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Pretreatment method for industrial wastewater of pyrethroid

A technology for pyrethroid and wastewater production, which is applied in water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., and can solve the problem of poor pretreatment effect and poor biodegradability of pyrethroid wastewater and other problems, to achieve stable and effective water treatment effect, ensure water treatment effect, and the effect of strong applicability

Inactive Publication Date: 2014-04-02
NANJING AGRICULTURAL UNIVERSITY
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Problems solved by technology

[0009] The purpose of the present invention is to provide a pretreatment method for pyrethroid production wastewater, which solves the problems of poor biodegradability of pyrethroid wastewater and poor pretreatment effect of existing physical and chemical methods in the prior art.

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  • Pretreatment method for industrial wastewater of pyrethroid
  • Pretreatment method for industrial wastewater of pyrethroid
  • Pretreatment method for industrial wastewater of pyrethroid

Examples

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Embodiment 1

[0033] Example 1 The application of water treatment in a pesticide factory by the pretreatment method of pyrethroid production wastewater.

[0034] The pyrethroid production wastewater discharged from the production line of a pesticide factory, the mixed wastewater is dark yellow as a whole and has a certain pungent smell. After analysis, the pollutants in the wastewater mainly include chloramphenicol, triethylamine, toluene, and Alkanes, methanol, benzene, thionyl chloride, chloroform, tetrahydrofuran, carbon tetrachloride, tert-butanol, CN - , SO 4 2- , Cl - etc., it has the following characteristics: the overall waste water is dark yellow, has a strong pungent odor and a certain amount of suspended solids, and the concentration of pollutants is high (COD Cr Between 18000-20000mg / L), it is difficult to biodegrade and naturally degrade, and the wastewater contains a certain amount of oil. It can be seen that the composition of the wastewater is very complex, containing ma...

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Abstract

The invention discloses a pretreatment method for industrial wastewater of pyrethroid. The pretreatment method is characterized by comprising the following steps of: (1) carrying out first-grade treatment by a ferric-carbon microelectrolysis technology to remove a part of pollutant in industrial wastewater; (2) carrying out second-grade oxydative degradation treatment on the micro-electrolyzed industrial wastewater by a diamond electro-catalysis technology; and (3) carrying out third-grade treatment on the wastewater which is electrically catalyzed by diamond by the ferric-carbon microelectrolysis technology. The method is very good in treatment effect of various pesticide wastewaters, and can meet the water inflowing requirement of the existing biochemical wastewater treatment (COD (chemical oxygen demand) is less than 1000mg / L).

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater pretreatment, and in particular relates to a pretreatment method for pyrethroid production wastewater, so that the effluent can meet the water quality requirements of conventional biochemical pools. Background technique [0002] As an important means of agricultural production to ensure high crop yields, pesticides have always been the focus of the development of the chemical industry. At present, there are more than 1,000 pesticide production enterprises in my country, including more than 400 original medicines. The production capacity of original medicines is nearly 700,000 tons, and the annual output is nearly 300,000 tons, ranking second in the world. However, there is still a large gap between the overall level of my country's pesticide industry and the developed countries in the world, mainly in the unreasonable product structure, many old varieties, few high value-added and ul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06C02F1/461
Inventor 张春永
Owner NANJING AGRICULTURAL UNIVERSITY
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