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Coupled processing method of waste water in chemical industry plant area

A treatment method and technology of a chemical plant, applied in chemical instruments and methods, water/sewage multi-stage treatment, adsorption water/sewage treatment, etc. Complicated components and other issues, to achieve the effect of enhancing the effect of flocculation and filtration, reducing the content of toxic and harmful substances, and reducing operating costs

Active Publication Date: 2012-07-04
江苏省环境工程技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Biochemical method is currently one of the most economical and effective methods for removing organic matter. It has been widely used in chemical wastewater treatment. However, because organisms have certain requirements on conditions such as pH, nutrients, and temperature, it is often difficult to adapt to the large changes in chemical wastewater quality. , complex components, high toxicity, and difficult to degrade, it is difficult to treat chemical wastewater with biochemical methods to meet the standards
[0005] Due to the complex composition of chemical wastewater, the volatility is large
In the past, chemical oxidation, adsorption separation and other technologies were often used for treatment, which required large investment and high operating costs.
However, pure biochemical treatment is affected by heavy metals and toxic and harmful organic substances in wastewater, and the effect is poor.

Method used

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  • Coupled processing method of waste water in chemical industry plant area
  • Coupled processing method of waste water in chemical industry plant area
  • Coupled processing method of waste water in chemical industry plant area

Examples

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Embodiment 1

[0032] In a chemical company, a total of 3 high-concentration wastewater discharges.

[0033] One comes from the high boiling point solvent MADE (dibasic acid ester mixture) production workshop. The solvent MADE is produced from succinic acid, glutaric acid, adipic acid and methanol esterification reaction under the catalysis of nitric acid to produce mixed fat. The mixed fat neutralization section is divided into The water phase is discharged as wastewater, and its main components are nitrate, methanol, succinic acid, glutaric acid, adipic acid and mixed fats (dimethyl succinate, dimethyl glutarate, dimethyl adipate ester), copper ions, iron ions and other organic impurities, the COD is as high as 120000mg / L.

[0034] The second stream is the regular kettle washing water for paint production. The volume of waste water in this stream is relatively small, and the COD is about 60,000 mg / L.

[0035] The third stream comes from the alkyd resin workshop. The wastewater mainly cont...

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Abstract

The invention discloses a coupled processing method of waste water in chemical industry plant area. After being pretreated by coagulating sedimentation, high-density waste water in the chemical industry plant area is mixed with low-density waste water; the mixed waste water successively enters a first-grade aerobic system and a second-grade aerobic system after being treated by a two-phase anaerobic reactor; and then, the treated mixed waste water is purified and filtered by a kieselguhr treating pond for discharging after reaching the standard. The invention combines multiple processes, such as coagulating sedimentation, two-phase anaerobism, second-grade aerobic technology, kieselguhr processing and the like and has favorable processing effect, stable operation and favorable economy. The invention has favorable purifying effect on high-density chemical sewage, and processing effluent can reach the strictest requirements of current effluent standard in China.

Description

technical field [0001] The invention belongs to the field of sewage treatment engineering, and in particular relates to a coupling treatment method for wastewater in chemical enterprises. Background technique [0002] With the development of the chemical industry, the discharge of pollutants in the production process of chemical products is also increasing continuously. The discharge of water pollutants in the chemical production process is one of the main sources of water environmental pollution, especially the discharge of fine chemical products in the production process. Most of the water-polluting organic substances are complex in structure, toxic and harmful, and difficult to degrade. Therefore, it is difficult to treat chemical wastewater. [0003] The basic characteristics of chemical wastewater are: (1) The water quality is complex, and the wastewater often contains raw and auxiliary materials, products, solvents, various by-products and various impurities; (2) The p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/52C02F3/30C02F1/28
Inventor 邹敏陆继来梁志冉俞茂良金坚吴剑
Owner 江苏省环境工程技术有限公司
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