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Method for treating high-concentrated non-degradable wastewater by using wastewater containing hydrogen peroxide

A hydrogen peroxide wastewater, high-concentration technology, applied in the directions of oxidized water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of uneconomical application, high cost, high COD, and achieve good Economic benefits, cost savings, significant social and environmental benefits

Inactive Publication Date: 2010-03-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And because of its high COD, the cost of adsorption, membrane treatment and other methods is high, and it is not economical to apply in industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] To treat wastewater from a chemical fiber factory, the mass concentration ratio of hydrogen peroxide to organic matter in wastewater is 1:8, and the hydrogen peroxide content in hydrogen peroxide wastewater is 0.6g / L. The operating conditions are determined as: H 2 o 2 / Fe 2+ (Molar ratio) is 1: 1, and the pH of reaction tank is 3, and the pH of sedimentation tank is 6.5, and the residence time of reaction tank is 30 minutes, and the residence time of sedimentation tank is 3 hours. See Table 1 for the processing results. It can be seen from the results in Table 1 that the biodegradability of the treated mixed wastewater is greatly improved.

[0022] Table 1 Hydrogen peroxide containing wastewater treatment of chemical fiber factory wastewater

[0023] project

Embodiment 2

[0025] To treat the printing and dyeing wastewater of a paper mill, the mass concentration ratio of hydrogen peroxide to organic matter in the wastewater is 1:12, and the hydrogen peroxide content in the hydrogen peroxide wastewater is 0.8g / L. The operating conditions are determined as: H 2 o 2 / Fe 2+ (molar ratio) is 2: 1, and reaction cell pH is 5, The pH of the sedimentation tank is 6.5, the residence time of the reaction tank is 40 minutes, and the residence time of the sedimentation tank is 1 hour. See Table 2 for the processing results. From the results in Table 2, it can be seen that the biodegradability of the treated mixed wastewater is greatly improved

[0026] Table 2 Treatment of printing and dyeing wastewater containing hydrogen peroxide wastewater

[0027] project

Embodiment 3

[0029] To treat wastewater from a chemical plant, the mass concentration ratio of hydrogen peroxide to organic matter in the wastewater is 1:5, and the hydrogen peroxide content in the hydrogen peroxide wastewater is 0.4g / L. The operating conditions are determined as: H 2 o 2 / Fe 2 + (molar ratio) is 1: 1, and the reaction pool pH is 4, The pH of the sedimentation tank is 6.5, the residence time of the reaction tank is 30 minutes, and the residence time of the sedimentation tank is 1.5 hours. See Table 3 for the processing results. It can be seen from the results in Table 3 that the biodegradability of the treated mixed wastewater is greatly improved.

[0030] Table 3 Treatment of chemical wastewater containing hydrogen peroxide wastewater

[0031] project

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PUM

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Abstract

The invention discloses a method for treating high-concentrated non-degradable wastewater by using wastewater containing hydrogen peroxide, which comprises: (1) uniformly mixing the wastewater containing the hydrogen peroxide and the high-concentrated non-degradable wastewater in an oxidation pond, adding acid to adjust the pH value of the wastewater, and adding a catalyst to perform Fenton oxidation reaction; (2) adding an alkali in wastewater obtained after the completion of the oxidation to adjust the pH value of the wastewater, and performing flocculating setting in a settling basin; and (3) treating supernatant and settled sludge respectively after the completion of the settlement. The method treats the high-concentrated non-degradable wastewater by using the wastewater containing thehydrogen peroxide, thereby saving the treatment cost of both the wastewater containing the hydrogen peroxide and the high-concentrated non-degradable wastewater. The method has obvious social benefits and environment protection benefits while creating excellent economic social benefits.

Description

technical field [0001] The invention relates to a treatment method for sewage treatment, in particular to a method for treating high-concentration refractory wastewater with hydrogen peroxide-containing wastewater. Background technique [0002] As an important inorganic chemical product, hydrogen peroxide has a wide range of uses. As an oxidant with good performance, hydrogen peroxide is an important raw material in industrial production, so many factories have built hydrogen peroxide production devices by taking advantage of their own products and resources. At present, most domestic enterprises use the anthraquinone method to produce hydrogen peroxide. Since the production of hydrogen peroxide by anthraquinone method mainly uses heavy aromatic organic compounds such as anthraquinone as raw materials, the wastewater from hydrogen peroxide production mainly contains heavy aromatics and hydrogen peroxide. For the treatment of hydrogen peroxide wastewater, oil separation and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/72C02F1/52
Inventor 高峰张利强李本高桑军强张莉马欣
Owner CHINA PETROLEUM & CHEM CORP
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