Method for processing 3,5,6-trichloropyridine-2-sodium alcohol wastewater

A sodium alkoxide waste water and treatment method technology, applied in natural water body treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., to increase the gas-liquid contact area, save costs, and reduce emissions

Active Publication Date: 2014-07-16
JIANGSU JIUJIUJIU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Iron-carbon micro-electrolysis technology is a good process for treating wastewater by using the principle of metal corrosion to form a primary battery. It has the advantages of treating waste with waste, good treatment effect and easy operation. It is widely used in industrial wastewater such as printing and dyeing, electroplating, pharmaceuticals, and coking. However, it has not been reported that it is used in the treatment of triclopyridin sodium wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Use 2000g of soy sauce-like sodium clopyridinate wastewater (COD 42000, ammonia nitrogen 2230, copper ion content 895ppm, salt content 14%) to adjust the pH to 0.1~3 with the acidic tail gas generated during the addition and cyclization process (ex. 2, 3). Add water to the iron-carbon micro-electrolyzer, and electrolyze with micro-nano aeration (oxygen) for 4 hours. Add 60 g of 35% hydrogen peroxide and 15 g of activated carbon to the effluent and stir for 4 hours. Add solid sodium hydroxide to adjust the pH to 9, filter off waste carbon and iron sludge to obtain a colorless transparent liquid (COD 3900, ammonia nitrogen 37, copper ions 1.1 ppm, salt 14.8%). 1602.3g of water was distilled to obtain 287.1g of white tidal salt and 58.9g of slightly yellow mother liquor. The mother liquor is added to the next batch of 2000g waste water for treatment.

Embodiment 2

[0022] The 58.9 g mother liquor obtained in Example 1 was added to 2000 g of sodium triclopyridinate waste water, and all the other treatments were the same as in Example 1 to obtain 300.9 g of white tidal salt and 60.3 g of light yellow mother liquor.

Embodiment 3

[0024] The aeration gas was changed to air, and the rest of the treatment was the same as in Example 1. Before distillation, a light yellow transparent liquid was obtained, with COD 4860, ammonia nitrogen 67, copper ion 3.1 ppm, and salt content 14.5%. After distillation, 292.2 g of white tidal salt and 55.5 g of light yellow mother liquor were obtained.

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PUM

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Abstract

The invention discloses a method for processing 3,5,6-trichloropyridine-2-sodium alcohol wastewater. The method orderly comprises the following steps: adjusting the pH value of wastewater to 2-5 by using an acid tail gas generated in the sodium alcohol production process; feeding the wastewater into a microelectrolysis cell; carrying out micro-nano aeration for 2-4 hours; adding 35% of hydrogen peroxide to electrolysis effluent to oxidize for 2-4 hours; adding activated carbon in the treatment process; adding solid sodium hydroxide to adjust the pH to 7-9; removing activated carbon and sludge, and steaming out water which is 80-85% of mass of the wastewater to obtain an industrial salt; adding mother liquor to the next batch of wastewater; and processing again. A micro-nano bubble technology is creatively combined with an iron-carbon micro electrolysis technology to carry out aeration microelectrolysis, and is combined with a fenton oxidation-flocculating settling-distillation process, so that not only is the sodium alcohol wastewater effectively processed, but also the problem of tail gas emission in the sodium alcohol production process is solved, and meanwhile, the by-product industrial salt is economical and environment-friendly, and safe and reliable.

Description

technical field [0001] The invention relates to a treatment method for 3,5,6-trichloropyridin-2-alcohol sodium waste water, which belongs to the technical field of environmental protection. Background technique [0002] 3,5,6-trichloropyridin-2-alcohol sodium wastewater is an industrial wastewater with high salt, high ammonia nitrogen, high COD, and high heavy metal properties, and is the most difficult type of wastewater to treat. The wastewater is in the form of soy sauce, pH>12, COD 30000-80000, ammonia nitrogen 1800-12000, divalent copper ion content 1000ppm, salt content 8-20%, biochemical absolutely cannot adapt. The treatment of this wastewater has always been a headache for triclopyridin sodium manufacturers. [0003] In recent years, many colleagues have conducted research on this wastewater. The common method is to distill and concentrate the salt, and then dilute the mother liquor for biochemistry. This method alleviates the problem of microbial intolerance to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F103/36
Inventor 周新基朱建军李珣珣王丽丽钱海霞咸娟于敏葛大伟康登海
Owner JIANGSU JIUJIUJIU TECH
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