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Sewage treatment system and sewage treatment method of anaerobic fluidized bed-micro aerobic membrane bioreactor

A membrane bioreactor and sewage treatment system technology, applied in the field of sewage treatment system, can solve the problems of high energy consumption and large floor space, and achieve the effects of low energy consumption, small floor space and compact system structure

Active Publication Date: 2012-08-22
NAT ENG RES CENT OF URBAN WATER RESOURCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of large occupied area and high energy consumption in the existing aerobic activated sludge process, and provides a sewage treatment system and method

Method used

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  • Sewage treatment system and sewage treatment method of anaerobic fluidized bed-micro aerobic membrane bioreactor
  • Sewage treatment system and sewage treatment method of anaerobic fluidized bed-micro aerobic membrane bioreactor

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specific Embodiment approach 1

[0015] Specific embodiment one: the sewage treatment system of the anaerobic fluidized bed-microaerobic membrane bioreactor in the present embodiment, it is made up of anaerobic fluidized bed and microaerobic membrane bioreactor connected in series, includes sewage into Water pump 1, anaerobic fluidized bed 2, zeolite carrier 3, three-phase separator 4, gas collection system 5, exhaust valve 6, sludge discharge system 7, return pump 8, water inlet pump 9, membrane bioreactor 10, membrane Component 11, aeration system 12, blower 13, effluent suction pump 16 and clear water tank 17; zeolite carrier 3 fills the middle and lower parts of anaerobic fluidized bed 2, and three-phase separator 4 is arranged above zeolite carrier 3, The collection end of the gas collection system 5 is connected to the gas output end of the three-phase separator 4, the exhaust end of the gas collection system 5 is connected to the upper top of the anaerobic fluidized bed 2, the outlet of the sewage inlet...

specific Embodiment approach 2

[0017] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the system also includes a backwash pump 18, a sewage return pump 14 and a vacuum pressure gauge 15, and the inlet of the backwash pump 18 is communicated with the clear water pool 17. The outlet of the flushing pump 18 penetrates the upper part of the membrane bioreactor 10 and communicates with the cavity of the membrane module 11, and the water outlet on the upper side of the membrane bioreactor 10 communicates with the inlet at the bottom of the anaerobic fluidized bed 2 through the sewage return pump 14 ; The vacuum pressure gauge 15 is set on the water outlet of the membrane module 11 . Other structures and connections are the same as in the first embodiment.

specific Embodiment approach 3

[0018] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the zeolite carrier 3 inside the anaerobic fluidized bed 2 is zeolite with a particle size of 0.5-1mm, and the activated sludge microorganisms are adsorbed on the surface of the zeolite. Finally, a biofilm will be formed on its surface, and the diameter of the entire particle is 2 to 3 mm. Other structures and connections are the same as in the first embodiment.

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Abstract

The invention provides a sewage treatment system and a sewage treatment method of an anaerobic fluidized bed-micro aerobic membrane bioreactor, which aims at solving the problem that an aerobic activated sludge process in the prior art is large in occupied floor space and high in energy consumption. The sewage treatment system is formed by series combination of an anaerobic fluidized bed and a micro aerobic membrane bioreactor, hydrolytic acidification and anaerobic fermentation are performed on sewage firstly through the anaerobic fluidized bed, then the sewage enters the micro aerobic membrane bioreactor, and finally outlet water is discharged in a clean water pool by utilizing a suction pump. The sewage treatment system which is compact in structure, small in occupied area and low in energy consumption and the sewage treatment method are suitable for treatment of urban sewage and industrial sewage containing ammonia nitrogen and organics.

Description

technical field [0001] The invention relates to a sewage treatment system and method. Background technique [0002] At present, most of the sewage treatment plants in my country use the aerobic activated sludge process as the core treatment method. This method needs to provide dissolved oxygen to the sewage to oxidize the organic matter in the sewage into CO 2 , aerobic treatment consumes 0.7-1.3KWh of electricity per kgCOD removal. Under the general situation of energy saving and emission reduction, more attention must be paid to the issue of energy saving and carbon reduction in sewage treatment; Craftsmanship is of great significance. The anaerobic treatment process not only requires less energy provided by the outside world, but also produces energy (such as CH 4 etc., for every 1kgCOD removed, 0.35m 3 CH 4 , the synthetic calorific value is about 21~23MJ / m 3 ). Therefore, the urban sewage treatment process with high-efficiency anaerobic core has a good application...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 丁安梁恒余华荣李圭白
Owner NAT ENG RES CENT OF URBAN WATER RESOURCE
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