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Integrated prochloraz production wastewater treatment method

A technology for production wastewater and comprehensive treatment, applied in biological water/sewage treatment, multi-stage water treatment, water/sewage treatment, etc., can solve the problems of reducing the effect of advanced oxidative degradation, poor treatment effect and high treatment cost

Active Publication Date: 2018-11-27
绍兴齐英膜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the salinity of wastewater has a strong inhibitory effect on advanced oxidation, which will greatly reduce the degradation effect of advanced oxidation; the coagulation sedimentation method is not effective for the treatment of wastewater with high COD concentration; Higher; while the salt produced by direct evaporation + biochemical method is hazardous waste, which cannot realize the recycling of salt and waste resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The comprehensive treatment method of prochloraz production wastewater comprises the following steps:

[0045] (1) adopt mass concentration to be that the hydrochloric acid of 3% adjusts the pH of amination section waste water to 2, the phenolic organic matter such as trichlorophenol separates out, filters to obtain filtrate I, and the COD of filtrate I is 41251mg / L, and filter residue can be returned as raw material Used in the production of prochloraz;

[0046] Taking the quality of triethylamine waste water as a benchmark, add 3% caustic soda in the triethylamine waste water, triethylamine is layered, and the triethylamine of the upper layer is separated as a raw material and reused to the production of prochloraz, and the TOC of the lower floor waste water is 42252mg / L (COD detection error is bigger), lower layer waste water mixes with filtrate I, ether chemical section waste water and condensation workshop waste water, adjusts the pH of mixed solution to 5, and the...

Embodiment 2

[0055] The comprehensive treatment method of prochloraz production wastewater comprises the following steps:

[0056] (1) with embodiment 1;

[0057] (2) the mixed solution that step (1) is obtained is divided into two shares of A and B, and A share accounts for 90% of the mixed solution total amount, and B share accounts for 10% of the mixed solution total amount, in terms of the total mass of the mixed solution, Add 0.1% ferrous chloride to the A-stock mixed solution, add 10% hydrogen peroxide (in hydrogen peroxide, H 2 o 2 The mass concentration is 27.5%);

[0058] Add the mixed liquid of stock A into the closed reactor, raise the temperature to 120°C, then slowly pump the mixed liquid of stock B into the closed reactor within 30 minutes, and continue to stir and react for 2.5 hours;

[0059] After the reaction, the COD of the reaction solution was 8950mg / L, the COD removal rate was 50.82%, and the TN was 5700mg / L;

[0060] (3) The pH of the reaction solution is adjuste...

Embodiment 3

[0065] Compared with Example 1, the difference is: in the step (2), based on the total mass of the mixed solution, 15% hydrogen peroxide (in hydrogen peroxide, H 2 o 2 The mass concentration is 27.5%); after the reaction, the COD=7468mg / L of the reaction solution, the COD removal rate is 58.96%, TN=5514mg / L. Others are the same as embodiment 1.

[0066] After electrodialysis and evaporation, the evaporated condensed water is mixed with fresh water, COD=5745mg / L, B / C=0.35, and discharged after biochemical treatment reaches the standard.

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PUM

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Abstract

The invention discloses an integrated prochloraz production wastewater treatment method. The integrated prochloraz production wastewater treatment method comprises the following steps of adjusting amination section wastewater to be acid to obtain a filter liquor I; adding sodium hydroxide into triethylamine wastewater to separate out triethylamine and to obtain triethylamine residue wastewater; mixing the filter liquor I, the triethylamine residue wastewater, etherification section wastewater and condensation section wastewater, and adjusting the liquid mixture to be acid; adding soluble ferrous salts and hydrogen peroxide into the liquid mixture for oxidizing reaction at 110-130 DEG C; regulating the pH of the oxidized liquid to 8-9, then filtering the liquid to obtain a filter liquor II,regulating the pH of the filter liquor II to 9-11, then uniformly mixing in phosphate and then soluble magnesium salts for precipitation, and performing filtering to obtain a filter liquor III; regulating the pH of the filter liquor III to 6-9, performing electrolysis; evaporating electrolyzed concentrated liquid to recycle inorganic salts; mixing electrolyzed plain water with evaporated distilled water for biochemical treatment. The integrated prochloraz production wastewater treatment method can achieve integrated resource treatment on wastewater from every working section of prochloraz production.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a comprehensive treatment method for prochloraz production wastewater. Background technique [0002] The chemical name of prochloraz is N-propyl-N-[2-(2,4,6-trichlorophenoxy)ethyl-1H-imidazole-1-carboxamide, which is a broad-spectrum fungicide. It has obvious control effects on diseases caused by Ascomycetes and Deuteromycetes in various crops, and can also be mixed with most fungicides, insecticides, and herbicides, all of which have good control effects. It can treat and eradicate various diseases on field crops, fruits and vegetables, turf and ornamental plants. It was popularized and used in my country at the end of the 20th century. It has been widely used in the production, storage and transportation of agricultural and forestry products such as grain, vegetables, fruits and flowers. It has remarkable control effect and is a widely used fungicide in recent years. Since...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F9/14C02F103/36
CPCC02F1/001C02F1/04C02F1/4693C02F1/5236C02F1/66C02F1/722C02F3/00C02F9/00C02F2103/36C02F2301/08
Inventor 陶旭东贾军芳
Owner 绍兴齐英膜科技有限公司
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