Method for treating acid waste water containing copper and iron

A technology of acid wastewater and treatment method, applied in water/sewage multi-stage treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the high cost of low-concentration copper treatment and the cost of ion exchange treatment. High performance, deteriorating operating environment, etc., to achieve the effect of significant deodorization and sterilization function, fast floc formation, and good treatment effect.

Inactive Publication Date: 2012-07-04
厦门紫金矿冶技术有限公司
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Problems solved by technology

[0003] Electrolysis is a relatively mature method, but the cost of processing low-concentration copper is relatively high
The chemical precipitation method has simple process, low investment and convenient operation, but because the chemical precipitation method needs to add a large amount of lime, a large amount of waste residue will be generated, and valuable metals such as copper in the wastewater cannot be recovered.
The sulfidation precipitation method can effectively recover copper in wastewater, but it will produce toxic gas hydrogen sulfide under acidic conditions, which will cause deterioration of the operating environment
The ion exchange method has disadvantages such as high processing cost

Method used

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Embodiment Construction

[0024] The present invention is further illustrated by the following examples.

[0025] 1) Acidic wastewater from a mine contains Cu 2+ 1g / L, Fe 2+ 10g / L, Fe 3+ 30g / L, pH=1.3. The amount of reduced iron powder added was 25g / L, stirred and reacted for 3h, and filtered after the reaction. Copper is extracted from filter residue. After the replacement, the solution is light green, and the Cu in the solution 2+ up to 0.5mg / L, Fe 2+ The concentration is 60g / L, and the pH of the solution is 3.5.

[0026] 2) Thiobacillus ferrooxidans and Microspirillum ferrooxidans were activated and preserved by using 9K medium (the components of 9K medium were (NH 4 ) 2 SO 4 3g / L, KH 2 PO 4 0.5g / L, KCl 1.0g / L, MgSO 4 ·7H 2 O 0.5g / L, Ca(NO 3 ) 2 4H 2 (00.01g / L). The mixture of 9K medium and replacement liquid was used to acclimatize the activated mixed strains, and the proportion of replacement liquid was 10%, 30%, 50%, 70%, 90%, and 100%. The inoculum ratio for activation and ac...

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Abstract

The invention discloses a method for treating acid waste water containing copper and iron. The method comprises the steps of: firstly, carrying out metathesis on copper in wastewater by using iron powder and filtering; secondly, activating and culturing strains preserved in a unit by using a solution obtained through the metathesis, and carrying out domestication; thirdly, oxidizing the solution obtained through the metathesis by using domesticated bacteria under the stirring or aerating condition; and fourthly, generating polyferric sulfate by using an oxidized Fe<3+> solution. The method has the advantages of short process flow, simple equipment structure, less investment, low cost, environment friendliness because of no generation of externally-emitted matters, and capability of recycling valued metals so that economic benefit is increased.

Description

technical field [0001] The invention relates to a wastewater treatment method, especially a method for treating copper-containing and iron-containing acidic wastewater. The method of the invention can be used for the treatment of copper-containing and iron-containing acidic wastewater produced in the mining production process of copper sulfide ore, and can also be used as a polymerization Production method of iron sulfate. Background technique [0002] During the mining and production process of copper sulfide ore, the produced copper-containing and iron-containing acidic wastewater has a low pH and a high concentration of metal ions, causing great pollution to the environment. At present, the treatment technologies of acidic wastewater containing copper and iron mainly include: chemical method: electrolysis method, chemical neutralization method, sulfide precipitation method, precipitation flotation method; physical and chemical method: reverse osmosis method, ion exchange ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/34
Inventor 董博文李明浩刘升明谢洪珍张卿季常青阴菡
Owner 厦门紫金矿冶技术有限公司
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