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Advanced treatment method for wastewater produced by synthetic rubber

A technology for producing waste water and synthetic rubber, which is applied in water/sewage treatment, multi-stage water/sewage treatment, oxidized water/sewage treatment, etc. It can solve the problems of unstable operation effect and high overall cost, and achieve stable and reliable treatment effect, Low investment and easy industrial application

Active Publication Date: 2012-10-24
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to overcome the problems that the overall cost is high and the operation effect is not stable enough in the advanced treatment of synthetic rubber production wastewater, the present invention provides an advanced treatment method for catalytic oxidation of wastewater by using hydrogen peroxide and ferrous sulfate, which can not only obtain satisfactory The treatment effect is low, and the overall cost is low, and the operation is stable and reliable.

Method used

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  • Advanced treatment method for wastewater produced by synthetic rubber

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Effect test

Embodiment 1

[0029] The effluent from the secondary biochemical treatment of wastewater produced by a synthetic rubber factory has a pH of 6.2, a COD of 112mg / L, and a TOC of 31mg / L.

[0030] First, the wastewater is treated by catalytic oxidation, and the treatment conditions are as follows: the reaction temperature is 25°C, and the reaction pressure is normal pressure; 27.5% hydrogen peroxide is added to the wastewater, where H 2 O 2 The weight ratio of TOC to wastewater is 5.0; ferrous sulfate is added to wastewater, of which Fe 2+ With oxidant H 2 O 2 The weight ratio is 0.8; the reaction residence time is 120min. Then use 10% NaOH solution to adjust the pH of the catalytic oxidation water to 10.5, and mix and stay for 15 minutes. Then carry out slag water separation.

[0031] The COD of the water separated from the slag water is 48mg / L, and the COD removal rate is 57%; the TOC is 19mg / L, and the TOC removal rate is 39%; the total soluble iron is 0.1mg / L.

Embodiment 2

[0033] The effluent from the secondary biochemical treatment of wastewater produced by a synthetic rubber factory has a pH of 8.0, a COD of 85mg / L, and a TOC of 28mg / L.

[0034] First, the wastewater is treated by catalytic oxidation, and the treatment conditions are as follows: the reaction temperature is 50°C; the reaction pressure is normal pressure; 27.5% hydrogen peroxide is added to the wastewater, where H 2 O 2 The weight ratio of TOC to the water phase is 2.0; ferrous sulfate is added to the wastewater, of which Fe 2+ With oxidant H 2 O 2 The weight ratio is 0.4; the reaction residence time is 60min. Then use 10% NaOH solution to adjust the pH of the oxidized water to 10.0, and mix and stay for 15 minutes. Then carry out slag water separation.

[0035] The COD of the water separated from the slag water is 42mg / L, the COD removal rate is 51%; the TOC is 21mg / L, and the TOC removal rate is 25%; the total soluble iron is 0.2mg / L.

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Abstract

The invention provides an advanced treatment method for wastewater produced by synthetic rubber. Aiming at the wastewater produced by the synthetic rubber treated by secondary biochemical treatment, the advanced treatment method comprises the following steps of: adopting oxydol as an oxidant and ferrous sulfate as a catalyst, carrying out catalytic oxidation treatment on the wastewater, transforming an organic contaminant in the wastewater into carbon dioxide and water, then regulating the pH of the wastewater to 7-11, carrying out slag water separation and removing most of iron in the wastewater. By the process, the removing rate of the COD of the wastewater can reach more than 50%, the removing rate of the TOC of the wastewater can reach more than 25%, and the soluble iron content of effluent water can reach less than 0.5mg / L. The invention has the characteristics of good and stable treatment effect, mild operational condition, low whole cost and the like.

Description

Technical field [0001] The invention relates to a method for treating chemical wastewater, more specifically, to a method for advanced treatment of rubber production wastewater. Background technique [0002] Synthetic rubber is mainly used in the manufacture of automobile tires, rubber shoes, hoses, tapes, rubber sheets, cables and medical appliances, etc., and has a wide range of uses. Synthetic rubber production is mainly formed by polymerization, and its production wastewater has the characteristics of large discharge, complex water quality, high organic content, poor biodegradability, and difficult treatment. [0003] At present, the treatment of synthetic rubber production wastewater basically uses a combination of pretreatment and biochemical treatment, and related technology research and development work focuses on how to improve the efficiency of pretreatment and biochemical treatment. The pretreatment measures for synthetic rubber production wastewater mainly include: coa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/72C02F1/62
Inventor 程学文刘正栾金义周霖张申杜蓓赵辉杨永强童健崑
Owner CHINA PETROLEUM & CHEM CORP