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Mine acidic wastewater ecological treatment system and treatment method

A technology for mine acid wastewater and ecological treatment, applied in water/sewage treatment, biological water/sewage treatment, neutralized water/sewage treatment, etc. The effect of less pollution, small footprint and simple process

Pending Publication Date: 2019-04-12
HUNAN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the high treatment cost of the neutralization precipitation method existing in the prior art, the wetland method occupies a large area, and the H 2 The problem of S escaping provides an ecological treatment system and treatment method for mine acid wastewater, which has the advantages of simple process and convenient maintenance

Method used

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  • Mine acidic wastewater ecological treatment system and treatment method

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Effect test

Embodiment 1

[0030] Mine acid wastewater is processed through the following steps and process parameters using the mine acid wastewater ecological treatment system of the above-mentioned embodiment of the present invention:

[0031] 1) Collect precipitation: introduce the acidic wastewater from the mine into the sedimentation tank 1 through the water inlet 11, use the sedimentation tank 1 to collect and store the acidic wastewater from the mine, and perform preliminary precipitation to remove part of the suspended matter, and pass the first pipeline 6 into the middle of the sedimentation tank 1 Part of the more stable liquid is introduced into the limestone pond 2 .

[0032] 2) Limestone treatment: Wastewater enters limestone pond 2 through the water outlet at the bottom of limestone pond 2 through first pipeline 6, flows between limestone particles, makes limestone dissolve to improve the pH value of waste water, and the metal ion in waste water is easier to precipitate, and simultaneously...

Embodiment 2

[0038] Use the mine acid wastewater ecological treatment system of the above-mentioned embodiment of the present invention to carry out mine acid wastewater treatment, carry out by the step of embodiment 1 and process parameter, difference is:

[0039] In step 2), the waste water stays in the limestone pond 2 for 90 minutes, and the pH of the liquid in the limestone pond 2 is guaranteed to reach 6 during the treatment process.

[0040] In step 3), the waste water stays in the periclase pool 3 for 60 minutes, ensuring that the pH of the liquid in the periclase pool 3 reaches 8 during the treatment process.

[0041] In step 4), the waste water stays in the sedimentation tank 4 for 120 minutes.

[0042] In step 5), the water level in the aerobic wetland 5 was kept at 10 cm.

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Abstract

The invention relates to the field of wastewater treatment and discloses a mine acidic wastewater ecological treatment system and treatment method. The system comprises a reservoir, limestone tank, periclase tank, sedimentation tank and aerobic wetland which are sequentially communicated; the limestone tank is filled with a mixture of limestone particles and wood shavings; the periclase tank is filled with periclase particles; and the aerobic wetland is a wetland planted with vegetation. The system has the advantages of low use and maintenance cost and good treatment effect. According to the treatment method, mine acidic wastewater sequentially passes through the reservoir, limestone tank for 90 minutes, periclase tank for 60 minutes, sedimentation tank for 120 minutes and aerobic wetlandof the treatment system. The method has stable process and convenient control, and the treated wastewater reaches the class III standard of surface water.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to an ecological treatment system for acidic wastewater in mines and a treatment method thereof. Background technique [0002] The main characteristics of mine acid wastewater are low pH value, high sulfate concentration, rich in high concentration of dissolved iron and various soluble heavy metal ions (such as manganese, copper, zinc, etc.). If the mine acid wastewater is discharged directly without treatment, it will pollute surface water and river courses, damage animals and plants, and endanger human health. [0003] The traditional processes for treating mine acid wastewater mainly include neutralization precipitation method, wetland method and ion exchange method. The neutralization precipitation method is a method of adding a large amount of alkaline substances to the wastewater for neutralization treatment. However, this method will produce a large amount of sludge cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/10C02F101/20C02F101/22
CPCC02F1/5245C02F1/66C02F3/32C02F9/00C02F2101/101C02F2101/20C02F2101/203C02F2101/206C02F2101/22
Inventor 罗琳毛启明杨远余学侯冬梅张攀
Owner HUNAN AGRICULTURAL UNIV
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