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Treatment method for aniline wastewater

A technology for aniline wastewater and a treatment method, which is applied in the field of water treatment, can solve the problems of high requirements for wastewater components and high treatment costs, and achieves the effects of cost reduction and good operation stability.

Inactive Publication Date: 2019-12-20
XIAMEN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method involves a large number of microbial cultivation processes, not only has high requirements for the wastewater components used, but also has high treatment costs

Method used

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  • Treatment method for aniline wastewater
  • Treatment method for aniline wastewater
  • Treatment method for aniline wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] To prepare co-immobilized enzymes, proceed as follows:

[0033] Step 1: Prepare a mixed buffer solution of catalase and laccase.

[0034] Preparation of phosphate buffer:

[0035] Weigh Na 2 HPO 4 3.4092g, NaH 2 PO 4 1.5944g, dissolved in distilled water, adjusted to pH 7.0, and adjusted to 500mL to obtain 0.05M phosphate buffer, stored at 4°C (boiled before use).

[0036] Preparation of catalase solution:

[0037] Accurately weigh a certain quality of catalase freeze-dried powder (commercially available product) on an electronic balance, dissolve in the phosphate buffer saline solution of 0.05M with pH=7, obtain the enzyme solution of certain concentration, place 4 after preparing ℃ refrigerator and use as soon as possible.

[0038] Preparation of acetic acid-sodium acetate buffer:

[0039] Solution 1: 0.2mol / L sodium acetate solution, take 8.2g sodium acetate, dissolve it in deionized water and set the volume in a 500mL volumetric flask.

[0040] Solution 2...

Embodiment 2

[0047] Take the co-immobilized enzyme prepared in Example 1, put 4g of co-immobilized enzyme into a 250mL Erlenmeyer flask, add 100mL of aniline simulated wastewater, add H 2 o 2 As a pro-oxidant, the dosage is 0.3wt% of the aniline simulated wastewater, adjust the pH=5, place each group of Erlenmeyer flasks in a constant temperature shaker at 35°C and a speed of 140rpm, and shake the reaction. The total reaction time is 24h. After the end, the removal rate of aniline was measured as high as 73.26%.

Embodiment 3

[0049] Weigh the co-immobilized enzyme prepared in Example 1, put 6g of co-immobilized enzyme into a 250mL Erlenmeyer flask, add 100mL of aniline simulated wastewater, and place each group of Erlenmeyer flasks in a constant temperature shaker at 25°C and a speed of 140rpm , shaking reaction, the total reaction time is 24h, and the removal rate of aniline is as high as 71.8% after the reaction.

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Abstract

The invention relates to a treatment method for aniline wastewater. According to the method, a catalase and laccase co-immobilized enzyme is added into the aniline wastewater, H2O2 is added as a pro-oxidant, pH is adjusted, isothermal shaking table treatment is carried out, a shaking reaction is carried out, and thus, the removal rate of aniline reaches up to 73.17%; and the catalase and laccase co-immobilized enzyme can be recycled repeatedly and can still be used for removing 57.17% of aniline after 5 times of duty-cycle operation, the operational stability to the aniline wastewater is relatively good, and thus, the wastewater treatment cost of practical application can be greatly reduced.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for treating aniline wastewater. Background technique [0002] Aniline is an oily liquid at room temperature, colorless and has an aromatic smell. It is widely used in modern industries such as plastics, printing and dyeing, pesticides and medicine, and its wastewater is mainly produced in the chemical processes of these industries. However, aniline compounds are poisonous and are a kind of three-causing substances, that is, "teratogenic, carcinogenic, and mutagenic". These substances pollute the ecological environment and are harmful to human health. If the skin comes into contact with aniline or inhales the substance in daily life, it will invade the human tissue and cause hypoxia, and the body will have adverse reactions such as dizziness and headaches. If it is exposed to aniline for a long time, the cells will mutate and cause cancer. , affecting nervous sy...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F101/38
CPCC02F3/342C02F2101/38
Inventor 傅海燕吴冬阳高攀峰柴天梁健臻龙绛雪金月正
Owner XIAMEN UNIV OF TECH