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Treatment method for non-ferrous metal mine wastewater

A technology of mine wastewater and treatment method, applied in the field of environmental protection technology and water treatment, can solve the problems of ecological environment hazards, complex water quality, low treatment cost, etc., and achieve the effects of stable system operation, simple process flow and high treatment efficiency

Active Publication Date: 2014-10-01
CHANGCHUN GOLD RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Nonferrous metal mine wastewater mainly includes mining mine water and mineral processing wastewater, of which mineral processing wastewater accounts for the majority. Nonferrous metal mine wastewater has complex water quality and various components, including various heavy metals, organic chemicals and other pollutants. If it is discharged outside, it will pollute the surrounding area The ecological environment has caused serious harm. If it is returned to the production process, as the harmful substances in the wastewater will continue to accumulate, it will also have an adverse impact on the production process and equipment. Therefore, it is necessary to choose an appropriate treatment method to treat these wastewater
At present, the commonly used treatment methods include chemical precipitation method, adsorption method, microbial method, artificial wetland method, etc. Although these treatment methods have certain advantages, they are generally limited by factors such as mine production conditions, environmental conditions or treatment requirements. For example, the chemical precipitation method is relatively effective in treating heavy metals, but the treatment effect of organic substances is poor; the adsorption method can effectively treat heavy metal wastewater, but when the adsorbent is regenerated, the pollutants will be regenerated; the cost of microbial treatment is relatively low, but Reaction conditions are relatively harsh, and it is difficult to be popularized and applied; the wetland method occupies a large area, and the treatment cycle is long, and it is difficult to meet the treatment requirements

Method used

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Examples

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specific example 1

[0023] The wastewater from a non-ferrous metal mine has a pH of 6.8, a COD of 566.4 mg / L, a copper ion of 18.6 mg / L, a zinc ion of 10.5 mg / L, and trace amounts of other heavy metal ions. Use a peristaltic pump to pump 3L of the waste water into a reactor equipped with a stirring device, an ultraviolet lamp device and an ozone aeration device. The stirring device is set in the center of the reactor. Between the paddle and the inner wall of the reactor, the ozone is aerated with a titanium alloy filter element microporous, placed at the bottom of the reactor, the stirring device is turned on, and the pH of the wastewater is adjusted to 4.0 with 1% sulfuric acid solution at a stirring linear velocity of 0.5m / s. Turn on the ultraviolet light, continue to feed ozone and add 30% hydrogen peroxide to react for 30 minutes, the amount of ozone feed is 50mg / L, the dosage of 30% hydrogen peroxide is 8mL, stop feeding ozone after the reaction is over, and add 4g / L sulfuric acid 100mL of f...

specific example 2

[0025] Wastewater from a non-ferrous metal mine has a pH of 6.8, COD of 875.4mg / L, copper ions of 87.4mg / L, lead ions of 43.2mg / L, zinc ions of 17.5mg / L, and trace amounts of other heavy metal ions. Use a peristaltic pump to pump 3L of the waste water into a reactor equipped with a stirring device, an ultraviolet lamp device and an ozone aeration device. The stirring device is arranged in the center of the reactor. Between the paddle and the inner wall of the reactor, the ozone is aerated with a titanium alloy filter element microporous, placed at the bottom of the reactor, the stirring device is turned on, and the pH of the wastewater is adjusted to 4.0 with 1% sulfuric acid solution at a stirring linear velocity of 0.5m / s. Turn on the ultraviolet light, continue to feed ozone and add 30% hydrogen peroxide for 30 minutes to react, the amount of ozone feed is 80mg / L, the dosage of 30% hydrogen peroxide is 12mL, stop feeding ozone after the reaction is over, and add 4g / L sulfuri...

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Abstract

The invention discloses a treatment method for non-ferrous metal mine wastewater. The treatment method comprises the following steps: adjusting the pH value of the mine waste water to faintly acid; inletting ozone and adding hydrogen peroxide to carry out collaborative ultraviolet-ozone-hydrogen-peroxide advanced oxidation reaction under the condition of stirring and irradiating with an ultraviolet lamp; then, adding Fe<2+> reagent to carry out an ultraviolet-fenton advanced oxidation reaction; adding a coagulant to carry out coagulation and still standing precipitation after adding alkali liquid into the oxidation-reacted wastewater to adjust the pH value under the condition of stirring. The treatment method combines an ultraviolet-ozone-hydrogen peroxide advanced oxidation technology with a coagulating precipitation technology to treat the wastewater collaboratively according to the characters of the non-ferrous metal mine wastewater quality, such as complexity and unmanagement; as the treatment method has the advantages that the treating effect is good, the treating efficiency is high, the system operates stably and the technological process is simple, the industrial application is convenient to realize. Especially for the non-ferrous metal mine wastewater which is hard to treat, the treatment method has the advantage that other methods cannot achieve.

Description

technical field [0001] The invention relates to the fields of environmental protection technology and water treatment technology, in particular to a treatment method for nonferrous metal mine wastewater. Background technique [0002] Nonferrous metal mine wastewater mainly includes mining mine water and mineral processing wastewater, of which mineral processing wastewater accounts for the majority. Nonferrous metal mine wastewater has complex water quality and various components, including various heavy metals, organic chemicals and other pollutants. If it is discharged outside, it will pollute the surrounding The ecological environment has caused serious harm. If it is returned to the production process, as the harmful substances in the wastewater will continue to accumulate, it will also have an adverse impact on the production process and equipment. Therefore, it is necessary to choose an appropriate treatment method to treat these wastewater. At present, the commonly use...

Claims

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Application Information

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IPC IPC(8): C02F9/08
Inventor 刘强李哲浩龙振坤王莹
Owner CHANGCHUN GOLD RES INST