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Membrane bioreactor device and sewage treatment method for slowing down membrane fouling

A technology of membrane bioreactor and membrane pollution, applied in biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc., can solve the problems of high energy consumption for aeration and cleaning, membrane surface pollution, etc. Achieve the effects of reducing aeration energy consumption, restoring flux, and slowing down membrane fouling

Active Publication Date: 2016-08-24
LIAONING BEIFANG ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of serious membrane surface pollution and high energy consumption for aeration and cleaning in traditional membrane bioreactors, the present invention provides a membrane bioreactor device and sewage treatment method for slowing down membrane fouling

Method used

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  • Membrane bioreactor device and sewage treatment method for slowing down membrane fouling
  • Membrane bioreactor device and sewage treatment method for slowing down membrane fouling

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specific Embodiment approach 1

[0035] Specific Embodiment 1: The membrane bioreactor device for slowing membrane fouling of this embodiment includes: sewage lifting pump 1, regulating tank 2, membrane bioreactor 3, perforated water distributor 4, aerator 5, aerator Air gas flow meter 6, aeration fan 7, vent / sludge valve 8, filler 9, closed gate valve 10, three-phase separator 11, air guide pipe 12, closed gate valve 2 13, ultrasonic vibration box 14, membrane module 15, Ultrasonic generator 16, rotating motor 17, pressure gauge 18, suction water pump 19, abortion water flow meter 20, production water tank 21, chemical cleaning agent storage tank 22, backwash water pump 23, backwash water pipeline 1 24, backwash Water pipeline two 25 and a plurality of connecting pipelines and valves; the membrane bioreactor 3 is a hollow container, in the membrane bioreactor 3, the lower part is provided with a perforated water distributor 4, the middle part is provided with a three-phase separator 11, and the upper part is ...

specific Embodiment approach 2

[0039] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the perforated water distributor 4 adopts a porous water distribution method, and a general water distribution pipe is arranged along the bottom of the membrane bioreactor, and water distribution horizontal pipes are arranged at intervals. Open holes at equal intervals on the pipe, the diameter of the water distribution pipe is 50-100cm, the center of the water distribution pipe is 20-25cm from the bottom, and the hole diameter is 15-25mm.

[0040] The aerator 5 adopts a fixed plate microporous aerator with a diameter of 200 mm, an average pore diameter of 100-200 μm, a porosity of 40-50%, an oxygen utilization rate of 20-25%, and a service area of ​​0.3-0.75 m 2 / indivual. Others are the same as the first embodiment.

specific Embodiment approach 3

[0041] Embodiment 3: This embodiment differs from Embodiments 1 to 2 in that: the bottom of the membrane bioreactor 3 is an inverted truncated cone structure, and the sludge residence time is controlled by the vent / sludge valve 8 for 5-30 days. Others are the same as the specific embodiment 1 to 2.

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Abstract

The invention provides a membrane bioreactor device for retarding membrane pollution and a sewage treatment method. The membrane bioreactor device is characterized in that a three-phase separator is arranged in a membrane bioreactor, and a sewage treatment device with a membrane reaction zone at the upper part and a contact oxidation zone at the lower part is formed; sewage enters the contact oxidation zone from the bottom of the reactor and then enters the membrane reaction zone from a slit of the three-phase separator; under the combined action of the absorption of activated sludge and the interception of membranes, the treatment of the sewage is realized; with the adoption of a rotating membrane filtering component, the rotating shear force is increased to retard the membrane pollution, and meanwhile, the fact that all the membranes have uniform cleaning strength is guaranteed, and cleaning dead corners are reduced; the three-phase separator is connected with a gas guide tube, so that residual gas in the contact oxidation zone is guided into the membrane reaction zone at the upper part to be used as a gas washing source of a membrane component, therefore the energy consumption is reduced; online ultrasonic cleaning and chemical cleaning equipment is arranged to reduce the assembly and disassembly procedures in the membrane cleaning process. The sewage treatment device and method have the advantages of high treatment efficiency, small membrane pollution, stable effluent water quality and good convenience in operation and management.

Description

Technical field: [0001] The invention relates to the field of sewage treatment, in particular to a membrane bioreactor device and a sewage treatment method for slowing membrane fouling. It integrates multiple technologies such as three-phase separation, ultrasonic wave, GHK rotating membrane filtration, and online chemical cleaning. Background technique: [0002] Membrane bioreactor (MBR) is a new type of efficient sewage treatment process, which has attracted widespread attention from all over the world. The high-efficiency interception effect of the membrane makes the microorganisms completely trapped in the reactor, realizes the separation of the hydraulic retention time and the sludge age, and degrades organic matter more effectively; and replaces the secondary sedimentation tank in the traditional process by the membrane separation device, reducing the occupation of land It solves the problems of substandard effluent quality and low reuse rate of reclaimed water caused...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12
CPCC02F3/1268Y02W10/10
Inventor 王阳崔鑫王艳青
Owner LIAONING BEIFANG ENVIRONMENTAL PROTECTION
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