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Acidic heavy metal wastewater treatment system

A wastewater treatment system and technology for heavy metals, which are applied in multi-stage water treatment, water/sewage treatment, biological water/sewage treatment, etc., can solve the problems of excessive heavy metal content, low quality of agricultural products, and high heavy metal content, and achieve low construction costs, Cost-effective, easy-to-maintain results

Pending Publication Date: 2017-10-20
SHENZHEN TECHAND ECOLOGY & ENVIRONMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its pH is low and the content of heavy metals is high. If it is used directly as irrigation water, it will cause the plants to fail to grow, or the quality of the planted agricultural products will be low, and the content of heavy metals will exceed the standard and cannot be eaten.

Method used

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  • Acidic heavy metal wastewater treatment system

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Effect test

Embodiment 1

[0020] refer to figure 1 , figure 1 It is a cross-sectional structure diagram of an acidic heavy metal wastewater treatment system. This embodiment provides an acidic heavy metal wastewater treatment system, including a sedimentation tank 1, a purification tank 2 and an ecological ditch 3 connected in sequence, and the wastewater flows through the sedimentation tank 1, The purification pond 2 and the ecological ditch 3 are provided with two partitions in the purification pond 2, and the two partitions divide the purification pond 2 into a limestone chamber 4, an anaerobic chamber 5 and a wetland chamber 6. The sedimentation tank 1 is connected to the limestone chamber 4 . A water inlet 14 is arranged on the side wall of the limestone chamber 4 , and the water inlet 14 is arranged on the upper part of the limestone chamber 4 . The limestone chamber 4 and the anaerobic chamber 5 are separated by the partition one 7, and the anaerobic chamber 5 and the wetland chamber 6 are sep...

Embodiment 2

[0026] This embodiment also provides another acidic heavy metal wastewater treatment system, which is basically the same as that of Embodiment 1, except that the limestone chamber 4 accounts for 20% of the volume of the purification pond 2, and the anaerobic chamber 5 It accounts for 10% of the volume of the purification pool 2 . The organic matrix layer 9 is a peat soil layer with a thickness of 20 cm, and the thickness of the heavy metal adsorbent layer 11 is 30 cm. The depth of the ecological ditch 3 is 0.8m, and the width is 0.2m.

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Abstract

The invention discloses an acidic heavy metal wastewater treatment system. The system comprises a sedimentation tank, a purification tank and an ecological ditch which are sequentially connected, wastewater sequentially flows through the sedimentation tank, the purification tank and the ecological ditch, two separator plates are arranged in the purification tank and divide the purification tank into a limestone chamber, an anaerobic chamber and a wetland chamber, the limestone chamber and the anaerobic chamber are separated by the separator plate 1, the anaerobic chamber and the wetland compartment are separated by the separator plate 2, the separator plate 1 and the separator plate 2 are respectively provided with water passing holes, and the sedimentation tank is connected with the limestone chamber; and the acidic heavy metal wastewater goes through the sedimentation tank to remove solid particles in the wastewater, then flows into the limestone chamber to increase the pH value of the wastewater, then flows into the anaerobic chamber, further flows into the wetland chamber to remove the heavy metals in the wastewater, and then flows into the ecological ditch, and the heavy metals are further intercepted and removed by using microorganisms in and surrounding plant roots to make the water quality meet national irrigation water quality standards.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an acidic heavy metal wastewater treatment system. Background technique [0002] Acidic heavy metal wastewater includes acid mine wastewater, polluted farmland irrigation water, etc. Its pH is low and the content of heavy metals is high. If it is used directly as irrigation water, it will cause the plants to fail to grow, or the quality of the planted agricultural products will be low, and the content of heavy metals will exceed the standard and cannot be eaten. Therefore, measures must be taken to treat acidic heavy metal wastewater so that it meets the national farmland irrigation water quality standard (GB5084-2005) before use. Ensuring the safety of farmland irrigation water in mining areas is one of the important measures to control farmland soil heavy metal pollution. Contents of the invention [0003] The technical problem to be solved by the present invent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/20
CPCC02F9/00C02F1/283C02F1/281C02F1/66C02F1/52C02F3/2826C02F3/34C02F3/32C02F2101/20C02F2301/08
Inventor 熊云武吴启堂林晓燕裴东辉郭跃华王丽李红艳李诗刚赵亮许建新张文平杜林峰梁鹏彭文宇
Owner SHENZHEN TECHAND ECOLOGY & ENVIRONMENT CO LTD