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Method for treating chlorphrifos production wastewater by ozone oxidation

A technology for producing waste water and ozone oxidation, which is applied in the direction of oxidized water/sewage treatment, chemical instruments and methods, and filtration treatment. It can solve the problems of waste gas and waste residue, high microbial toxicity, and high treatment costs, and achieve saving production costs and total phosphorus. The effect of content reduction and high processing capacity

Active Publication Date: 2016-12-07
湖北犇星农化有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the large amount of wastewater in the three-effect evaporation method, although the treated water quality meets the national discharge standards, the energy consumption is high, waste gas and residue are generated, secondary pollution is generated, and the treatment cost is high.
Although the biochemical treatment method has low energy consumption and no secondary pollution, it is very toxic to microorganisms and difficult to treat for high-concentration chlorpyrifos wastewater

Method used

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  • Method for treating chlorphrifos production wastewater by ozone oxidation
  • Method for treating chlorphrifos production wastewater by ozone oxidation
  • Method for treating chlorphrifos production wastewater by ozone oxidation

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Embodiment 1

[0035] A method for treating chlorpyrifos production wastewater by ozone oxidation is used to treat the wastewater generated in a certain chlorpyrifos production process.

[0036] The method includes the following steps:

[0037] (1), get 500g chlorpyrifos production waste water in the 2000ml beaker, add hydrochloric acid, adjust pH to be 2;

[0038] (2), the above-mentioned wastewater is suction-filtered with a sand core funnel to obtain the filtrate, and the filter cake is recycled and reused;

[0039] (3), neutralize the above-mentioned filtrate with unslaked lime, obtain clear liquid after neutralization and be used for next procedure;

[0040] (4) A packing device made of fluoroplastic is selected as the reaction device (0.5 meters in diameter). Under laboratory conditions, ceramics are used as the carrier, manganese oxide and cobalt oxide are used as catalysts, and the mass ratio of manganese oxide and cobalt oxide is 3 : 1, the waste water after step (3) is processed ...

Embodiment 2

[0047] A method for treating chlorpyrifos production wastewater by ozone oxidation is used to treat the wastewater generated in a certain chlorpyrifos production process.

[0048] The method includes the following steps:

[0049] (1), get 500g chlorpyrifos production waste water in 2000ml beaker, add the acid waste water in the production process of isooctyl thioglycolate, adjust pH to be 2;

[0050] (2), above-mentioned waste water is filtered with sand core funnel, obtains filtrate, and filter cake recycles;

[0051] (3), neutralize the above-mentioned filtrate with unslaked lime, obtain clear liquid after neutralization and be used for next procedure;

[0052](4), choose fluoroplastic material as reaction device, adopt ceramics as carrier, manganese oxide and cobalt oxide as filler, the mass ratio of manganese oxide and cobalt oxide is 3:1, transfer the waste water from above (3) into the gas-liquid reactor In the process, ozone was introduced for 2h, the ozone concentrat...

Embodiment 3

[0059] A method for treating chlorpyrifos production wastewater by ozone oxidation is used to treat the wastewater generated in a certain chlorpyrifos production process.

[0060] The method includes the following steps:

[0061] (1), get 500g chlorpyrifos production waste water in the 2000ml beaker, add sulfuric acid, adjust pH to be 2;

[0062] (2), above-mentioned waste water is filtered with sand core funnel, obtains filtrate, and filter cake recycles;

[0063] (3), neutralize the above-mentioned filtrate with unslaked lime, obtain clear liquid after neutralization and be used for next procedure;

[0064] (4), select the filler device of fluoroplastic material as reaction device, adopt pottery to do carrier, manganese oxide, cobalt oxide do filler, the mass ratio of manganese oxide and cobalt oxide is 3:1, and above-mentioned (3) waste water is transferred to In the gas-liquid reactor, ozone was introduced for 1 hour, the ozone concentration was 100 mg / l, and the flow ra...

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Abstract

The invention provides a method for treating chlorphrifos production wastewater by ozone oxidation. The method includes the steps of: (1) acidification pretreatment: utilizing one or more of acid wastewater, hydrochloric acid and sulfuric acid to regulate the pH of chlorphrifos production wastewater to 2-3; (2) settlement separation: producing a lot of precipitates by the chlorphrifos production wastewater subjected to acidification pretreatment, and removing the precipitates in the wastewater prior to recycling by means of filtering or standing; (3) neutralization with quicklime; (4) catalytic ozonation: feeding neutralized clear liquid into a gas-liquid reactor containing filler, and feeding in ozone for 20min-150min; (5) adsorbent treatment; (6) decoloration. By the method, the problem that the chlorphrifos production wastewater treated and exposed to the sun becomes red in color, has pungent smell and the like is solved effectively. After adoption of the catalytic ozonation process, organic matters difficult to degrade in the wastewater are oxidized and decomposed, COD (chemical oxygen demand) is lowered obviously, removal rate reaches 92%, and total phosphorus content is lowered.

Description

technical field [0001] The invention belongs to the field of wastewater purification, and in particular relates to a method for purifying wastewater by adopting a catalytic oxidation method. Background technique [0002] The 13th Five-Year Plan reforms the basic system of environmental governance, establishes an enterprise emission permit system covering all fixed pollution sources, and establishes a sound environmental monitoring system. Chlorpyrifos has the characteristics of broad spectrum, high efficiency, low residue and low toxicity, and has good contact killing, fumigation and stomach poisoning effects on pests. Most of the current industrial production methods are aqueous phase methods, which generate a large amount of industrial wastewater. The main components of the wastewater are: sodium chloride, tetrachloropyridine, sodium 3,5,6-trichloropyridinate, surfactants, chlorpyrifos, ethyl chloride and its derivatives, etc. It is characterized by high salt content, re...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/78
CPCY02W10/37C02F9/00C02F1/00C02F1/001C02F1/28C02F1/281C02F1/283C02F1/66C02F1/725C02F1/78C02F2001/007
Inventor 戴百雄熊传宗贺丛国刘兵罗斌
Owner 湖北犇星农化有限责任公司