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Method for processing acid mine drainage

A technology of mine acid wastewater and treatment method, which is applied in mining wastewater treatment, water/sewage treatment, neutralized water/sewage treatment, etc., can solve the problems of insufficient removal of suspended particulate matter and inability to sufficiently reduce the content of heavy metals in wastewater, and achieve cost Low cost and good operability

Inactive Publication Date: 2012-09-26
GUIZHOU NORMAL UNIVERSITY
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  • Summary
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AI Technical Summary

Problems solved by technology

Due to the influence of the water flow, the volume of the sedimentation tank, the residence time, etc., the suspended particles in the water are often not fully removed, and the heavy metal content in the wastewater cannot be fully reduced.

Method used

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Effect test

Embodiment 1

[0015] Filter certain mine acid wastewater with the treatment method of the present invention, and its heavy metal particulate matter content is shown in Table 1.

[0016] Table 1 Content of heavy metal particulate matter in acid wastewater from a mine

[0017] Antimony (μg / L)

5635.736

Arsenic (μg / L)

91.316

Mercury (μg / L)

8.621

[0018] Charcoal in the present embodiment selects powdered active carbon for use, and filter layer thickness 50cm, calcium carbonate selects the calcium carbonate particle of diameter 2mm for use, filter layer thickness 25cm, and fiber selects diameter 10mm for use; Thick 4mm flat fiber ellipsoid common cotton ball, filter layer thickness 100cm. Mine acid wastewater was filtered through charcoal filter layer, calcium carbonate filter layer, and fiber filter layer in sequence to obtain treated mine acid wastewater. The content of heavy metal particulate matter is shown in Table 2.

[0019] Table 2 Conte...

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PUM

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Abstract

The invention discloses a method for processing acid mine drainage. The acid mine drainage is filtered by wood charcoal, calcium carbonate and fiber, and the thickness of each filter layer of the wood charcoal, the calcium carbonate and the fiber is not less than 10mm. According to the method, the pH of the acid mine drainage is adjusted to be 6-8 so as to achieve the national standard of acid mine drainage pH discharge, and stibium content in antimony mine wastewater is reduced to be below 0.5mg / L set by the environmental pollutant discharge standard of Guizhou province, and meanwhile, the method has excellent effect on the treatment on heavy metal mine wastewater.

Description

technical field [0001] The invention relates to a treatment method of mine wastewater, in particular to a treatment method of mine acid wastewater. Background technique [0002] In the process of beneficiation and mining, a large amount of particulate matter will be produced, and these substances will be suspended in the water body after entering the water body. Due to the small size and large surface area of ​​these suspended granular substances, they have large surface energy and can absorb heavy metal ions in water to a certain extent. Such as reducing the content of suspended particulate matter in water, it provides the possibility for the treatment of mine acid wastewater. [0003] In the prior art, the main method for removing suspended particulate matter in mine acid wastewater is to build a sedimentation tank to allow the particulate matter to settle naturally, or to add some coagulants to accelerate the sedimentation of the particles. Due to the influence of the w...

Claims

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Application Information

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IPC IPC(8): C02F1/00C02F1/66C02F1/62C02F103/10
Inventor 胡继伟刘春李治兵罗晋黄先飞
Owner GUIZHOU NORMAL UNIVERSITY
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