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Process for effectively treating organophosphorus pesticide wastewater

A technology for pesticide wastewater and wastewater, which is applied in water/sewage treatment, multi-stage water/sewage treatment, oxidized water/sewage treatment, etc. It can solve the problems of complex treatment process, refractory degradation, and poor biodegradability, etc., and achieves simple pharmaceutical methods , Biodegradability improvement, toxicity reduction effect

Inactive Publication Date: 2010-09-22
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while it promotes agricultural production, the wastewater generated in the production process has caused serious harm, and there is no mature and effective industrialized treatment method at home and abroad.
[0003] This type of wastewater has high organic content, heavy metal ions, poor biodegradability, high toxicity, and organic phosphorus in the wastewater has an inhibitory effect on microorganisms. It is a high-concentration, refractory pesticide wastewater
Therefore, the content of organic phosphorus in the pesticide wastewater treated by the commonly used biochemical method is still high, and its treatment process is complicated, the cycle is long, the cost is high, and the effect is poor. Sometimes improper treatment will cause secondary pollution.
At present, there are also some domestic and foreign incineration methods used to treat organophosphorus pesticide wastewater, but this method has high cost, high energy consumption, and is prone to produce secondary pollutants, such as waste residue and waste gas, which cause environmental hazards.

Method used

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  • Process for effectively treating organophosphorus pesticide wastewater
  • Process for effectively treating organophosphorus pesticide wastewater
  • Process for effectively treating organophosphorus pesticide wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The dichlorvos pesticide technical product produced by a pesticide factory was used to prepare a 100mg / L dichlorvos pesticide solution as the wastewater to be treated. Utilize process of the present invention to process dichlorvos pesticide wastewater, concrete steps are as follows:

[0022] Dosing potassium permanganate concentration of 30mg / L in the mixed contact reaction chamber of potassium permanganate and ozone, the unique red color of potassium permanganate disappears after 15 minutes; the ozone tail gas of the subsequent ozone / ultraviolet light joint treatment reaction chamber is introduced Potassium permanganate and ozone are mixed in contact with the reaction chamber; ozone gas is continuously filled into the reaction chamber for combined ozone / ultraviolet light treatment, the hydraulic retention time is 30 minutes, and the ozone concentration in the solution phase is maintained at 5-8 mg / L.

[0023] The design parameters of the reaction chamber for combined o...

Embodiment 2

[0028] The dichlorvos pesticide technical product produced by a pesticide factory was used to prepare a 200mg / L dichlorvos pesticide solution as the wastewater to be treated. Utilize process of the present invention to process dichlorvos pesticide wastewater, concrete steps are as follows:

[0029] Dosing potassium permanganate concentration of 50mg / L in the mixed contact reaction chamber of potassium permanganate and ozone, the unique red color of potassium permanganate disappears after 20 minutes; the ozone tail gas of the subsequent ozone / ultraviolet light joint treatment reaction chamber is introduced Potassium permanganate and ozone are mixed in contact with the reaction chamber; ozone gas is continuously filled into the reaction chamber for combined ozone / ultraviolet light treatment, the hydraulic retention time is 30 minutes, and the ozone concentration in the solution phase is maintained at 5-8 mg / L.

[0030] The design parameters of the reaction chamber for combined o...

Embodiment 3

[0036] Using the dimethoate pesticide technical product produced by a pesticide factory, it is configured into a 200mg / L dimethoate pesticide solution as the wastewater to be treated. Utilize process of the present invention to process dimethoate pesticide wastewater, concrete steps are as follows:

[0037] Dosing potassium permanganate concentration of 50mg / L in the mixed contact reaction chamber of potassium permanganate and ozone, the unique red color of potassium permanganate disappears after 30 minutes; the ozone tail gas of the subsequent ozone / ultraviolet light joint treatment reaction chamber is introduced Potassium permanganate and ozone are mixed in contact with the reaction chamber; ozone gas is continuously filled into the reaction chamber for combined ozone / ultraviolet light treatment, the hydraulic retention time is 30 minutes, and the ozone concentration in the solution phase is maintained at 5-8 mg / L.

[0038] The design parameters of the reaction chamber for c...

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PUM

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Abstract

The invention relates to a process for effectively treating organophosphorus pesticide wastewater, which comprises a potassium permanganate and ozone mixing and contacting reaction cavity and an ozone / ultraviolet joint treatment reaction cavity. When the organophosphorus pesticide wastewater flows through the potassium permanganate and ozone mixing and contacting reaction cavity, off-gas ozone in the subsequent treatment process is introduced into the pesticide wastewater and can be combined with potassium permanganate to pretreat the pesticide wastewater. The pretreated wastewater is lifted by a water pump and then is jetted into the ozone / ultraviolet joint treatment reaction cavity from an inclined upper position by forming a 15-degree angle with the horizontal plane. In the ozone / ultraviolet joint treatment reaction cavity, the ozone can generate strong-oxidability hydroxyl free radicals under the radiation of ultraviolet to quickly oxidize organophosphorus pesticide in the pesticide wastewater. In addition, the ozone and the ultraviolet can also degrade the organophosphorus pesticide. The process can also be applied to treating other persistent organic pollutant wastewater.

Description

technical field [0001] The invention relates to an organophosphorus pesticide wastewater treatment process, which belongs to the technical field of environmental protection wastewater treatment. Background technique [0002] In recent years, my country's pesticide industry has developed rapidly, with an annual production capacity of more than 1 million tons, and its total output ranks first in the world. Through the prevention and control of pesticides, 54 million tons of grain losses have been recovered every year across the country. As a substitute for organochlorine pesticides, organophosphorus pesticides are widely used at home and abroad because of their high efficiency, broad spectrum and low residue, and they are currently the most widely used pesticides. However, while it promotes agricultural production, the wastewater produced in the production process has caused serious harm, and there is no mature and effective industrialized treatment method at home and abroad....

Claims

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Application Information

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IPC IPC(8): C02F9/08C02F1/78C02F1/32C02F1/72C02F1/58C02F101/30
Inventor 强志民刘超史彦伟张涛田芳
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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