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Sewage treatment method

A sewage treatment method and sewage technology, which are applied in the fields of water/sewage multi-stage treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc. The problem of high cost, to achieve the effect of low operating cost, less land occupation, convenient operation and management

Inactive Publication Date: 2010-02-10
CISDI ENG CO LTD
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Problems solved by technology

[0003] The current chemically enhanced flocculation treatment process has high chemical costs and is not suitable for small towns; while ordinary biological treatment consumes high energy due to its high aeration requirements, it is not suitable for small towns

Method used

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Embodiment Construction

[0011] The present invention is described in detail in conjunction with accompanying drawing:

[0012] Processing scale: 250m 3 / d; Treatment according to the technological process of the present invention: pretreatment - biological enhanced flocculation treatment - variable speed biological filter treatment - artificial wetland treatment - discharge or reuse of effluent up to standard.

[0013] A. Pretreatment: The sewage passes through the grid to remove larger solid impurities, and then enters the sand setting adjustment tank for sand settling and homogenization of water quality and quantity;

[0014] B. Bio-enhanced flocculation treatment: The raw sewage water is mixed with the return sludge through the biological flocculation tank, and after the flocculation adsorption reaction, the solid-liquid separation is realized in the secondary sedimentation tank;

[0015] C. Variable speed biological filter treatment: biological removal and physical filtration of sewage;

[0016...

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Abstract

The invention belongs to fields of environmental protection science and engineering, and in particular relates to a sewage treatment method, namely a sewage treatment method combining biological reinforced flocculation, speed-changing biofilters and artificial wetlands. Sewage is pretreated and is treated by the biological reinforced flocculation, then is treated by the speed-changing biofilters,and finally is treated by the artificial wetlands; and yielding water accords to a standard and is discharged or recycled, partial sludge flows to a flocculation pond reversely, and the residual sludge is discharged from the bottom of a settling pond. The sewage treatment method is combination process technology for sewage treatment, which is suitable for the sewage treatment of small towns and has less land occupation, investment saving, low operating cost, high efficiency and convenient operation and management, and can be widely applied to the sewage treatment.

Description

technical field [0001] The invention belongs to the field of environmental protection science and engineering, and particularly relates to a sewage treatment method, that is, a sewage treatment method combining biologically enhanced flocculation, a variable-speed biological filter, and an artificial wetland. technical background [0002] At present, the sewage treatment facilities of large and medium-sized cities in the Three Gorges reservoir area are becoming more and more perfect, which has improved the quality of urban water environment to a certain extent, but the construction of sewage treatment facilities in small towns widely distributed in the reservoir area is seriously lagging behind. In order to ensure the quality of water environment in the Three Gorges Reservoir area, it is urgent to develop a sewage treatment technology suitable for small town sewage treatment that occupies less land, saves investment, low operating costs, high efficiency, and convenient operati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/52C02F3/32C02F3/12
Inventor 张晓卫蒲军毅江开伟刘耀明肖怀德李翔林程保
Owner CISDI ENG CO LTD
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