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Treatment method of acrylic acid wastewater

A treatment method, acrylic acid technology, applied in water/sewage treatment, water treatment parameter control, neutralized water/sewage treatment, etc., can solve the problems of microbial damage, poisoning, affecting biological treatment effect, etc. Implementation, good social and economic benefits

Pending Publication Date: 2021-09-24
SINOPEC NANJING RES INST OF CHEM IND CO LTD +2
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  • Abstract
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Problems solved by technology

High-concentration aldehyde-containing acrylic acid wastewater will harm or cause poisoning to microorganisms, thereby affecting the biological treatment effect, so the biochemical method with low operating costs can only treat low-concentration aldehyde-containing wastewater

Method used

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  • Treatment method of acrylic acid wastewater
  • Treatment method of acrylic acid wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Waste water raw water test results:

[0020] serial number analysis content detection value 1 Acrylic acid content 10.69% 2 Total aldehydes (calculated as formaldehyde) 1.89% 3 COD 210000mg / L

[0021] Take 331.7g of raw water, add NaOH (about 7wt%) to adjust the pH to 8~9, take 390g of this water, add 1.95g Ca(OH) 2 (0.5wt%), heated to reflux at 90°C for 1.5 hours. The treated water is distilled and the distilled water phase corresponding to 70% of its mass is collected and analyzed. The distilled water phase does not contain aldehyde, COD1280mg / L, BOD460 mg / L, B / C is 0.36, and can be directly biochemical.

Embodiment 2-5

[0023] Take about 330g of wastewater under the same conditions, and only add NaOH. During the distillation test, the extraction was continued until obvious solids appeared on the wall of the flask and stopped.

[0024]

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PUM

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Abstract

The invention discloses a treatment method of acrylic acid wastewater. A certain amount of alkali is added into the high-concentration aldehyde-containing acrylic acid wastewater, fractions are collected in a distillation mode and can enter a wastewater device for biochemical treatment, and distillation still liquid is incinerated. The method is simple and easy to implement, the COD removal rate is high, acrylic acid and aldehyde substances with biotoxicity can be removed, the treatment cost of the wastewater can be greatly reduced, and the method has important social benefits and economic benefits.

Description

technical field [0001] The present invention relates to the field of waste water, and introduces a treatment method for acrylic acid waste water. Specifically, a certain amount of alkali is added to high-concentration aldehyde-containing acrylic acid waste water, and the collected fractions can enter waste water equipment for biochemical treatment through distillation. liquid incineration. Background technique [0002] Acrylic acid wastewater contains high concentration of formaldehyde and formaldehyde, acetaldehyde, acrolein, furfural, benzaldehyde and other aldehydes. The presence of high concentration of aldehydes makes the treatment of acrylic acid wastewater more difficult. High-concentration aldehyde-containing acrylic acid wastewater will harm or cause poisoning to microorganisms, thereby affecting the biological treatment effect, so the biochemical method with low operating costs can only treat low-concentration aldehyde-containing wastewater. In order to meet the n...

Claims

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Application Information

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IPC IPC(8): C02F9/10F23G7/00C02F101/34
CPCC02F1/048C02F1/043C02F1/66F23G7/008C02F2209/08C02F2101/34C02F2209/06
Inventor 任磊黄伟杨忠林
Owner SINOPEC NANJING RES INST OF CHEM IND CO LTD
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