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A kind of treatment method of carbendazim wastewater

A treatment method, carbendazim technology, applied in the field of carbendazim wastewater treatment, can solve the problems of cumbersome process, large equipment investment, and large investment cost, and achieve the effect of simple process, low operating cost, and low equipment investment

Active Publication Date: 2020-08-07
ZHEJIANG XINAN CHEM INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method does not remove calcium, and a large amount of solid waste will be generated during wet oxidation, which will easily cause equipment blockage; at the same time, waste liquid will be generated after resin desorption, which is difficult to carry out subsequent treatment; A large number of solids need to be processed; in addition, the operating conditions of resin adsorption and bipolar membrane electrodialysis are strict, the production operation is difficult, the process is cumbersome, and the investment in equipment is large
[0008] To sum up, there are certain problems in the existing carbendazim wastewater treatment technology, or the treatment is not thorough, and the salt in the wastewater is not treated; or the treatment process produces secondary pollution, and no treatment is proposed for the secondary pollution method; or the treatment process is cumbersome, requires a lot of equipment, and the investment cost is large
[0009] With the implementation of the new national environmental protection law, higher requirements are put forward for the discharge of wastewater and the treatment of solid waste. However, the traditional carbendazim wastewater treatment process can no longer meet the new needs. Therefore, how to treat carbendazim thoroughly and economically Wastewater has become a technical problem to be solved urgently by those skilled in the art

Method used

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  • A kind of treatment method of carbendazim wastewater
  • A kind of treatment method of carbendazim wastewater
  • A kind of treatment method of carbendazim wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Take 1000g of carbendazim wastewater and perform high-temperature oxidation. The temperature of high-temperature oxidation is 600° C. for 1 hour to obtain 106 g of calcium chloride product with a content of 97%, and the color of the product is gray.

[0081] The performance indexes of the anhydrous calcium chloride product obtained in Example 1 of the present invention are shown in Table 3.

Embodiment 2

[0083] (1) Take 1000g of carbendazim wastewater, add 27g of calcium oxide, adjust the pH to 12, heat to 60°C, and then blow air into the bubbling, the bubbling air flow rate is 1000mL / min, and the bubbling time is 60min The ammonia gas in the carbendazim wastewater is obtained to obtain deammoniated wastewater; the tail gas produced is absorbed by dilute hydrochloric acid to obtain ammonium chloride as a by-product.

[0084] (2) carry out ion analysis to the waste water after the deamination that step (1) obtains, according to the analysis data of calcium ion and chloride ion, supplement hydrochloric acid or calcium oxide, the mol ratio of calcium ion and chloride ion is adjusted to 1:2, Then concentrate, the concentration rate is 3 times, respectively to obtain fraction 692g and concentrated solution 335g; wherein, the pH value of the fraction is 6.0~6.5, the color is colorless and transparent, and the main components of the fraction are shown in Table 2;

[0085] The main co...

Embodiment 3

[0091] Take 1000g of carbendazim wastewater and perform high-temperature oxidation. The temperature of high-temperature oxidation is 800° C. for 1 hour to obtain 106 g of calcium chloride product with a content of 96%, and the color of the product is white.

[0092] The performance indexes of the anhydrous calcium chloride product obtained in Example 3 of the present invention are shown in Table 3.

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Abstract

The invention provides a treatment method of carbendazol waste water. The method comprises the following steps: a, performing high-temperature oxidation on the carbendazol waste water, so as to obtaina calcium chloride product; and ensuring that the temperature for high-temperature oxidation is 400 to 1000 DEG C, and the time is 0.1 to 10 h. Compared with the prior art, the method realizes oriented conversion of the carbendazol waste water through high-temperature oxidation under a specific condition, thereby thoroughly treating various pollutants in the carbendazol waste water, including converting calcium and chlorine in the carbendazol waste water into the calcium chloride product, thoroughly converting organics in the carbendazol waste water into carbon dioxide gas and water vapor, and converting ammonia in the carbendazol waste water into products, such as ammonium hydroxide, ammonium chloride or ammonium sulfate, and does not cause secondary pollution; and in addition, the method is simple in technology, realizes high resource cyclic utilization of the carbendazol waste water, and is economical and efficient.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, and more specifically, relates to a method for treating carbendazim wastewater. Background technique [0002] Carbendazim, the chemical name is N-(2-benzimidazolyl)-methyl carbamate, also known as cotton wilted, benzimidazole No. 44, befenti BCM, etc. Carbendazim is widely used and is mainly used as a plant fungicide. It is a broad-spectrum, high-efficiency and low-toxic fungicide. It is mainly used for vegetable anthracnose, melon powdery mildew, common diseases of apples, citrus, pears and fruits It can also be used as an industrial fungicide, such as anti-mildew and anti-corrosion in papermaking, textile, leather and other industries. [0003] The industrial production of carbendazim is mainly based on the calcium cyanamide method (methyl chloroformate method), with methanol, phosgene, and lime nitrogen (calcium cyanamide) as raw materials to first synthesize the methyl cyanamide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/02C02F9/10C01F11/30C02F103/36
CPCC01F11/30C02F1/02C02F1/04C02F1/20C02F1/66C02F9/00C02F2103/36
Inventor 周曙光秦龙祝小红黄鑫徐亚卿刘一驰
Owner ZHEJIANG XINAN CHEM INDAL GROUP
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