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Treatment method of copper-bearing waste water

A treatment method and waste water technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., to achieve the effects of easy control, high efficiency, and simple operation

Inactive Publication Date: 2011-04-13
NO 53 RES INST OF CHINA NORTH IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using flocculants to improve treatment efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Add 100L of blue copper powder washing and copper powder silver-plating waste water (copper content about 5g / L) into the enamel bucket, start the speed-regulating dispersing machine at a speed of 300r / min, and add 4.5kg of sulfide with a concentration of 15% to the bucket. Sodium aqueous solution, then add 5g of 1% PDDA aqueous solution to the bucket, stop stirring after 2-3min, black precipitate is formed rapidly, after standing for a while, take 2-3ml of supernatant, add 5 drops of untreated wastewater, black precipitate Generated, the treatment liquid is transferred to a centrifuge for solid-liquid separation, and the black solid—copper sulfide is collected.

[0036] The filtrate is transferred in the bucket, start the speed regulating disperser, the rotating speed is 300r / min, add 800g concentration in the bucket and be 20% potassium persulfate aqueous solution, the mixed solution becomes a milky white turbid liquid, stop stirring, take it out after standing for a wh...

Embodiment 2

[0038]Add 100L of blue copper powder washing and copper powder silver-plating waste water (copper content about 1g / L) into the enamel bucket, start the speed-regulating disperser at a speed of 400r / min, and add 1.0kg of sulfide with a concentration of 10% to the bucket. Potassium aqueous solution and 1.0kg concentration of 10% sodium sulfide aqueous solution, then add 100g of 0.01% DADMAC-AM aqueous solution to the bucket, stop stirring after 2 to 3 minutes, black precipitate is formed rapidly, after standing for a while, take the supernatant 2 ~3ml, add 6 drops of untreated waste water dropwise, black precipitate is formed, transfer the treated liquid to a centrifuge for solid-liquid separation, and collect the black solid—copper sulfide.

[0039] The filtrate is transferred in the bucket, start the speed regulating disperser, the rotating speed is 400r / min, add 600g concentration in the bucket and be 10% sodium hypochlorite aqueous solution, the mixed solution becomes milky w...

Embodiment 3

[0041] 100L blue copper powder silver plating waste liquid (copper content about 10g / L) is added in the enamel barrel, start the speed regulating disperser, the rotating speed is 200r / min, add the sodium sulfide aqueous solution that concentration is 5kg20% in the barrel, then to Add 20g of 1% PAM aqueous solution to the bucket, stop stirring after 2 to 3 minutes, black precipitate forms rapidly, take 2 to 3ml of the supernatant after standing for a while, add 4 drops of untreated wastewater, no change occurs, continue to add sodium sulfide aqueous solution 1kg, repeat the above process, the mixed solution still does not change after dropping untreated wastewater, then add 500g of sodium sulfide aqueous solution, repeat the above process, after dropping untreated wastewater, a black precipitate is formed, and the treated solution is transferred to a centrifuge for further processing. Solid-liquid separation, collecting black solid - copper sulfide.

[0042] The filtrate is tra...

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PUM

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Abstract

The invention belongs to the field of sewage treatment, and relates to a treatment technique of industrial waste water. The invention particularly relates to a treatment method of copper-bearing waste water. In the treatment method, a water-soluble sulfide serves as a precipitant to realize the recovery of copper; the using amount of the sulfide is controlled by a photo-chromic reaction; a hypochlorite or persulfate type oxidant is adopted to perform oxidation desulphurization, thereby fulfilling the aims of recovering excessive sulfur and achieving up-to-standard emission of the copper and the sulfur in the waste water. The basic process of the treatment method comprises sulfide precipitation and the oxidation desulphurization, and the treatment method has a good treatment effect and a high efficiency, is easy to operate and control; and the treated waste water is colorless and transparent, and the copper and sulfur content is far lower than a national emission standard. The copper sulfide and elemental sulfur recovered by the treatment method are high in purity and can be directly used as industrial products. The treatment method of the copper-bearing waste water is suitable for treating the copper-bearing waste water such as copper powder washing and copper powder silver plating waste water, printed circuit board etching waste water, electroplating waste water, copper wet-process metallurgical waste water and the like, and is particularly suitable for treating the copper powder washing and copper powder silver plating waste water.

Description

technical field [0001] The invention belongs to the field of sewage treatment, relates to industrial waste water treatment technology, in particular to multi-stage treatment technology of copper-containing waste water. Background technique [0002] Copper-containing wastewater is a kind of wastewater produced by metallurgy, electronics and other industries, mainly including copper powder washing and silver plating wastewater, printed circuit board etching wastewater, electroplating wastewater and copper hydrometallurgical wastewater. The copper content in wastewater is as high as 0.1-10.0g / L, which greatly exceeds the sewage discharge standard (GB 8978-1996). If it is discharged directly, it will not only seriously pollute the environment, but also cause a large waste of resources. Therefore, necessary measures must be taken to treat copper-containing wastewater. [0003] At present, the methods for treating copper-containing wastewater at home and abroad mainly include che...

Claims

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Application Information

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IPC IPC(8): C02F9/04
Inventor 徐勤涛孙建生杨丰帆张蕾刘景于万增
Owner NO 53 RES INST OF CHINA NORTH IND GRP
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