Chlopyrifos pesticides waste water treatment process

A chlorpyrifos pesticide and wastewater treatment technology, which is applied in the direction of water/sewage multi-stage treatment, extraction water/sewage treatment, neutralized water/sewage treatment, etc. Toxicity and other problems, to achieve the effect of optimizing the structure of wastewater treatment, saving investment, and saving acid and alkali consumption

Inactive Publication Date: 2008-05-07
山东华阳农药化工集团有限公司
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  • Abstract
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Problems solved by technology

However, there is no mature and effective industrialized treatment method for the wastewater produced in the production process of chlorpyrifos at home and abroad.
This wastewater contains heavy metal copper, CN-R, sulfide, organophosphorus and nitrogen-containing heterocycles and other toxic and harmful pollutants. The B / C ratio is about 0.10. The wastewater has high pollutant concentration, high salt content, High chroma and high toxicity, great toxicity to microorganisms, poor biodegradability, belonging to high-concentration, refractory organophosphorus pesticide wastewater
[0003] At present, the treatment method of domestic chlorpyrifos wastewater is mainly incineration, which consumes a lot of energy and costs high, and at the same time produces a large amount of waste residue, which increases the cost of incineration
Moreover, most of the methods for treating chlorpyrifos wastewater are researches on small-scale technology, and there is no operation of industrialized devices.

Method used

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  • Chlopyrifos pesticides waste water treatment process
  • Chlopyrifos pesticides waste water treatment process

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Chlorpyrifos wastewater from Shandong Huayang Technology Co., Ltd. was used as the water to be treated, and it was treated by acid analysis, complex extraction, Fenton oxidation and catalytic oxidation.

[0024] The specific process steps are as follows:

[0025] 1) Acid analysis: Use pendimethalin acidic wastewater to adjust the chlorpyrifos alkaline wastewater. After the chlorpyrifos wastewater is adjusted, the pH value is controlled at 3, and then filtered through a plate and frame filter press;

[0026] 2) Complex extraction: After acid analysis, the waste water and complex extractant enter into the extraction tower with stirring, and after stirring evenly, stand still for 2 hours to separate layers. The wastewater located in the lower layer of the extraction tower enters the Fenton pool, and the complexed extractant in the upper layer enters the extraction agent regeneration device for reuse;

[0027] 3) Fenton oxidation: Wastewater enters the Fenton pool for Fent...

Embodiment 2

[0034] Chlorpyrifos wastewater from a pesticide factory was used as the untreated water, which was treated by acid analysis, complex extraction, Fenton oxidation and catalytic oxidation.

[0035] The specific process steps are as follows:

[0036] 1) Acid analysis: Use pendimethalin acidic wastewater to adjust chlorpyrifos alkaline wastewater. After the chlorpyrifos wastewater is adjusted, the pH value is controlled at 2, and then filtered through a plate and frame filter press;

[0037] 2) Complex extraction: After acid analysis, the waste water and complex extractant enter into the extraction tower with stirring, and after stirring evenly, stand still for 2 hours to separate layers. The wastewater located in the lower layer of the extraction tower enters the Fenton pool, and the complexed extractant in the upper layer enters the extraction agent regeneration device for reuse;

[0038] 3) Fenton oxidation: Wastewater enters the Fenton pool for Fenton oxidation, the pH value ...

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Abstract

The invention discloses a treatment process of waste water polluted by the pesticide of Dursban, and the process includes the procedures of acid eduction, complexation and extraction, Fenton oxidation and catalytic oxidation. The invention is characterized in that Dursban waste water and herbicide Pendimethalin waste water are comprehensively treated, thereby achieving the proposal of waste controlled by the waste, decreasing the load of organic pollutant being hard to be graded in the waste water, improving the biological degradability of the waste water, removing the pollutant from the waste water, and increasing the biochemical performance of the waste water. Besides, the invention has the advantages of safe and advanced technique, clean operation and low waste water treatment cost.

Description

technical field [0001] The invention relates to a pesticide wastewater treatment process, in particular to a chlorpyrifos wastewater treatment process, and belongs to the field of environmental protection. Background technique [0002] Chlorpyrifos (chlorpyrifos) is a high-efficiency, broad-spectrum, low-residue organophosphorus pesticide. It is one of the pesticide varieties with the largest output in the world. It is widely used in European and American countries. It is also an excellent variety for my country to replace the highly toxic pesticide methamidophos ,Market prospects. However, there is no mature and effective industrialized treatment method for the wastewater produced in the production process of chlorpyrifos at home and abroad. This wastewater contains heavy metal copper, CN-R, sulfide, organophosphorus and nitrogen-containing heterocycles and other toxic and harmful pollutants. The B / C ratio is about 0.10. The wastewater has high pollutant concentration, high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/66C02F1/26C02F1/72C02F1/78
Inventor 宋东升齐慧芹孙绪兵宫振姚继磊程翠花李勇刚
Owner 山东华阳农药化工集团有限公司
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