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Method for recycling wastewater of electroplating industry

A sewage and industrial technology, applied in the field of wastewater recycling and treatment, can solve the problems of great human harm, ecological environment and human harm, complex electroplating wastewater water quality, etc., and achieve the effect of less soluble gas and low metal content

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, involving a variety of heavy metal ions and other harmful substances, which is extremely harmful to humans
If these electroplating wastewater does not meet the discharge standards and enters the environment directly, it will definitely cause extensive and serious harm to the ecological environment and human beings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A method for recycling sewage in the electroplating industry, comprising the following steps:

[0014] (1) The electroplating wastewater is filtered through a grid, and the filtrate enters the flocculation tank;

[0015] (2) Add PAC to the flocculation tank first, after the precipitation is stable, then add PAM, stir and mix well, pass through the horizontal filter after standing, and introduce the supernatant into the adsorption tank;

[0016] (3) Add a composite adsorbent to the adsorption pool, the composite adsorbent includes activated carbon, humic acid, and active zeolite with a mass ratio of 1:0.2:2; adjust the pH value in the adsorption pool, and the pH adjustment includes three steps, first Adjust the pH value to 4, remove the precipitate, then adjust the pH value to 7, remove the precipitate, then adjust the pH value to 8, stir well, pass through the horizontal filter after standing, and introduce the supernatant to the finishing pool;

[0017] (4) Adjust th...

Embodiment 2

[0019] A method for recycling sewage in the electroplating industry, comprising the following steps:

[0020] (1) The electroplating wastewater is filtered through a grid, and the filtrate enters the flocculation tank;

[0021] (2) Add PAC to the flocculation tank first, after the precipitation is stable, then add PAM, stir and mix well, pass through the horizontal filter after standing, and introduce the supernatant into the adsorption tank;

[0022] (3) Add a composite adsorbent to the adsorption pool. The composite adsorbent includes activated carbon, humic acid, and active zeolite with a mass ratio of 1:0.9:3; adjust the pH value in the adsorption pool. The pH value adjustment includes three steps, first Adjust the pH value to 2.5, remove the precipitate, then adjust the pH value to 4.5, remove the precipitate, then adjust the pH value to 7.5, stir well, pass through the horizontal filter after standing, and introduce the supernatant to the finishing pool;

[0023] (4) A...

Embodiment 3

[0025] A method for recycling sewage in the electroplating industry, comprising the following steps:

[0026] (1) The electroplating wastewater is filtered through a grid, and the filtrate enters the flocculation tank;

[0027] (2) Add PAC to the flocculation tank first, after the precipitation is stable, then add PAM, stir and mix well, pass through the horizontal filter after standing, and introduce the supernatant into the adsorption tank;

[0028] (3) add composite adsorbent in the adsorption pond, composite adsorbent comprises mass ratio and is 1: 1.3):2.4 gac, humic acid, active zeolite; Regulate the pH value in the adsorption pond, the pH value adjustment includes three steps, First adjust the pH value to 3.5 to remove the precipitate, then adjust the pH value to 6, remove the precipitate, then adjust the pH value to 7.5, stir well, pass through the horizontal filter after standing still, and remove the clear liquid introduced into the finishing pool;

[0029] (4) Adj...

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PUM

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Abstract

The invention provides a method for recycling wastewater of electroplating industry. The method comprises the following steps: filtering electroplating wastewater by a grid and feeding a filtrate intoa flocculation basin; adding a flocculant into the flocculation basin, stably precipitating, and then adding a coagulant aid, fully stirring and mixing till the mixture is uniform, standing by and then filtering with a horizontal filter screen, and guiding clean liquor into an adsorption tank; adding a composite adsorbent into the adsorption tank, regulating PH value in the adsorption tank to 2-8, fully stirring till the mixture is uniform, standing by and then filtering with a horizontal filter screen, and guiding clean liquor into a settling tank, wherein the composite adsorbent comprises activated carbon, humic acid and active zeolite at a mass ratio of 1:(0.2-1.3): (2-3); regulating the PH value of solution in the settling tank to 6-7 and temperature at 50-70 DEG C, performing electric flocculation and then performing solid-liquid separation. The method provided by the invention has the beneficial effects that the treated water is ultralow in metal content, contains few soluble gases, is odorless and can be directly discharged.

Description

technical field [0001] The invention relates to a sewage recycling method used in the electroplating industry, and belongs to the technical field of waste water recovery and treatment. Background technique [0002] The electroplating industry is an important processing industry and an indispensable product processing method in many industries such as machinery, electronics, instruments, meters, light industry, and aerospace. The water quality of electroplating wastewater is complex, involving a variety of heavy metal ions and other harmful substances, which are extremely harmful to humans. If these electroplating wastewater does not meet the discharge standards and enters the environment directly, it will definitely cause extensive and serious harm to the ecological environment and human beings. The electronic electroplating industry is also one of the key industries for the control of heavy metal pollution in Jiangsu Province. The wastewater discharged during the productio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F101/20C02F103/16
CPCC02F1/001C02F1/281C02F1/283C02F1/286C02F1/463C02F1/5236C02F1/56C02F1/66C02F9/00C02F2101/20C02F2103/16
Inventor 姜守国
Owner 襄阳先创环保科技有限公司
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