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Method for processing electroplating wastewater

A technology for electroplating wastewater and wastewater, which is applied in the fields of metallurgical wastewater treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. Contribution is prominent, sludge composition is simple, and the effect of recycling is realized

Inactive Publication Date: 2013-02-27
CHANGDE LYRUN MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Nevertheless, the defects of the above three methods are obvious. The amount of sludge generated after chemical treatment is large, and it is difficult to carry out further treatment due to the complex composition, which makes it almost impossible to realize the reuse of sludge, resulting in metal waste; electrolysis The high energy consumption of the method and the fast consumption of electrodes lead to high operating costs; the high technical difficulty, high cost of membrane treatment, and difficulty in regeneration and recovery of the membrane treatment method hinder its wide application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Adjust the pH value of the wastewater generated by the electroplating operation to between 4 and 8, and then treat it with the electroflocculation method. The device used in the electroflocculation method has a power supply current controlled by a constant current or constant voltage power supply, and the control output current is 15A, the treatment time of wastewater in the electrocoagulation device is 8 minutes; after the sedimentation treatment, the discharged secondary wastewater adjusts its pH value between 4 and 8, and then enters the biosorption unit for treatment. There are 30 The yeast layer of the first layer, the dosage of the total yeast layer is 3kg per ton of water, the residence time of the secondary wastewater in the biological unit is 8min, and finally drained.

[0012] After the above-mentioned treatment, the drainage water has been tested, and the quality of the effluent water meets the national standards and can be reused in production.

Embodiment 2

[0014] Step is identical with embodiment 1, but each control parameter is as follows:

[0015] The control output current of electrocoagulation is 10A; the treatment time of wastewater in the electrocoagulation device is 10min;

[0016] There are 25 layers of yeast layers in the biosorption unit, the amount of the total yeast layer is 3.8kg per ton of water, and the residence time of the secondary wastewater in the biological unit is 12min.

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Abstract

The invention provides a method for processing electroplating wastewater, which comprises the following steps that: after a pH (Potential Of Hydrogen) value of the electroplating wastewater is adjusted, an electric flocculation method is adopted for treatment; after sedimentation treatment, discharged secondary wastewater enters a biosorption unit containing yeast to stand to be subjected to treatment; and finally, water is discharged. The method disclosed by the invention is low in operation cost, the generated sludge is easy in treatment, the energy consumption is lower, and the environment friendly property is good.

Description

technical field [0001] The invention relates to a method for treating wastewater, in particular to a method for treating electroplating wastewater. Background technique [0002] At present, chemical precipitation method, electrolysis method and membrane treatment method are three methods that are routinely used in the industry to treat electroplating wastewater. Nevertheless, the defects of the above three methods are obvious. The amount of sludge generated after chemical treatment is large, and it is difficult to carry out further treatment due to the complex composition, which makes it almost impossible to realize the reuse of sludge, resulting in metal waste; electrolysis The method has high energy consumption and fast electrode consumption, which leads to high operating costs; the membrane treatment method has hindered its wide application due to high technical difficulty, high cost of membrane treatment, and difficulty in regeneration and recovery. Contents of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/16
Inventor 陈红辉杨基峰黄小兵朱济群肖进春周小平
Owner CHANGDE LYRUN MATERIAL
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