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Processing method of electroplating wastewater

A technology for electroplating wastewater and treatment methods, which is applied in metallurgical wastewater treatment, water/sewage treatment, neutralization water/sewage treatment, etc., and can solve the problems of complex water quality and difficult control of components of electroplating wastewater

Inactive Publication Date: 2019-07-23
襄阳先创环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water quality of electroplating wastewater is complex and its composition is difficult to control. It contains various metal ions and other harmful components

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A treatment method for electroplating wastewater, comprising the following steps: (1) coarse filtration: coarsely filter the electroplating wastewater through a filter device or a thermal grid, and pass the filtered solution into a treatment pool; (2) feed the wastewater into the treatment pool Add acid to the wastewater to adjust the pH value to 2.5, so that the fine impurities are fully dissolved; (3) Add alkali to the solution to adjust the pH value, filter the precipitate, and adjust the pH value including the first step adjustment, the second step adjustment and the third step Adjustment; the pH value adjusted in the first step is 6, filter after precipitation, and then adjust to the remaining filtrate in the second step to a pH value of 8.1, filter after precipitation, and then perform the second adjustment to the remaining filtrate To PH value is 8.2. (4) Pass the remaining filtrate into the electrocoagulation tank, add PAC and PAM, use high-frequency pulse volta...

Embodiment 2

[0016] A treatment method for electroplating wastewater, comprising the following steps: (1) coarse filtration: coarsely filter the electroplating wastewater through a filter device or a thermal grid, and pass the filtered solution into a treatment pool; (2) feed the wastewater into the treatment pool Add acid to the wastewater to adjust the pH value to 4, so that the fine impurities are fully dissolved; (3) Add alkali to the solution to adjust the pH value, filter the precipitate, and adjust the pH value including the first step adjustment, the second step adjustment and the third step Adjustment; the pH value adjusted in the first step is 7.4, and the precipitate is filtered, and then the second step is adjusted to the remaining filtrate to a pH value of 7.4, and the precipitate is filtered, and then the second step is adjusted to the remaining filtrate to PH value of 10. (4) Pass the remaining filtrate into the electrocoagulation tank, add PAC and PAM, use high-frequency pu...

Embodiment 3

[0018] A treatment method for electroplating wastewater, comprising the following steps: (1) coarse filtration: coarsely filter the electroplating wastewater through a filter device or a thermal grid, and pass the filtered solution into a treatment pool; (2) feed the wastewater into the treatment pool Add acid to the wastewater to adjust the pH value to 2.9, so that the fine impurities are fully dissolved; (3) Add alkali to the solution to adjust the pH value, filter the precipitate, and adjust the pH value including the first step adjustment, the second step adjustment and the third step Adjustment; the pH value adjusted in the first step is 7, and the precipitate is precipitated and filtered, and then the remaining filtrate is adjusted to a pH value of 7.7, and the precipitate is filtered, and then the remaining filtrate is adjusted for the second step To PH value is 8.8. (4) Pass the remaining filtrate into the electrocoagulation tank, add PAC and PAM, use high-frequency pu...

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PUM

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Abstract

The invention provides a processing method of electroplating wastewater. The processing method comprises the following steps: (1) coarse filtering: carrying out coarse filtering on electroplating wastewater through a filtering device or a thermal grid, and introducing a filtered solution into a treatment pond; (2) adding acid into wastewater in the treatment pond to regulate a pH (Potential of Hydrogen) value to 2.5-4, and enabling tiny impurities to be sufficiently dissolved; (3) adding alkali into the solution to regulate a pH value to 6-10, and filtering precipitates; (4) introducing residual filtrate into an electric flocculation pond, adding PAC (polymeric aluminium) and PAM (polyacrylamide), utilizing high-frequency pulse voltage to power on in the wastewater, degrading to remove COD(chemical oxygen demand), forming hydroxide, regulating the pH of waste liquid to 8-9, and adding magnetic powder to realize mud and water separation. The processing method of the electroplating waste water has the following beneficial effects that various metal ions can be fully removed, soluble gas is removed, decoloration and odor removal are carried out, and obtained water can achieve a discharge standard.

Description

technical field [0001] The invention relates to a treatment method for electroplating wastewater, which belongs to the technical field of sewage treatment. Background technique [0002] The sources of electroplating wastewater are generally: (1) plating cleaning water; (2) waste electroplating solution; (3) other wastewater, including washing the floor of the workshop, scrubbing plate washing water, condensed water from ventilation equipment, and leakage from plating tanks. Or various tank fluids and drains of "running, popping, dripping, and leaking" caused by improper operation and management; (4) Equipment cooling water, which has not been polluted except for the temperature rise during use. The water quality and quantity of electroplating wastewater are related to the process conditions of electroplating production, production load, operation management and water use methods and other factors. The water quality of electroplating wastewater is complex, and its compositio...

Claims

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Application Information

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IPC IPC(8): C02F9/12C02F101/20C02F103/16
CPCC02F9/00C02F1/001C02F1/66C02F1/463C02F1/488C02F1/283C02F2101/20C02F2103/16C02F2303/16
Inventor 姜守国
Owner 襄阳先创环保科技有限公司