main reaction zone 5 from top to bottom; The bottom is provided with a water inlet pipe 6, the upper part of the three-phase separator 4 is connected to a gas distribution device 10, the upper part of the membrane module 2 is provided with a water outlet pipe 8, and the lower part is provided with a flushing pipe 1.

[0034] The membrane module is located on the upper part of the three-phase separator, after the purification of the main reaction zone and the separation of the three-phase separator, the waste water is relatively clear, so the pollution to the membrane module can be reduced.

[0035] The upper part of the three-phase separator is conn...

Embodiment 2

[0041] The main reaction zone of the submerged anaerobic membrane bioreactor that effectively controls membrane fouling is an upflow sludge bed reactor (UASB), which is cylindrical and has a height-to-diameter ratio of 3-8. The membrane module is a flat ultrafiltration membrane with a pore size of 0.03-0.06 μm.

[0042] The reactor is inoculated with anaerobic sludge and acclimatized, and the acclimatization period is 2-3 months; when the COD removal rate of the effluent reaches 85-95%, the acclimatization ends and is ready for use.

[0043] Wastewater treatment method:

[0044] The domestic sewage is pumped in through the water inlet pipe, transported to the main reaction area, and then passes through the three-phase separator together with the generated gas, and the separation of sludge, water and gas is realized in the three-phase separator; wherein, the generated gas undergoes three-phase separation After being separated by the filter, it is collected by the gas distribut...

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Abstract

The invention relates to a membrane bioreactor, in particular to an immersed type anaerobic membrane bioreactor capable of effectively controlling membrane pollution and a treatment method. A methane collection device is arranged at the top end of the bioreactor; a sludge discharge pipe is arranged at the bottom of the bioreactor; the bioreactor internally comprises a membrane component, a three-phase separator and a main reaction zone from top to bottom sequentially; a water inlet pipe is arranged at the bottom of the bioreactor; a gas distribution device is arranged at the upper part of the three-phase separator; a water outlet pipe and a washing pipe are all connected with the membrane component. By adopting the membrane bioreactor provided by the invention, membrane pollution can be reduced effectively, the service life of a membrane is prolonged, the treatment capacity of the anaerobic membrane bioreactor to pollutants is enhanced and in-situ flushing of the membrane component is realized.

Description

technical field [0001] The invention relates to a membrane bioreactor, in particular to a submerged anaerobic membrane bioreactor and a treatment method for effectively controlling membrane fouling. Background technique [0002] Membrane bioreactor (MBR) is a new wastewater treatment technology that combines membrane separation technology and biological treatment technology. It utilizes the interception effect of the membrane separation equipment to effectively remove pollutants while retaining macromolecular organic matter in the reactor, which overcomes the phenomenon of biomass loss in traditional biological treatment technologies. According to different types of membrane bioreactors, it can be divided into aerobic MBR and anaerobic MBR. Among them, aerobic MBR is mainly used in wastewater with low organic load and high-efficiency biochemical reaction. For industrial wastewater with high organic load, its application process Medium aeration consumes too much energy, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28
Inventor 张杨颜丙花周苗苗邵梅生许敏
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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