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Heavy metal wastewater reaction pool for constructed wetlands

A technology for artificial wetlands and heavy metals, which is applied in water pollutants, biological water/sewage treatment, adsorbed water/sewage treatment, etc. Processing capacity, the effect of large specific surface area

Inactive Publication Date: 2019-07-19
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional treatment process often has the disadvantages of small amount of treated water, high cost, high energy consumption, small scope of application, and easy to cause secondary pollution. The treatment cycle of biological treatment is too long and difficult to control

Method used

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  • Heavy metal wastewater reaction pool for constructed wetlands
  • Heavy metal wastewater reaction pool for constructed wetlands

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The heavy metal wastewater reaction tank of the constructed wetland of the present embodiment includes a substrate layer, and the substrate layer includes an aquatic plant sand layer 1, a volcanic rock layer 2, a composite filler layer 3, a rice husk charcoal layer 4, and crushed stones from top to bottom. Layer 5 and vertically penetrate the aquatic plant sand layer 1, volcanic rock layer 2, rice husk charcoal layer 4, composite filler layer 3 and crushed stone layer 5 and vertically flow through the clapboards arranged in the vertical direction. hole; the particle diameter of the aquatic plant sand layer 1 is 3mm, the particle diameter of the volcanic rock layer 2 is 5mm, the particle diameter of the composite filler layer 3 is 8mm, and the particle diameter of the rice husk charcoal layer 4 is 10mm; The volume ratio of the volcanic rock layer 2, the composite filler layer 3, and the rice husk charcoal layer 4 is 2:1:3;

[0023] The composite filler raw material inclu...

Embodiment 2

[0037] The heavy metal wastewater reaction tank of the constructed wetland of the present embodiment includes a substrate layer, and the substrate layer includes an aquatic plant sand layer 1, a volcanic rock layer 2, a composite filler layer 3, a rice husk charcoal layer 4, and crushed stones from top to bottom. Layer 5 and vertically penetrate the aquatic plant sand layer 1, volcanic rock layer 2, rice husk charcoal layer 4, composite filler layer 3 and crushed stone layer 5 and vertically flow through the clapboards arranged in the vertical direction. hole; the particle diameter of the aquatic plant sand layer 1 is 4mm, the particle diameter of the volcanic rock layer 2 is 12mm, the particle diameter of the composite filler layer 3 is 15mm, and the particle diameter of the rice husk charcoal layer 4 is 20mm; The volume ratio of the volcanic rock layer 2, the composite filler layer 3, and the rice husk charcoal layer 4 is 2:1:3;

[0038] The composite filler raw material inc...

Embodiment 3

[0052] The heavy metal wastewater reaction tank of the constructed wetland of the present embodiment includes a substrate layer, and the substrate layer includes an aquatic plant sand layer 1, a volcanic rock layer 2, a composite filler layer 3, a rice husk charcoal layer 4, and crushed stones from top to bottom. Layer 5 and vertically penetrate the aquatic plant sand layer 1, volcanic rock layer 2, rice husk charcoal layer 4, composite filler layer 3 and crushed stone layer 5 and vertically flow through the clapboards arranged in the vertical direction. hole; the particle diameter of the aquatic plant sand layer 1 is 3mm, the particle diameter of the volcanic rock layer 2 is 12mm, the particle diameter of the composite filler layer 3 is 8mm, and the particle diameter of the rice husk charcoal layer 4 is 20mm; The volume ratio of the volcanic rock layer 2, the composite filler layer 3, and the rice husk charcoal layer 4 is 2:1:3;

[0053] The composite filler raw material incl...

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Abstract

The invention discloses a heavy metal wastewater reaction pool for constructed wetlands. The heavy metal wastewater reaction pool comprises: a matrix layer, wherein the matrix layer sequentially comprises an aquatic plant sand layer, a volcanic rock layer, a composite filler layer, a rice husk carbon layer and a gravel layer from top to bottom; and separation plates vertically penetrating throughthe volcanic rock layer, the rice husk carbon layer, the composite filler layer and the gravel layer and arranged perpendicular to a flowing direction, wherein a plurality of flowing through holes areuniformly distributed on the separation plates. According to the present invention, heavy metals in wastewater are trapped in the heavy metal wastewater reaction pool in the wetland mainly through precipitation, adsorption, co-settlement, complexation, redox, ion exchange and other actions, and are removed through adsorption, precipitation, plant absorption, microbial metabolic activities and other biodegradation actions, wherein the results of the 18-month operation monitoring process show that the removal rates of Cd<2+>, Cr<6+>, Cu<2+>, Mn<2+>, Pb and Cd are up to more than 99.8%, 99.7%, 97.5%, 98.8%, 97.98.% and 98.99%, and the average removal rates of COD, BOD5, NH3-N and TP are respectively up to more than 95.6%, 94.2%, 95.2% and 90.8%.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to a heavy metal waste water reaction tank in an artificial wetland. Background technique [0002] Heavy metal pollution mainly comes from two aspects: human activities and natural release. According to research, the contents of Pb, Zn and Cu in sewage are 30, 40 and 15 times their average contents in crustal rocks, respectively. Natural release mainly includes natural weathering and erosion and volcanic activity, etc. Generally speaking, heavy metals entering the water environment through natural means will not cause water pollution, but a large amount of heavy metal pollutants entering the water environment due to human activities will not only cause pollution Animals and plants in the water environment will cause direct harm, and will have serious adverse effects on human health and the entire ecological balance, causing incalculable economic and ecological losses. In recen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/42C02F1/52C02F3/10C02F3/32C02F3/34C02F101/20
CPCC02F1/28C02F1/42C02F1/52C02F3/105C02F3/32C02F3/34C02F2001/007C02F2101/20Y02W10/10
Inventor 关伟杜建伟李开明温勇张明杨贺框
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP