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Water treatment method for reducing COD value of graphene water-based waste liquid

A kind of water-based and water treatment technology, applied in the field of water treatment, can solve the problems of environmental pollution, high treatment cost, and difficulty in achieving standard discharge, and achieve the effect of simple and convenient treatment method

Pending Publication Date: 2021-10-29
天津艾克凯胜石墨烯科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the rapid development of my country's chemical industry, various new chemical products are applied to all walks of life, especially in heavy polluting industries such as medicine, chemical industry, electroplating, printing and dyeing. The environmental pollution problems are mainly manifested in: the concentration of organic pollutants in wastewater is high, the structure is stable, and the biochemical properties are poor. It is difficult to achieve standard discharge by conventional processes, and the treatment cost is high, which brings great pressure on energy conservation and emission reduction of enterprises.

Method used

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  • Water treatment method for reducing COD value of graphene water-based waste liquid
  • Water treatment method for reducing COD value of graphene water-based waste liquid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 0.5mL of ferrous sulfate solution with a mass concentration of 8% to 150mL of aqueous waste liquid with a solid content of less than 0.3%, and stir; then add 1mL of hydrogen peroxide solution, stir, stand still, filter, and take the supernatant; Add a 12% sodium hydroxide solution to the supernatant to adjust the pH of the supernatant to 9; then add polyacrylamide with a molecular weight of 8 million, stir and filter, and test the COD value of the filtrate.

Embodiment 2

[0028] Add 1mL of ferrous sulfate solution with a mass concentration of 10% to 200mL of aqueous waste liquid with a solid content of less than 0.3%, and stir; then add 1.5mL of hydrogen peroxide solution, stir, stand still, filter, and take the supernatant; Add a sodium hydroxide solution with a mass concentration of 8% to the supernatant to adjust the pH of the supernatant to 8; then add polyacrylamide with a molecular weight of 10 million, stir and filter, and test the COD value of the filtrate.

Embodiment 3

[0030] Add 1.5mL of ferrous sulfate solution with a mass concentration of 12% to 250mL of aqueous waste liquid with a solid content of less than 0.3%, and stir; then add 1.5mL of hydrogen peroxide solution, stir, stand still, filter, and take the supernatant Add 10% sodium hydroxide solution to the supernatant to adjust the pH of the supernatant to 10; then add polyacrylamide with a molecular weight of 15 million, stir and filter, and test the COD value of the filtrate.

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Abstract

The invention provides a water treatment method for reducing the COD value of graphene water-based waste liquid, which comprises the steps of S1, adding a ferrous sulfate solution into graphene water, and stirring; S2, adding a hydrogen peroxide solution into the solution obtained in the step S1, stirring, and standing; S3, filtering the solution obtained in the step S2, and taking supernate; S4, adding a sodium hydroxide solution into the supernate; and S5, adding a cationic flocculant into the solution obtained in the step S4, stirring, and filtering. The graphene water-based waste liquid treatment method is simple and convenient, the removal rate of COD in the graphene water-based waste liquid reaches 97% or above, and the treated graphene water-based waste liquid meets the discharge standard.

Description

technical field [0001] The invention relates to a water treatment method for reducing the COD value of graphene aqueous waste liquid, and belongs to the technical field of water treatment. Background technique [0002] The treatment of organic wastewater, especially high-salt and high-concentration organic wastewater, has always been a problem of concern to many domestic environmental protection workers and management departments. With the rapid development of my country's chemical industry, various new chemical products are applied to all walks of life, especially in heavy polluting industries such as medicine, chemical industry, electroplating, printing and dyeing. The environmental pollution problems are mainly manifested in: the concentration of organic pollutants in wastewater is high, the structure is stable, and the biochemical properties are poor. Conventional processes are difficult to achieve discharge standards, and the treatment costs are high, which brings great ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
CPCC02F9/00C02F1/66C02F1/001C02F1/722C02F1/56C02F1/5236
Inventor 李智陈莉
Owner 天津艾克凯胜石墨烯科技有限公司