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Method for treating copper-containing waste water

A wastewater treatment and wastewater technology, which is applied in the fields of water/sewage multi-stage treatment, neutralized water/sewage treatment, water/sludge/sewage treatment, etc. And other issues

Inactive Publication Date: 2014-04-02
JIUJIANG HUAXIANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the copper sulfide precipitation produced by this method is small and the precipitation effect is poor. It is usually suspended in the water body, and eventually the copper ions in the wastewater will exceed the standard, and the treatment effect is poor.

Method used

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  • Method for treating copper-containing waste water
  • Method for treating copper-containing waste water
  • Method for treating copper-containing waste water

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Embodiment Construction

[0017] The copper-containing wastewater treatment method will be further clarified below in conjunction with the accompanying drawings and specific embodiments.

[0018] see figure 1 , a copper-containing wastewater treatment method, comprising the following steps:

[0019] Step S110, collecting copper-containing wastewater, and adjusting the pH value of the copper-containing wastewater to be greater than or equal to 8 and less than or equal to 10.

[0020] In this embodiment, the collected copper-containing wastewater is printed circuit board (PCB) complex wastewater. The copper-containing wastewater is collected through the wastewater collection tank and discharged into the complex wastewater reaction tank for pH adjustment. When adjusting the pH, calcium oxide is used for adjustment. It can be understood that in order to reduce the amount of chemicals added in the copper-containing wastewater treatment process and further save the cost of copper-containing wastewater tre...

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Abstract

The invention relates to a method for treating copper-containing waste water, comprising the following steps of: firstly, collecting copper-containing waste water, and regulating the pH value of the copper-containing waste water to be more than or equal to 8 and less than or equal to 10; secondly, adding excessive water soluble sulphide into the copper-containing waste water and stirring to be uniform; thirdly, removing precipitates in the copper-containing waste water; fourthly, regulating the pH value of the copper-containing waste water to be more than or equal to 3 and less than or equal to 4; fifthly, adding hydrogen peroxide and ferrous sulphate into the copper-containing waste water; sixthly, regulating the pH value of the copper-containing waste water to be more than or equal to 8 and less than or equal to 10; and seventhly, removing the precipitates produced in the copper-containing waste water. The method for treating the copper-containing waste water provided by the invention has a good treatment effect.

Description

【Technical field】 [0001] The invention relates to a method for treating copper-containing wastewater. 【Background technique】 [0002] Copper-containing wastewater is a type of wastewater produced by metallurgy, electronics and other industries, mainly including printed circuit board etching wastewater, electroplating wastewater, etc. The copper content in copper-containing wastewater is as high as 0.1-35g / L, which greatly exceeds the sewage discharge standard (GB8978-1996). If it is discharged directly, it will seriously pollute the environment. Therefore, necessary measures must be taken to treat copper-containing wastewater. [0003] In the copper-containing wastewater of printed circuit boards, there is a channel of wastewater in the water separation process that mainly exists in the form of complexed copper. Complex copper-containing wastewater is generally treated by sulfide precipitation method, by adding soluble sulfide that can form stable copper sulfide precipitat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/66C02F1/52
Inventor 姚国庆廖启军
Owner JIUJIANG HUAXIANG TECH
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