Sewerage treatment method by using precoated dynamic membrane to filter mixed liquor of activated sludge

A sewage treatment method and activated sludge technology, which is applied in the field of environmental engineering, can solve the problems of difficult membrane fouling and high cost of membrane modules, and achieve the effects of low cost, low compressibility, and improved filtration accuracy

Inactive Publication Date: 2005-01-12
DALIAN UNIV OF TECH
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Problems solved by technology

This new sewage treatment method not only has all the advantages of membrane bioreactors, but also can fundamentally solve the problems...

Method used

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  • Sewerage treatment method by using precoated dynamic membrane to filter mixed liquor of activated sludge
  • Sewerage treatment method by using precoated dynamic membrane to filter mixed liquor of activated sludge

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Embodiment

[0016] Treatment of domestic sewage water volume according to 45m 3 / d meter, COD concentration is 600mg / l. The flux of a single pre-coated dynamic membrane module is maintained at 80L / h m 2 , filter area is 3m 2 , with a single-sided area of ​​1.5m 2 , the specific dimensions are: height 1.5m, length 1.0m, then it is calculated that 8 filter components are required. Get a single filter assembly and place it in the pre-coating pool 9, which contains clear water and adds a pre-coating agent, which uses powdered activated carbon. The thickness of the pre-coating dynamic film is calculated as 1mm, so each filter module needs 3L of pre-coating agent. Turn on the mixer 11 to mix the pre-coating agent evenly, the suction pump 12 sucks the water out, and the water out circulates back to the pre-coating tank 9 . Circulate for 25 minutes to form a uniform pre-coated dynamic film on the surface of the filter assembly.

[0017] Eight pre-coated dynamic membrane modules 3 are instal...

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Abstract

The characteristics are: industrial filter cloth is used to make filter component, precoat method is used to form a dynamic film on surface of the industrial filter cloth to improve filter performance. The precoating dynamic film component is fixed on frmae in biologic reactor, water flows out by action of sorption pump. The dynamic film has absorbing and intercepting action to pollution substances, and can prevent that pollution substances and microbe spreading to the surface an interior of filte cloth fibre, precoating agent particle has large particle size, so the dynamic film formed by it has high porosity, small compressibility and strong liquid phase permeability, thus to delay the enhancement of operation pressure.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering and relates to sewage treatment and reclaimed water reuse technology, in particular to a sewage treatment method using a pre-coated dynamic membrane to filter activated sludge mixed liquid. Background technique [0002] my country is one of the 13 water-poor countries in the world. More than 400 of the more than 600 cities are short of water. The industrial output value reduced by water shortage exceeds 120 billion yuan per year. Using reclaimed water with lower water quality and price than drinking water for greening, washing cars, and flushing sanitary appliances can save precious water resources, ease the contradiction between supply and demand of urban water, and reduce the burden on urban drainage systems. Membrane bioreactor (membrane bioreactorMBR) is considered to be one of the most promising sewage treatment and reuse technologies. It can replace the three processes of a...

Claims

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Application Information

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IPC IPC(8): C02F3/10C02F3/12
CPCY02W10/10
Inventor 张捍民杨凤林张兴文
Owner DALIAN UNIV OF TECH
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