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Enzyme treatment technique of difficult degradation organic sewage

A technology of organic wastewater and enzyme treatment

Inactive Publication Date: 2009-09-23
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, these improved methods do not break through the limitations of traditional enzyme treatment, they can only deal with phenols, aromatic amines and azo dyes, and it is difficult to remove other persistent refractory organic pollutants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The technology of the invention treats the wastewater containing phenol.

[0013] Add 100mL of 100mg / L phenol waste water into a 250mL Erlenmeyer flask, adjust the pH to 3 by adding hydrochloric acid under the condition of magnetic stirring, and adjust the temperature to 30°C through the temperature control device, ventilate the air until the dissolved oxygen is 5mg / L, and then The content of horseradish peroxidase (HRP) was added at 0.1 U / mL, the reduced cocatalyst coenzyme NADH at 0.1 mmol / L, and the reaction time was 10 min.

[0014] After treatment, the removal rate of phenol is greater than 98%, and the removal rate of COD is greater than 90%.

Embodiment 2

[0016] The technology of the invention treats the pentachlorophenol-containing wastewater.

[0017] Add 100mL of 10mg / L pentachlorophenol wastewater into a 250mL Erlenmeyer flask, adjust the pH to 5 by adding acetic acid under the condition of magnetic stirring, adjust the temperature to 20°C through the temperature control device, and pass oxygen until the dissolved oxygen is 40mg / L , then add horseradish peroxidase (HRP) content of 0.02U / mL waste water, reduced cocatalyst coenzyme NADH is 0.02mmol / L waste water, the reaction time is 30min.

[0018] After treatment, the removal rate of pentachlorophenol is greater than 95%, and the removal rate of COD is greater than 90%.

Embodiment 3

[0020] The technology of the invention treats the indole-containing wastewater.

[0021] Add 100mL of 20mg / L indole wastewater into a 250mL Erlenmeyer flask, adjust the pH to 8 by adding sodium carbonate under the condition of magnetic stirring, adjust the temperature to 40°C through the temperature control device, and ventilate the air until the dissolved oxygen is 10mg / L , then add horseradish peroxidase (HRP) content of 1U / mL waste water, reduced co-catalyst vitamin C is 1mmol / L waste water, the reaction time is 5min.

[0022] After treatment, the removal rate of indole is greater than 95%, and the removal rate of COD is greater than 80%.

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PUM

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Abstract

The invention relates to an enzyme treatment technique of difficult degradation organic sewage, belonging to the sewage treatment technical field. Coupling of an enzyme-reduction cocatalyst is employed at appropriate temperature and pH value, thereby catalyzing oxygen to generate superoxide radical and hydroxyl radical with extremely strong oxidation capacity, so as to remove organism from water. When the sewage is treated by the coupling of the enzyme-reduction cocatalyst, no peroxide is added; and air or oxygen is continuously led in, so as to generate hydroxyl radical with higher oxidation-reduction potential. The enzyme treatment technique is applicable to treatment of difficult degradation organic pollutant other than phenol and aniline in the sewage; in addition, the enzyme treatment technique has high removing efficiency and low treatment cost.

Description

technical field [0001] A new technology for biological enzymatic treatment of wastewater containing phenols, amines and other persistent organic pollutants, mainly used in the field of organic wastewater treatment. Background technique [0002] With the progress of human scientific and technological civilization, the discharge of domestic and industrial sewage is increasing, and the types of pollutants are also increasing, which poses a huge threat to the ecological environment and human health. The composition of sewage is very complex, and many pollutants are biodegradable, can exist in the environment for a long time, can be continuously enriched through the food chain, and will eventually be ingested by the human body. Especially the treatment of those "three causes" (carcinogenic, teratogenic, mutagenic) organic substances is still the difficulty and focus of domestic research. Due to the low concentration of persistent organic pollutants and biological toxicity, the g...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/66C02F1/72
Inventor 李玉平李海涛曹宏斌张懿
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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