Surface flow-horizontal undercurrent composite manpower wetland system

A technology of constructed wetland system and horizontal subsurface flow, which is applied in the field of submerged plant type surface flow-horizontal subsurface flow composite constructed wetland purification system, and can solve problems such as not seen

Inactive Publication Date: 2009-07-15
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although submerged plant-type surface flow constructed wetlands have excellent oxygenation and nitrification effects, and are not prone to clogging, combining them with horizontal subsurface flow constructed wetlands in anaerobic environments can form a combination of anaerobic and aerobic environments (with Similar to the A / O process of urban sewage), it can effectively remove pollutants, and has the advantages of low construction and operation costs. It is of great practical significance to apply it to wastewater nitrogen and phosphorus removal. However, this composite constructed wetland system is not currently available. not seen

Method used

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  • Surface flow-horizontal undercurrent composite manpower wetland system

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Embodiment approach

[0015] The surface flow-horizontal subsurface flow composite constructed wetland system of the present invention makes full use of the advantages of the surface flow-horizontal subsurface flow combination and the characteristics of submerged plants to strengthen the removal effect of pollutants, such as figure 1 As shown, after preliminary sedimentation, the sewage 1 flows through the submerged plant type surface flow constructed wetland unit 2 and the horizontal subsurface flow constructed wetland unit 3 sequentially in a push flow manner, after which the water quality is purified and flows out of the combined constructed wetland to form effluent 4.

[0016] In the surface flow constructed wetland unit 2, local dominant submerged plants 5 are planted, and a large-capacity deammonization nitrogen filler—zeolite 6 is added to the bed, and phosphorus, SS, and some organic pollutants in water are removed under the combined action of fillers, plants, and microorganisms At the same ...

Embodiment 1

[0019] The discharge of a certain river is 5000m 3 / d, the water quality indicators are shown in Table 1, and the compound constructed wetland system of the present invention is used for treatment, wherein the average width of the submerged plant type surface flow constructed wetland unit is 40m, the water depth is about 1-1.2m, and the length of the test area is 65m. The flow rate is controlled in the form of partitions, and the width of the river is divided into 8 corridors by the partitions to control the water flow rate of about 0.5m / s. Hornwort algae are planted, and zeolite (5-10cm) is added to the filler, and the residence time is 2d. Reeds are planted in the horizontal subsurface flow constructed wetland unit. The water depth is about 1.5m, the width is 40m, and the length of the test area is 110m. Calcite is added to the filler, and the residence time is 1d. The effluent water quality indicators are shown in the table.

[0020] Table 1 Index value (mg / L) of a certain...

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Abstract

The invention provides a compound manual marsh system formed by the combination of surface flow and horizontal subsurface flow of a sunken plant type according to different oxygen dissolving environments and different oxygenizing effects of emergent aquatic plants, sunken plants, floating plants and other aquatic plants in the surface flow constructed wetland horizontal subsurface flow constructed wetland. Sunken plants are planted on a surface flow constructed wetland processing bed unit to increase the oxygen dissolving concentration of the unit and reinforce the nitrification of the unit, and the horizontal subsurface flow constructed wetland can easily form an anaerobic environment. The manual marsh environment of anaerobic and aerobic alternation can be formed by combining the two kinds of constructed wetlands together to be helpful for the step removal of nitrogen and phosphor.

Description

technical field [0001] The invention relates to the fields of environmental engineering and ecological engineering, in particular to a submerged plant type surface flow-horizontal subsurface flow composite artificial wetland purification system for controlling eutrophication pollution. Background technique [0002] In recent years, with the increasing discharge of industrial sewage and urban domestic sewage, the degree of eutrophication of water bodies has been deepening. As an ecological engineering eutrophication water treatment technology, constructed wetland can simultaneously remove nitrogen, phosphorus, suspended solids, BOD, E. coli and heavy metals and other pollutants. Strong impact load resistance and aesthetic value. According to the way of water flow, constructed wetlands are usually divided into three categories: surface flow constructed wetlands, horizontal subsurface flow constructed wetlands and vertical subsurface flow constructed wetlands. The surface flo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F3/30
CPCY02W10/10
Inventor 郑少奎杨志峰王长伟
Owner BEIJING NORMAL UNIVERSITY
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