A kind of artificial wetland water purification method

A technology for water purification and constructed wetlands, applied in chemical instruments and methods, multi-stage water/sewage treatment, biological water/sewage treatment, etc. The effect of backflow, promoting efficiency improvement, and improving reoxygenation efficiency

Active Publication Date: 2020-06-19
BEIJING WATER SCI & TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects of weak reoxygenation ability and low purification efficiency in the existing artificial wetland sewage treatment process, so as to provide a new and efficient method for water purification using artificial wetland

Method used

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  • A kind of artificial wetland water purification method
  • A kind of artificial wetland water purification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment provides a method for purifying water quality in constructed wetlands, using such as Figure 1-2 The technological process of the constructed wetland system shown is:

[0043] After the sewage to be treated is settled and filtered by the trash rack, the sewage is lifted by the water inlet pipe 11 and the water inlet pump to the water inlet adjustment tank 12, mixed with the water flow drawn back from the bottom of the secondary wetland by the return pump 33, and flows into the primary wetland through the pipeline. In the first-grade wetland, the distribution ditch formed by large stones infiltrates vertically, and is filtered and purified by the wetland medium filler. The water level regulating pipe 31 and the water outlet control valve 32 control the highest water level of the water outlet, the lowest water level and the water outlet flow.

[0044] The outlet water from the primary wetland is regulated by the regulating well, and then distributed evenl...

experiment example

[0073] Use the above specific wetland system for rural domestic sewage treatment, specific operating parameters: daily treatment flow rate 30m 3 , wetland effective area 150m 2 , The intermittent operation cycle is 3 times a day for 8 hours each time, and the time for each water inlet and synchronous return is 3 hours. The treatment effect is shown in the following table: unit (mg / L),

[0074] COD NH 3 -N

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Abstract

The invention belongs to the technical field of domestic sewage treatment, and particularly relates to a water purification method by utilizing an artificial wetland. The method comprises the following steps: sewage to be treated is sent to a downstream first-stage wetland for treatment, a water flow treated by the first-stage wetland continues to enter an upstream second-stage wetland for treatment, a part of the treated water is sucked and flows back from the bottom of the second-stage wetland by a return pump to be mixed with sewage to be treated in a water inlet regulating tank, the otherpart continues to pass through the upstream second-stage wetland for treatment, and the treated water is discharged, wherein influent water of the downstream first-stage wetland is intermittent influent water, and the backflow is intermittent backflow; and the downstream first-stage wetland maintains continuous effluent water. The method provided by the invention realizes controllable variation ofa water level in the wetland by regulating and controlling intermittent influent water, intermittent backflow and a flow rate of the effluent water to form a periodic water level rise and fall, and can effectively improve reoxygenation efficiency of the first-stage wetland and the second-stage wetland, improve aerobic degradation ability of the artificial wetland, and improve purification efficiency.

Description

technical field [0001] The invention belongs to the technical field of domestic sewage treatment, and in particular relates to a water purification method using artificial wetlands. Background technique [0002] Wetland refers to the intersection of land and water, the water level is close to or on the ground surface, or there is shallow water accumulation, which can maintain the growth of large aquatic plants. Wetlands include natural wetlands and artificial wetlands. Natural wetlands are formed under natural conditions, so they are often an uncontrollable environment in terms of formation location, formation area, and biological diversity. Constructed wetlands are artificial ecosystems simulated on the basis of natural wetlands. Under human control, artificial wetlands can make the internal ecosystems of wetlands present a variety of biological species. Currently, they are widely used in the field of domestic sewage and wastewater treatment. [0003] The principle of pur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
CPCC02F1/001C02F3/302C02F9/00C02F2001/007
Inventor 黄炳彬胡晓静李其军常国梁战楠
Owner BEIJING WATER SCI & TECH INST
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