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Split type film biological reactor and water treatment method

A technology of membrane bioreactor and bioreactor, applied in the direction of biological water/sewage treatment, sustainable biological treatment, chemical instruments and methods, etc., can solve the problem of high energy consumption in operation, reduce water cycle energy consumption, and be easy to clean , the effect of small energy

Inactive Publication Date: 2002-07-17
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantage of high energy consumption in the operation of the known split membrane bioreactor, and to create a membrane separator unit that uses air blowing in the shallow water layer for membrane flushing, which can effectively reduce the energy consumption per unit of water treatment, thereby reducing Split membrane bioreactor technology for unit water treatment cost

Method used

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  • Split type film biological reactor and water treatment method
  • Split type film biological reactor and water treatment method
  • Split type film biological reactor and water treatment method

Examples

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Effect test

Embodiment 1

[0013] A scale of 24m 3 / d The wastewater reuse project in residential areas adopts the known cross-flow split membrane bioreactor technology and the membrane bioreactor technology of the present invention for flushing the shallow water layer with aerated membranes.

[0014] Known cross-flow split-type membrane bioreactor: the membrane surface flow rate of the membrane separation unit is 3.6m / s, and the energy consumption per unit of water treatment is 3.0kW·h / m 3 .

[0015] Adopting the split-type membrane bioreactor technical scheme of the present invention, that is, adopting the split-type membrane bioreactor technology in which the membrane is flushed by blowing air in the shallow water layer in the membrane filter tank. The water depth of the bioreactor is 3 meters, the length of the membrane module is 1 m, that is, the distance from the upper edge of the upper water collecting pipe 31 to the lower edge of the lower water collecting pipe 32 is 1 m, and the water depth of...

Embodiment 2

[0017] A scale of 24m 3 / d Preliminary analysis and comparison of operating energy consumption of the sewage reuse project in residential areas using the known submerged split-type membrane bioreactor technology and the split-type membrane bioreactor technology of the present invention.

[0018] Known submerged split-type membrane bioreactor: the water depth of the bioreactor is 3m, and the length of the membrane module is 1m, that is, the distance from the upper edge of the upper water collection pipe 31 to the lower edge of the lower water collection pipe 32 is 1m. The air-water ratio is 40:1, that is, the total blowing volume is 40m3 / h, treatment water volume 1m 3 / h, the blowing pressure is about 30kPa, the blowing efficiency is 0.44, and the energy consumption per unit of water treatment is 0.7kW·h / m 3 , water supply, circulation and aeration energy consumption 0.4kW h / m 3 , the energy consumption per unit of water treatment is 1.1kW·h / m 3 .

[0019] Adopting the sp...

Embodiment 3

[0021] A scale of 24m 3 / d Preliminary analysis and comparison of operating energy consumption of the sewage reuse project in residential areas using the known submerged split-type membrane bioreactor technology and the split-type membrane bioreactor technology of the present invention.

[0022] Known submerged split-type membrane bioreactor: the water depth of the bioreactor is 3m, and the length of the membrane module is 1m, that is, the distance from the upper edge of the upper water collection pipe 31 to the lower edge of the lower water collection pipe 32 is 1m. The air-water ratio is 40:1, that is, the total blowing volume is 40m 3 / h, treatment water volume 1m 3 / h, the blowing pressure is about 30kPa, the blowing efficiency is 0.44, and the energy consumption per unit of water treatment is 0.7kW·h / m 3 , water supply, circulation and aeration energy consumption 0.4kW h / m 3 , the energy consumption per unit of water treatment is 1.1kW·h / m 3 .

[0023] Adopting the ...

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Abstract

The present invention provides a split type membrane biological reactor, including grizzly screen or screen mesh, regulating reservior, biological reactor and membrane filter tank, and is characterized by that the bottom portion of membrane filter tank is mounted on the foundation or supporting frame, the static water levels of membrane filter tank and biological reactor are identical, and the mounting depth of air blast pipe and membrane flushing air blast pipe in the biological reactor and in the membrane filter tank is in the water layer of range from water surface of waste depth with 2.5m. Said invented membrane biological reactor possesses the advantage of low energy consumption for operation.

Description

technical field [0001] The invention belongs to the technical field of membrane bioreactors, in particular to split membrane bioreactors. Background technique [0002] A known split-type membrane bioreactor is a cross-flow membrane bioreactor system, which is composed of a bioreactor unit and a cross-flow membrane separator. It mainly has the technical problem of high energy consumption per unit of water treatment. In order to maintain a stable water permeability, cross-flow membrane separators require higher membrane surface flow to generate greater shear force or turbulent flow to limit the thickness of the filter cake layer. The higher membrane surface flow requires a larger circulating water pump. The working pressure provided by the pump is usually 100-150kPa. The ratio of the circulating water volume to the permeable water volume of the membrane separator is as high as 100-600:1, and the circulating water flow rate is generally 1- 7m / s, generally greater than 2m / s. S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/02C02F3/10C02F9/08
CPCY02W10/10
Inventor 樊耀波
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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