Diquat wastewater treatment method

A technology for wastewater treatment and diquat, which is used in extraction water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. It can solve the problem of large fluctuations in effluent quality, high-concentration wastewater discharge, and trouble for producers. and other problems, to achieve effective and efficient treatment methods, save production costs, and reduce pressure.

Inactive Publication Date: 2019-11-05
安徽红太阳新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology helps manage harmful chemicals from industrial wastes by extracting them out with an organic solvent that breaks down certain compounds into simpler forms like bipyltin or pyrimidone. These smaller molecules are then removed through filtration techniques before being returned to industry again after processing it up. By doing this process, we aim to make sure they don't affect our environment too much when released over time.

Problems solved by technology

This patented technical problem addressed in that patents relates to improving the removal of unwanted plants from crops during cultivation without causing environmental damage or generating excessively high costs associated therewith.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for treating diquat wastewater, comprising the following steps:

[0026] (1) Pour 1600L of waste water into the reactor and adjust the pH value to 10;

[0027] (2) Add 800L of extractant;

[0028] (3) start stirring, and the reaction time is 60 minutes;

[0029] (4) stop reaction, oil and water are separated;

[0030] (5) the separated extractant continues to repeat the extraction 4 times to saturation;

[0031] (6) Mix the saturated extractant with dilute sulfuric acid at a ratio of 1 to 1 by volume, stop layering after stirring the reaction, separate the oil phase and continue to use it as the extractant, and the acid solution contains a large amount of bipyridyl, which can be used again Production.

Embodiment 2

[0033] A method for treating diquat wastewater, comprising the following steps:

[0034] (1) Pour 1600L of waste water into the reactor and adjust the pH value to 10.5;

[0035] (2) Add 800L of extractant;

[0036] (3) start stirring, and the reaction time is 55 minutes;

[0037] (4) stop reaction, oil and water are separated;

[0038] (5) the separated extractant continues to repeat the extraction 5 times to saturation;

[0039] (6) Mix the saturated extractant with dilute hydrochloric acid at a ratio of 1 to 1 by volume, stop layering after stirring the reaction, separate the oil phase and continue to use it as the extractant, and the acid solution contains a large amount of bipyridine, which can be used again Production.

Embodiment 3

[0041] As a comparative example, 1600L of waste water was treated with powdered activated carbon by traditional method, and the dosing ratio was 2 / 1000.

[0042] By comparing the average effect of embodiments 1 and 2 with embodiment 3, as shown in table 1:

[0043] Table 1 Comparison of the effects of the two methods

[0044] Influent concentration (mg / L) Effluent concentration (mg / L) Removal rate Activated carbon treatment 1335 170.38 87.24％ Extraction treatment 1335 54.89 95.89％

[0045] Cost comparison of the two methods:

[0046] Activated carbon treatment, the dosing ratio is 2 / 1000, that is, the dosage of 1 ton of wastewater is 2KG, and the amount of wastewater treated in a year is about 15,000 tons, that is, the consumption of activated carbon is about 30 tons, and the purchase cost is 270,000 yuan. Hazardous waste treatment The cost is 240,000 yuan, and the total is 510,000 yuan.

[0047] Extraction treatment, after the extractant ...

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PUM

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Abstract

The invention discloses a diquat wastewater treatment method. The diquat wastewater treatment method comprises the following steps: (1) feeding diquat wastewater into a reaction kettle to adjust the pH value to 9.5-10.5; (2) adding an extractant into the reaction kettle; (3) starting stirring in the reaction kettle, and performing a reaction for 50-70 min; (4) stopping the stirring after the reaction is finished, and carrying out oil-water separation on the obtained product; and (5) continuously reusing the separated extractant until saturation. The method adopting an extraction process to treat the diquat wastewater is simple and easy, can avoid activated carbon from being used, and controls the concentration of 2,2-bipyridyl in effluent water at a low value, so the pressure of biochemical treatment in three-waste workshops is greatly reduced; and the extracted 2,2-bipyridyl can also be back-extracted, and is used for front-end reproduction to realize recycling, so the efficiency is improved, the production cost is saved greatly, and the method is a practical and efficient treatment method.

Description

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Claims

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Application Information

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Owner 安徽红太阳新材料有限公司
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