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Method for treating waste water in multi-stage catalytic oxidation and microelectrolysis method

A technology for catalytic oxidation and waste water treatment, applied in water/sewage multi-stage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. Strength and other issues, to achieve good coagulation effect, low investment cost, easy operation and maintenance

Inactive Publication Date: 2012-07-18
ZIBO GAOHUI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the traditional treatment process of high-salt, high-concentration and high-COD wastewater, especially for the treatment of difficult wastewater such as rubber accelerators M, DM, NS, and CZ, the following two methods are commonly used: one is to simply use the Fenton method to treat wastewater, The processing cost of this process is high and produces more iron sludge, which limits the popularization and application of Fenton's method; the second is Fenton's enhanced iron filings internal electrolysis process. The disadvantage of this process is: iron filings run in the container After about 3 months, there will be agglomeration and hardening, and it needs to be replaced again, which consumes a lot of manpower and material resources, increases labor intensity, and is not suitable for promotion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The method for treating waste water by the described multistage catalytic oxidation plus micro-electrolysis method comprises the following steps:

[0052] (1) Pretreatment: First, filter the waste water flowing into the regulating tank with three-stage cloth bags, and then use the aeration method to aerate for 30 minutes to carry out the pretreatment process, and the COD degradation of the waste water is 500mg / L;

[0053] (2) Aeration acid analysis: with sulfuric acid, the pH value of the pretreated waste water in step (1) is adjusted to 3, and the aeration acid analysis enters the fiber ball filter for 30 minutes to filter, and the product of acid precipitation is filtered out, and the waste water COD degradation 300mg / L, the ratio of sulfuric acid addition to the total volume of wastewater is 1kg / m 3 ;

[0054] (3) Micro-electrolysis: The waste water filtered in step (2) is put into the reaction tower equipped with micro-electrolysis fillers in the way of low inflow ...

Embodiment 2

[0061] The method for treating waste water by the described multistage catalytic oxidation plus micro-electrolysis method comprises the following steps:

[0062] (1) Pretreatment: Firstly, filter the wastewater flowing into the regulating tank with three-stage cloth bags, and then use the aeration method to aerate for 60 minutes for pretreatment process, and the COD degradation of wastewater is 600mg / L;

[0063] (2) Aeration acid analysis: with hydrochloric acid, step (1) is adjusted to 3.5 through the pH value of the pretreated waste water, and aeration acid analysis enters fiber ball filter to filter for 35 minutes, the product of acid precipitation is filtered out, waste water COD degrades 300mg / L, and the ratio of sulfuric acid addition to the total volume of wastewater is 0.6kg / m 3 ;

[0064] (3) Micro-electrolysis: The waste water filtered in step (2) is put into the reaction tower equipped with micro-electrolysis fillers in the way of low inflow and high outflow, and t...

Embodiment 3

[0071] The method for treating waste water by the described multistage catalytic oxidation plus micro-electrolysis method comprises the following steps:

[0072] (1) Pretreatment: Firstly, filter the wastewater flowing into the regulating tank with a three-stage cloth bag, and then use the aeration method to aerate for 90 minutes to carry out the pretreatment process, and the COD of the wastewater is degraded to 700mg / L;

[0073] (2) Aeration acid analysis: with sulfuric acid, the pH value of the pretreated waste water in step (1) is adjusted to 3, and the aeration acid analysis enters the fiber ball filter for 30 minutes to filter, and the product of acid precipitation is filtered out, and the waste water COD degrades 400mg / L, and the ratio of sulfuric acid addition to the total volume of wastewater is 0.8kg / m 3 ;

[0074] (3) Micro-electrolysis: The waste water filtered in step (2) is put into the reaction tower equipped with micro-electrolysis fillers in the way of low inf...

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Abstract

The invention relates to treatment of organic waste water, in particular to a method for treating waste water in a multi-stage catalytic oxidation and microelectrolysis method, which includes comprises the following steps: pretreatment, aeration acidification, microelectrolysis, first-level catalytic oxidation treatment, aeration reaction, primary sedimentation, secondary catalytic oxidation treatment and secondary sedimentation. The COD index of treated waste water is 100-300mg / L. The method has the advantages of being high in reaction speed, simple in process flow, long in service life, less in investment cost, convenient to operate and maintain, low in operation cost and stable in treatment effect.

Description

technical field [0001] The invention relates to the treatment of organic wastewater, in particular to a method for treating wastewater by multistage catalytic oxidation plus micro-electrolysis. Background technique [0002] In the traditional treatment process of high-salt, high-concentration and high-COD wastewater, especially for the treatment of difficult wastewater such as rubber accelerators M, DM, NS, and CZ, the following two methods are commonly used: one is to simply use the Fenton method to treat wastewater, The processing cost of this process is high and produces more iron sludge, which limits the popularization and application of Fenton's method; the second is Fenton's enhanced iron filings internal electrolysis process. The disadvantage of this process is: iron filings run in the container Caking and hardening will occur after about 3 months, and it needs to be replaced again, which consumes a lot of manpower and material resources, increases labor intensity, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 蔡强蔡超蔡帅
Owner ZIBO GAOHUI CHEM
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