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Agricultural ecological canal-artificial wet land water quality improvement and ecological system reconstruction method

A technology for artificial wetlands and water quality improvement, applied in chemical instruments and methods, biological water/sewage treatment, water/sewage multi-stage treatment, etc., can solve problems such as difficult to achieve purification effect, and achieve simple operation management and maintenance, Good water purification effect and convenient construction

Inactive Publication Date: 2007-04-25
INST OF SOIL SCI CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

At present, most of the ditch wetlands (including ecological ditches, ecological interception ditches, etc.) only stay at the level of treating farmland drainage, and it is difficult to achieve the purification effect on the mixed sewage composed of domestic sewage and surface runoff.

Method used

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  • Agricultural ecological canal-artificial wet land water quality improvement and ecological system reconstruction method
  • Agricultural ecological canal-artificial wet land water quality improvement and ecological system reconstruction method

Examples

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Embodiment Construction

[0012] Typical example:

[0013] The middle section of the Daqing River Basin on the north bank of Dianchi Lake is a mixed area consisting of residential areas and agricultural areas. There is no special sewage pipe network built in this area. Rural domestic sewage and a small amount of wastewater from small enterprises are directly discharged to the drainage ditches or main drainage ditches around the village. Finally, the mixed sewage formed by domestic sewage, waste water discharged by small enterprises, surface runoff, garbage, etc., and farmland drainage is discharged into the Daqing River through the main canal. The transformation of branch ditches into ecological ditches with drainage, irrigation and composite sewage purification functions has improved the water quality, but to make the water quality meet the water quality standards for landscape water and agricultural irrigation, it is necessary to transform and ecologically rebuild farmland main canals and pumping stat...

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Abstract

The invention discloses a water quality modifying method of field ecological arterial canal-artificial wetland and reconstructing method of ecological system, which is characterized by the following: predisposing collected rural living effluent and little industrial waste water; flowing in the field ecological arterial canal; blending with field draining water; purifying; modulating water quantity through water collection biological pond; purifying in the artificial wetland; reconstructing ecological system to restore biological diversity.

Description

1. Technical field [0001] The invention belongs to the technical field of biological treatment of water, waste water or sewage, and particularly relates to a technology for reducing eutrophication substances such as N and P in high-load suburban and farmland non-point source sewage by using plants. 2. Background technology [0002] With the increasing use of agricultural chemical fertilizers, nitrogen content and nitrogen loss in farmland ecosystems are also increasing, which brings great risks to agricultural environmental management and effective use of nitrogen fertilizers (Yan Denghua, 2001; Zhang Shuilong, 1998; Yang Linzhang, 2002; Yang Jinling, 2003; Xia Lizhong, 2003; Xu Qi, 1998; Cao Lizhi, 1998; Cao, 1996; Ekholm, 2000; Sharpley, 1999), a large amount of nitrogen loss will aggravate the eutrophication of surface water Many scholars have expressed concern about this (Shi Dengrong, 2000; Li Ronggang, 2000; Chen Hesheng, 2001; Jin Xiangcan, 2001; Guo Hongyan, 2004; Ga...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/32
Inventor 吴永红胡正义杨林章
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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