Treatment method of phenolic wastewater in production of sebacic acid

A treatment method, sebacic acid technology, is applied in natural water treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. It can solve the problems of high treatment cost, large energy consumption, and large equipment investment. Achieve the effects of reduced processing cost, reduced investment in extraction process, and simple extraction process

Inactive Publication Date: 2015-12-23
BLUESTAR LEHIGH ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a direct biochemical treatment method for high-salt and phenol-containing wastewater in the production of sebacic acid after single-stage extraction, so as to avoid the current treatment process of sebacic acid-containing phenol-containing wastewater The defects of multi-stage extraction, evaporation and desalination, such as high energy consumption, long steps, large equipment investment, and high treatment cost, provide technical support for sebacic acid production enterprises to treat such high-salt and phenol-containing wastewater

Method used

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  • Treatment method of phenolic wastewater in production of sebacic acid
  • Treatment method of phenolic wastewater in production of sebacic acid
  • Treatment method of phenolic wastewater in production of sebacic acid

Examples

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Embodiment 1

[0033] Example 1, a treatment method for phenol-containing wastewater in the production of sebacic acid: the high-salt phenol-containing wastewater in the production of sebacic acid is first extracted with an extractant to remove phenol, and then biochemically treated with salt-suitable microorganisms to make the COD in the wastewater Cr and volatile phenols up to the standard, while recovering phenolic substances in the wastewater; the extractant is selected from at least one of phosphoric acid esters, alkylamines, castor oil, kerosene or diesel or a mixture thereof.

Embodiment 2

[0034] Example 2, in the treatment method of phenol-containing wastewater in the production of sebacic acid described in Example 1: extraction means that the wastewater and the extractant are fully mixed at a ratio of 0.5:1 to oil and water, and the pH of the mixture of the extractant and the wastewater is adjusted The value is 2; then the mixture is left to stand and stratified. The extracted phase after stratification is the loaded extractant and sent to the stripping process for regeneration. The raffinate phase after stratification is neutralized in water after extraction to a pH of 6. deal with.

Embodiment 3

[0035] Example 3, in the treatment method of phenol-containing wastewater in the sebacic acid production described in Example 1: extraction refers to fully mixing the wastewater with the extractant at a ratio of 4:1 to oil and water, and adjusting the pH of the mixture of the extractant and the wastewater The value is 3; then the mixture is allowed to stand and stratified. The extracted phase after stratification is the loaded extractant and sent to the stripping process for regeneration. The raffinate phase after stratification is neutralized in water after extraction to a pH of 9. deal with.

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Abstract

The invention relates to a treatment method of phenolic wastewater in production of sebacic acid. The treatment method comprises the steps that high salt phenolic wastewater is subjected to extracting and phenol removing by an extraction agent, and then biochemical treatment is performed by using halophilic microorganisms, so that CODCr and volatile phenol in the wastewater can reach the standard, meanwhile phenolic substances in the wastewater are recycled; the extraction agent is selected from at least one of phosphate esters, alkylamines, castor oil, kerosene or diesel oil or a mixture thereof. The treatment method adopts a method of combination of physical and chemical extraction and halophilic microorganism biochemical treatment, by firstly utilizing an efficient extraction agent, the phenolic substances in the wastewater are removed and recycled, meanwhile the CODCr and the phenol concentration of the wastewater are reduced; then by utilizing halophilic microorganism flora, the extracted wastewater is not subjected to a desalination technology or attenuation, but the biochemical treatment is performed directly, so that the CODCr and the phenol content in the wastewater can reach the standard, and the wastewater treatment cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of high-salt chemical wastewater treatment, and specifically relates to a method for treating high-salinity, high-COD Cr , High phenolic, difficult to biochemical treatment of sebacic acid production process phenolic wastewater treatment method. Background technique [0002] The domestic sebacic acid production method mainly adopts the benzene (methyl) phenol dilution method, and a large amount of phenol-containing wastewater is produced in the production. The production of 1 ton of sebacic acid produces about 25-50 m of phenol-containing wastewater. 3 , pH value is 2~3, phenol mass concentration is 4000~5000mg / L, COD Cr It can reach 10000-20000mg / L, and also contains 6%-15% sodium sulfate, which belongs to high-salt wastewater, which will cause serious harm to the environment if not treated. [0003] The treatment technologies for industrial phenolic wastewater mainly include chemical methods (chemical ox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C07C37/72C07C39/04C07C39/07C07C39/00C02F103/36
Inventor 云干徐军王开春李坤董自斌赵焰刘娟胡聪
Owner BLUESTAR LEHIGH ENG INST CO LTD
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