Anti-blocking method for artificial wetland

A constructed wetland and anti-clogging technology, applied in the field of water treatment, can solve problems such as easy clogging

Inactive Publication Date: 2010-06-09
FUDAN UNIV
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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 provide an efficient anti-clogging method for constructed wetland water treatment to solve the problem of easy clogging in the operation of traditional wetland systems

Method used

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Embodiment 1

[0012] The effluent of a domestic sewage plant has a COD concentration of about 50~80mg / L, ammonia nitrogen of 2.0~5.0mg / L, total phosphorus of 0.5mg / L, and total nitrogen of 10~15mg / L. After being treated by this process, it is discharged into In the source of drinking water, the height of the infiltration dam is 1.0m, the hydraulic retention time is 6 hours, the height of the wetland system is 0.6m, and the surface hydraulic load is 0.3m3 / m2.d. The effluent meets the "Surface Water Environmental Quality Standard" (GB3838-2002) Class IV water standard, effluent COD is less than about 30mg / L, ammonia nitrogen ≤1.50mg / L, total phosphorus ≤0.3mg / L and total nitrogen ≤1.5mg / L.

Embodiment 2

[0014] The effluent from an industrial sewage plant has a COD concentration of about 100mg / L, ammonia nitrogen of 10.0mg / L, total nitrogen of 15mg / L, total phosphorus of 3mg / L, and a concentration of suspended solids of 80mg / L. The height of the filter dam is 1.0m, the hydraulic retention time is 4 hours, the height of the wetland system is 0.6m, and the surface hydraulic load is 0.3m3 / m2.d. The effluent reaches the first-class B standard in GB18918-2002.

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Abstract

The invention belongs to the technical field of water treatment, and particularly discloses an anti-blocking method for an artificial wetland. The method is mainly to arrange a percolation dam A unit in front of a wetland system B unit, wherein the inside of the percolation dam A unit is provided with a filtering flashboard (1) made of textile material, a bio-packing filtration layer (2), an anti-permeability bottom (4) and a covering layer (3); and the wetland system B unit can be one or the series connection or the parallel connection of more of three wetlands such as a surface flow wetland, a subsurface flow wetland, a vertical flow wetland and the like. The treatment flow is that sewage is treated by the percolation dam A unit first, and then an effluent enters the wetland system B unit for further treatment. Compared with a conventional method, the method can conveniently solve the problem of easy blocking during the operation of wetland systems.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a method and device for sewage treatment or water purification treatment, in particular to a sewage treatment method for constructed wetlands. Background technique [0002] The existing artificial wetlands mainly have three types of surface flow, subsurface flow and vertical flow. In actual engineering, after a period of operation, the above-mentioned wetlands are prone to blockage. From the growth curve of microorganisms, it can be seen that the specific growth rate of microorganisms is closely related to the specific consumption rate of substrates. At the water inlet end of wetlands rich in nutrients, microorganisms growing on fillers grow faster because of the rich substrates. , It is easy to cause blockage of the water inlet end of the wetland. Once the wetland treatment system is blocked, it will cause problems such as uneven water distribution and short flow, which w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/32C02F3/34
CPCY02W10/10
Inventor 何坚郑正王寿兵张继彪罗新刚周亮
Owner FUDAN UNIV
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