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Method for treating wastewater containing anilines

A process method and wastewater technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of death, environmental pollution and human health, and high toxicity. , to achieve the effect of simple process, convenient operation and good treatment effect

Inactive Publication Date: 2014-03-26
QINGDAO WINCHANCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Anilines are highly toxic. After inhaling their vapors or being absorbed by the skin into the body, they can be transformed into more toxic α-aminophenols in the body, resulting in serious toxic effects and even death in severe cases.
Therefore, industrial wastewater containing aniline compounds has a greater impact on environmental pollution and human health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A kind of processing method of aniline waste water, concrete operation steps are as follows:

[0015] (1) Preliminary treatment of wastewater, using steam to directly heat and blow off, and to cool, absorb and reuse ammonia-containing steam, so that the pH value of wastewater is <9;

[0016] (2) After the ammonia-removed wastewater cools down to 51°C, add acid to adjust the pH of the wastewater to 5;

[0017] (3) Under the condition of stirring, add industrial grade ferrous sulfate and hydrogen peroxide in sequence, among which the dosage of industrial grade ferrous sulfate is 1.5g / L, the dosage of hydrogen peroxide is 5.0g / L, and the reaction time is 90min ;

[0018] (4) Finally, the catalytically oxidized wastewater is then passed through a 4g / mL activated carbon tower for adsorption treatment.

[0019] After the aniline wastewater is treated by the above process, the aniline substances are reduced to below 3mg / L, which meets the national sewage discharge standa...

Embodiment 2

[0021] A kind of processing method of aniline waste water, concrete operation steps are as follows:

[0022] (1) Preliminary treatment of wastewater, using steam to directly heat and blow off, and to cool, absorb and reuse ammonia-containing steam, so that the pH value of wastewater is <9;

[0023] (2) After the ammonia-removed wastewater cools down to 55°C, add acid to adjust the pH of the wastewater to 4.0;

[0024] (3) Under the condition of stirring, add industrial grade ferrous sulfate and hydrogen peroxide in sequence, the dosage of industrial grade ferrous sulfate is 2.0g / L, the dosage of hydrogen peroxide is 6.0g / L, and the reaction time is 70min ;

[0025] (4) Finally, the catalytically oxidized wastewater is passed through a 6g / mL activated carbon tower for adsorption treatment.

[0026] After the aniline wastewater is treated by the above process, the aniline substances are reduced to below 3mg / L, which meets the national sewage discharge standard.

Embodiment 3

[0028] A kind of processing method of aniline waste water, concrete operation steps are as follows:

[0029] (1) Preliminary treatment of wastewater, using steam to directly heat and blow off, and to cool, absorb and reuse ammonia-containing steam, so that the pH value of wastewater is <9;

[0030] (2) After the ammonia-removed wastewater cools down to 60°C, add acid to adjust the pH of the wastewater to 5;

[0031] (3) Under the condition of stirring, add industrial grade ferrous sulfate and hydrogen peroxide in sequence, the dosage of industrial grade ferrous sulfate is 3.0g / L, the dosage of hydrogen peroxide is 6.5g / L, and the reaction time is 90min ;

[0032] (4) Finally, the wastewater after catalytic oxidation is passed through a 7g / mL activated carbon tower for adsorption treatment.

[0033] After the aniline wastewater is treated by the above process, the aniline substances are reduced to below 3mg / L, which meets the national sewage discharge standard.

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PUM

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Abstract

The invention discloses a method for treating wastewater containing anilines, belonging to the field of environmental protection. The method comprises the following processing steps: (1) carrying out primary treatment on the wastewater, carrying out direct heating and air stripping by steam, cooling, absorbing and reusing the steam containing ammonia, and enabling the pH value of the wastewater to be less than 9; (2) after cooling the wastewater subjected to ammonia removal to 51-60 DEG C, adding acid to regulate the pH value of the wastewater to be 3.5-5; (3) adding industrial grade iron sulfate and hydrogen peroxide in sequence under the condition of stirring the wastewater, and reacting for 61-90 minutes; (4) finally adsorbing the wastewater subjected to catalytic oxidation with a 4-7g / mL activated carbon tower. The method can enable the contents of COD (chemical oxygen demand) and anilines in original wastewater to be reduced below the national emission standards, and has the characteristics of simple process, convenience in operation and good treatment effect.

Description

[0001] technical field [0002] The invention belongs to the field of environmental protection, and in particular relates to a process for treating aniline wastewater. Background technique [0003] As important organic intermediates, aniline and chloroaniline are widely used in industries such as dyestuffs, pesticides, and medicine. Correspondingly, a large amount of wastewater containing aniline compounds will be produced in the production process, and its mass concentration can reach several hundred Even thousands of mg / L. [0004] Anilines are highly toxic. After inhaling their vapors or being absorbed by the skin into the body, they can be transformed into more toxic α-aminophenols in the body, resulting in severe toxic effects and even death in severe cases. Therefore, industrial wastewater containing aniline compounds has a greater impact on environmental pollution and human health. Contents of the invention [0005] In response to the national call for sustainabl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F101/38
Inventor 苏建丽
Owner QINGDAO WINCHANCE TECH
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