Film treatment method for wastewater produced by synthetic rubber

A technology for the production of wastewater and synthetic rubber, which is applied in the fields of water/sewage multi-stage treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problem that the organic substances that are difficult to biochemically degrade cannot be effectively removed, and the membrane system is not running well. impact, etc.

Active Publication Date: 2010-06-09
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 existing technology, when the secondary biochemical treatment effluent of rubber production wastewater is treated with membrane separation method, the organic matter that is difficult to biodegrade cannot be effectively removed, which will cause adverse effects on the operation of the membrane system. The present invention provides a "catalytic Oxidation + coagulation sedimentation + ultrafiltration + reverse osmosis" treatment process, through the economical and efficient pretreatment process, removes the refractory organic matter in the wastewater, ensuring the stable and efficient operation of the membrane separation system

Method used

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  • Film treatment method for wastewater produced by synthetic rubber
  • Film treatment method for wastewater produced by synthetic rubber

Examples

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Embodiment 1

[0041] Synthetic rubber production wastewater (including butadiene rubber and styrene-butadiene rubber production wastewater) after secondary biochemical treatment in a factory has a pH of 6.2, a COD of 101mg / L, a TOC of 31.6mg / L, and a conductivity of 4460μm / cm.

[0042] The wastewater is taken from the effluent of the secondary sedimentation tank, and firstly undergoes catalytic oxidation treatment. The catalytic oxidation conditions are: reaction temperature 25°C, reaction pressure normal pressure; 27.5% hydrogen peroxide is added to the wastewater with a dosage pump, of which H 2 o 2 The weight ratio to the wastewater TOC is 5.0; add ferrous sulfate to the wastewater, where Fe 2+ H in the oxidizing agent 2 o 2 The weight ratio is 0.8; aeration is used for stirring and mixing, and the reaction residence time is 120min.

[0043] The effluent is catalyzed and oxidized, pressurized into the coagulation device, mixed with 15% NaOH solution through the pipeline mixer, and a...

Embodiment 2

[0049] The synthetic rubber production wastewater of a factory after secondary biochemical treatment has a pH of 6.7, a COD of 90 mg / L, a TOC of 27 mg / L, and an electrical conductivity of 3850 μm / cm.

[0050] Catalytic oxidation treatment is carried out on the wastewater, and the catalytic oxidation conditions are: removal of H 2 o 2 The weight ratio to the wastewater TOC is 3.0; add ferrous sulfate to the wastewater, where Fe 2+ H in the oxidizing agent 2 o 2 The weight ratio is 0.4; the reaction residence time is 90min.

[0051] Use 15% NaOH solution to adjust the pH of the catalytic oxidation water to 10.5, use aeration and coagulation for 10 minutes, and enter the sedimentation tank for slag water separation. The rising flow rate of the sedimentation tank is 1m / h.

[0052] The effluent from the sedimentation tank first passes through a 100μm laminated filter, and the pH of the effluent from the filter is roughly adjusted to 8.5 with hydrochloric acid, and 5mg / L of sodi...

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Abstract

The invention provides a film treatment method for wastewater produced by synthetic rubber treated by secondary biochemical treatment. The method adopts the treatment procedures of catalytic oxidation, coagulating sedimentation, ultrafiltration and reverse osmosis and comprises the following steps of: firstly, taking oxydol as an oxidant and ferrous sulfate as a catalyst, carrying out catalytic oxidation treatment on wastewater, removing COD which is difficult to degrade in the wastewater mainly, then removing iron and suspended substances by coagulating sedimentation, afterwards removing colloid and the residual particle substances by ultrafiltration and finally, carrying out desalting treatment by reverse osmosis. Because film pretreatment effectively removes organic substances which have larger influence on the running of a film system, the method has the characteristics of superior water quality of effluent water and long-time and stable running.

Description

technical field [0001] The invention relates to a treatment method of chemical wastewater, more specifically, to a membrane treatment method of synthetic rubber production wastewater. Background technique [0002] Synthetic rubber is polymerized from petrochemical intermediate products and is mainly used to manufacture automobile tires. It is widely used in rubber shoes, rubber hoses, tapes, rubber sheets, cables and medical appliances. Synthetic rubber production wastewater has the characteristics of large discharge volume, complex water quality, high organic content, poor biodegradability, and difficult treatment. [0003] At present, the treatment of wastewater from synthetic rubber production is basically a combination of pretreatment and biochemical treatment, and the research and development of related technologies also focuses on how to improve the efficiency of pretreatment and biochemical treatment. The pretreatment measures of synthetic rubber production wastewate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/72C02F1/52C02F1/44
Inventor 赵辉程学文刘正栾金义杨永强张申龚小芝孙杰赵鹏
Owner CHINA PETROLEUM & CHEM CORP
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