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Advanced treatment technology for wastewater

A treatment process and advanced treatment technology, which is applied in the direction of processing wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. It can solve the problems of large amount of chemicals used, high economic cost, and unstable effluent. , to save economic costs, increase reaction efficiency, and reduce the amount of chemicals used

Active Publication Date: 2017-03-22
TIANJIN CARING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ordinary Fenton oxidation process has problems such as low reaction efficiency, unstable effluent, large amount of chemicals used, and high economic costs.

Method used

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Examples

Experimental program
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Effect test

Embodiment 4

[0044] Embodiment 4 simulates the treatment of the above-mentioned wastewater by the advanced treatment process of the present invention through a small test, and Comparative Example 4 simulates the treatment of the wastewater by the traditional Fenton process through a small test. In Example 4 and Comparative Example 4, the dosages of hydrogen peroxide and ferrous sulfate were the same, and the COD of the final effluent was investigated.

[0045]Those skilled in the art should understand that the treatment process of the biochemical effluent of a certain corrugated paper factory in the present invention is only illustrative, and the advanced treatment process of the present invention can be applied to the treatment of any other type of wastewater.

Embodiment 1

[0047] According to the following steps, the above-mentioned waste water is treated:

[0048] (1) Add 98% concentrated sulfuric acid to the first adjustment tank to adjust the pH of the wastewater to 4-5 to obtain regulated wastewater, wherein 1.5 kg of concentrated sulfuric acid is added per ton of wastewater.

[0049] (2) the regulated waste water is delivered to two mutually independent units of the dosing pool, and to these two units, adding the concentration of 27.5% hydrogen peroxide solution and the concentration of 15% ferrous sulfate solution respectively, so that The hydrogen peroxide solution and the ferrous sulfate solution are respectively mixed with the waste water to obtain the first waste water and the second waste water. Among them, the amount of hydrogen peroxide used in each ton of regulated wastewater is 0.5kg, pure FeSO 4 ·7H 2 The amount of O used was 1 kg.

[0050] (3) Contact and react the first waste water and the second waste water in the reaction ...

Embodiment 2

[0054] According to the following steps, the above-mentioned waste water is treated:

[0055] (1) Add 98% concentrated sulfuric acid in the first adjustment tank, adjust the pH of the above wastewater to 4-5, and obtain adjusted wastewater, wherein 1 kg of concentrated sulfuric acid is added to each ton of wastewater.

[0056] (2) the regulated waste water is delivered to two mutually independent units of the dosing pool, and to these two units, adding the concentration of 27.5% hydrogen peroxide solution and the concentration of 15% ferrous sulfate solution respectively, so that The hydrogen peroxide solution and the ferrous sulfate solution are respectively mixed with the waste water to obtain the first waste water and the second waste water. Among them, the amount used in each ton of regulated wastewater is 1kg, pure FeSO 4 ·7H 2 The amount of O used was 1.5 kg.

[0057] (3) Contact the first wastewater and the second wastewater in the reaction tank and react for 1 hour ...

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Abstract

The invention discloses an advanced treatment technology for wastewater. The technology comprises following steps: wastewater subjected to biochemical treatment is sent to a first regulating tank, pH is regulated to be 4-5, and regulated wastewater is obtained; the regulated wastewater is sent to a chemical feeding tank, the chemical feeding tank comprises two completely isolated units with the same size, a hydrogen peroxide solution and a ferrous sulfate solution are added to the two units respectively and mixed with the regulated wastewater respectively, and first mixed wastewater and second mixed wastewater are obtained; the first mixed wastewater and the second mixed wastewater are sent to a reaction tank for reaction, and a mixed solution is obtained; the mixed solution is sent to a second regulating tank, pH is regulated to be 6-7, and a regulated mixed solution is obtained; the regulated mixed solution is sent to a flocculation and sedimentation tank for flocculation and sedimentation. With the adoption of the treatment technology, the problems of overhigh side reaction flux, reduced main reaction efficiency, chemical waste and the like caused by overhigh local chemical concentration in the reaction tank can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a novel advanced treatment process for wastewater. Background technique [0002] Among the water pollution caused by human production activities, the water pollution caused by industry is the most serious. For example, industrial wastewater contains many pollutants and complex components. It is not only difficult to purify in water, but also difficult to treat. Industrial wastewater is the most important cause of water pollution caused by industrial pollution. It accounts for the majority of pollutants emitted by industry. The pollutants contained in industrial wastewater vary widely depending on the type of factory. Even in the same factory, the quality and quantity of pollutants contained in them are different due to different production processes. In addition to the pollution caused by the direct injection of industrial waste water into the water bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/28
Inventor 薛二军王晓阳张麟李红霞
Owner TIANJIN CARING TECH DEV
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