Process for processing high concentration refractory organic wastewater containing paratoluidine

A technology of organic wastewater and p-toluidine, applied in water/sewage treatment, neutralized water/sewage treatment, oxidized water/sewage treatment, etc., can solve ecological environmental pollution, restrict sustainable development and other problems, and achieve ecological protection Environment, protection of copper mine development, and the effect of simple and easy treatment methods

Inactive Publication Date: 2009-03-04
ZIJIN MINING GROUP
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  • Application Information

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Problems solved by technology

If effective control and treatment are not carried out, serious ecological environmental pollution will be caused, which not only restricts

Method used

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  • Process for processing high concentration refractory organic wastewater containing paratoluidine
  • Process for processing high concentration refractory organic wastewater containing paratoluidine
  • Process for processing high concentration refractory organic wastewater containing paratoluidine

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Embodiment Construction

[0025] Such as figure 1 As shown, the treatment process containing high-concentration p-toluidine refractory organic wastewater includes the following sequential process steps:

[0026] a. Physicochemical pretreatment. Firstly, the organic wastewater is subjected to water collection adjustment and mechanical oil separation process to separate and remove oily substances, then add lime to adjust the pH value to 3-4, and then add iron and carbon for micro-electrolysis Reaction, the reaction time is 4 to 6 hours, and finally lime is added for neutralization and precipitation, and the pH value rises to 7 to 8 to remove most of the COD of the wastewater, improve the biodegradability of the wastewater, and separate the sediment;

[0027] b. Microbial anaerobic hydrolysis and acidification treatment, the waste water that has undergone physical and chemical pretreatment is passed into the cultivated and domesticated microorganisms for facultative hydrolysis and acidification, and the h...

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Abstract

The invention relates to a treatment process of paratoluidine-containing high-concentration hard-to-degrade organic wastewater. The treatment process comprises the following steps: physiochemical pretreatment: by the wastewater collection and control, the mechanical oil removal, the pH regulation, the micro-electrolysis reaction and the neutralization and settlement, most of chemical oxygen demand (COD) of wastewater is removed and the biodegradability of wastewater is improved; microbial anaerobic hydrolysis acidification treatment: after the physiochemical pretreatment, the wastewater undergoes the facultative hydrolysis and acidification using the cultured domesticated microorganisms, so that the macromolecular organic substances are degraded, the biodegradability is further improved, the COD of wastewater is partially removed, and the sludge is separated; two-stage aerobic biochemical treatment: the compressed air is introduced, the pH value is regulated, and the pollutants such as COD residues and suspended substances (SS) are removed; and deep oxidation treatment: Fenton reagent is adopted in the deep oxidation treatment, colority and COD are further removed, the neutralization, coagulation and settlement is carried out, the settled materials are collected, and the treatment effluent meets the standards and is discharged or recycled in the production process. The invention has the characteristics of simple and easy operation and easily-accessible low-price treatment agents.

Description

1. Technical field [0001] The invention relates to a chemical wastewater treatment technology, in particular to a treatment process for high-concentration p-toluidine-containing refractory organic wastewater, which is suitable for fine chemical, pharmaceutical, papermaking, printing and dyeing and other industries. 2. Background technology [0002] At present, the more advanced and commonly used copper extraction and mineral processing agents are synthesized and compounded from raw materials such as nonylphenol, p-toluidine, formaldehyde, propionyl chloride, anhydrous aluminum trichloride and hydroxylamine hydrochloride, and produce odor during the production process. High-concentration, refractory acidic organic wastewater with high concentration, large chroma, slick oil, and complex components. After testing, the content of toluidine in this type of wastewater is 3000-4500mg / L, and the content of potassium dichromate oxidized chemical oxygen demand (CODcr) 8000~12000mg / L, ...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/40C02F1/66C02F1/461C02F3/30C02F1/72C02F1/52
Inventor 华金铭郭晓珊曾佳伟朱秋华梁春来邹来昌陈景河
Owner ZIJIN MINING GROUP
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