Method for pretreating wastewater in industrial zone based on coupling oxidation of catalyzed iron reduction and application thereof

An industrial park, catalytic iron technology, applied in water/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. The effect of improving the biodegradability of wastewater, low solid waste disposal cost, and low solid waste generation

Inactive Publication Date: 2017-05-17
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problems of cumbersome acid-base adjustment, large dosage of chemicals, large output of iron slime, and unstable operation in existing industrial park wastewater pretreatment, the present invention provides a method for pretreatment of industrial park wastewater based on catalytic iron reduction coupled oxidation and its Firstly, the use of catalytic iron reduction to improve the biodegradability of wastewater and reduce the biological toxicity of wastewater; secondly, to use coupled strong oxidation to open and break the refractory macromolecular pollutants in wastewater into small molecules that are suitable for biodegradation. Improve the biodegradability of wastewater; can effectively improve the biodegradability of industrial park wastewater and reduce the biotoxicity of wastewater

Method used

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  • Method for pretreating wastewater in industrial zone based on coupling oxidation of catalyzed iron reduction and application thereof
  • Method for pretreating wastewater in industrial zone based on coupling oxidation of catalyzed iron reduction and application thereof
  • Method for pretreating wastewater in industrial zone based on coupling oxidation of catalyzed iron reduction and application thereof

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Effect test

Embodiment 1

[0037]An industrial park in Jiangsu is mainly a printing and dyeing and fine chemical enterprise. 3 / d design, the wastewater has the characteristics of high bioinhibition toxicity, poor biodegradability, and large fluctuations in water quality. The specific raw wastewater quality is shown in Table 1. After pretreatment, the wastewater enters the subsequent biochemical and advanced treatment units, and the final treated effluent meets the standard and is discharged to natural water bodies.

[0038] 1) The industrial wastewater in the park is first collected into the wastewater regulating tank. The residence time of the regulating tank is 24 hours. The perforated tube is used to aerate and stir for homogenization, and the pH in the tank is controlled to be 6.5-8.5.

[0039] 2) The waste water in the adjustment pool is lifted to the catalytic iron reduction pool by the pump, and the filler in the pool is copper-plated iron shavings, and the copper plating rate is 0.15% (mass rat...

Embodiment 2

[0047] A certain chemical industry park in Jiangsu is mainly pharmaceutical, dyestuff and chemical enterprises. 3 / d design, the wastewater has the characteristics of high bioinhibition toxicity, poor biodegradability, and large fluctuations in water quality. The specific raw wastewater quality is shown in Table 2. After pretreatment, the wastewater enters the subsequent biochemical and advanced treatment units, and is discharged to natural water bodies after the final treatment reaches the standard.

[0048] 1) The industrial wastewater in the park is first collected into the wastewater regulating tank. The residence time in the regulating tank is 24 hours. It is homogenized by perforating and stirring, and the pH in the tank is controlled at 6.5-8.5.

[0049] 2) The wastewater from the adjustment pool is pumped up to the catalytic iron reduction pool. The filler in the pool is copper-plated iron shavings, and the copper plating rate is 0.25%. (Mass ratio) The preparation me...

Embodiment 3

[0057] An industrial park in Jiangsu is mainly pharmaceutical, pesticide, and chemical companies. The pretreatment volume of wastewater in the park in the embodiment of the present invention is based on 20000m 3 / d design, the wastewater has the characteristics of high bioinhibitory toxicity, poor biodegradability, and large fluctuations in water quality. The specific raw wastewater quality is shown in Table 3. After pretreatment, the wastewater enters the subsequent biochemical and advanced treatment units, and the final treated effluent meets the standard and is discharged to natural water bodies.

[0058] 1) The industrial wastewater in the park is first collected into the wastewater regulating tank. The residence time in the regulating tank is 24 hours. It is homogenized by perforating and stirring, and the pH in the tank is controlled at 6.5-8.5.

[0059] 2) The wastewater from the adjustment pool is pumped to the catalytic iron reduction pool, and the filler in the pool ...

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Abstract

The invention discloses a method for pretreating wastewater in an industrial zone based on coupling oxidation of catalyzed iron reduction and an application thereof, and belongs to the technical field of organic industrial wastewater treatment. The process is carried out as described in the description. According to the characteristics of wastewater quality of an industrial zone, a treatment technology based on coupling oxidation of catalyzed iron reduction is adopted, an industrial zone wastewater pretreatment technology of 'reductively promoting wastewater B / C and reducing biotoxicity and oxidatively subtracting biologically inhibited organic pollutant ingredients' is developed, the wastewater biodegradability can be remarkably improved, and toxic action of toxic substances in waste water on microorganisms can be effectively reduced. The method has the advantages of stable treatment effect and strong impact resistance, provides excellent pretreatment technical guarantee to up-to-standard emission of wastewater treatment in the industrial zone and upgrading and reconstruction, and has an excellent popularization and application prospect.

Description

technical field [0001] The invention belongs to the technical field of organic industrial wastewater treatment, and more specifically relates to a method for pretreatment of industrial park wastewater based on catalytic iron reduction coupling oxidation and its application. Background technique [0002] In recent years, as the country has paid more and more attention to environmental protection issues, the requirements for effluent water quality and effluent compliance rate of industrial park sewage treatment plants have become increasingly strict. Therefore, the problem of excessive effluent water from industrial park sewage treatment plants has become the key to restricting the sustainable development of industrial parks. Carry out research on wastewater treatment technology in industrial parks, provide technical support for wastewater treatment in industrial parks, and play a vital role in effectively solving the problem of excessive sewage treatment plants in industrial p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06
CPCC02F1/4678C02F1/56C02F1/66C02F1/722C02F9/00
Inventor 周宗远吕路张炜铭张猛汪林
Owner NANJING UNIV
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