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Fenton optimization oxidation treatment method for wastewater

A technology of oxidation treatment and treatment method, applied in oxidation water/sewage treatment, chemical instruments and methods, filtration treatment, etc., can solve problems such as waste, pH reduction, influence, etc., to reduce treatment costs, complete Fenton reaction, and operate simple effect

Inactive Publication Date: 2021-01-01
石家庄新奥环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Fenton reaction will produce ferric ions, which will inevitably cause waste in the catalytic decomposition of hydrogen peroxide, and the oxidation reaction will release heat. The higher the temperature, the higher the concentration of iron ions, the faster the decomposition rate of hydrogen peroxide, and the more waste; most oxidation reactions will produce Acidic substances reduce the pH. If the pH is adjusted to 3-4 in the early stage, the acidic substances generated during the reaction will reduce the pH. The pH of some materials will be reduced to 1 or even lower during the reaction process, which will affect the reaction and even stop the reaction.

Method used

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  • Fenton optimization oxidation treatment method for wastewater
  • Fenton optimization oxidation treatment method for wastewater

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Embodiment 1

[0035] A method for Fenton optimized oxidation treatment of wastewater, the treatment method comprising the steps of:

[0036] Add hydrogen peroxide to the waste water for reaction. After 30 minutes of reaction, since the concentration of waste water that can be oxidized by hydrogen peroxide is very low at this time, the reaction rate drops significantly. Let the residual hydrogen peroxide react with the waste water material for 30 minutes. After the reaction is completed, adjust the pH to 3. -4, and add ferrous sulfate solution (the mass concentration of ferrous sulfate is 20%) and stir for 4 minutes;

[0037] Afterwards, hydrogen peroxide was added again for reaction. During the reaction, the pH was controlled to be not lower than 2, and the temperature was not higher than 45 degrees Celsius. After reacting for 1 hour, an aqueous solution of sodium hydroxide (30% in mass concentration) was added to adjust the pH to 8-9, and then added Aluminum chloride and polyacrylamide wer...

Embodiment 2

[0044] A method for Fenton optimized oxidation treatment of wastewater, the treatment method comprising the steps of:

[0045]Add hydrogen peroxide to the wastewater for reaction. After 80 minutes of reaction, the concentration of wastewater that can be oxidized by hydrogen peroxide is very low at this time, so the reaction rate drops significantly. Let the residual hydrogen peroxide react with the wastewater material for 120 minutes. After the reaction is completed, adjust the pH to 3. -4, and add ferrous sulfate solution (the mass concentration of ferrous sulfate is 25%) and stir for 15 minutes;

[0046] Afterwards, hydrogen peroxide was added again for reaction. During the reaction, the pH was controlled to be not lower than 2, and the temperature was not higher than 45 degrees Celsius. After reacting for 3 hours, an aqueous solution of potassium hydroxide (30% in mass concentration) was added to adjust the pH to 8-9, and then added Alum and bentonite are allowed to settle ...

Embodiment 3

[0051] A method for Fenton optimized oxidation treatment of wastewater, the treatment method comprising the steps of:

[0052] Add hydrogen peroxide to the waste water for reaction. After 45 minutes of reaction, since the concentration of waste water that can be oxidized by hydrogen peroxide is very low at this time, the reaction rate drops significantly. Let the residual hydrogen peroxide react with the waste water material for 45 minutes. After the reaction is completed, adjust the pH to 3. -4, and add ferrous sulfate solution (the mass concentration of ferrous sulfate is 20%) and stir for 6 minutes;

[0053] Then add hydrogen peroxide again to react. During the reaction, the pH is controlled to be not lower than 2, and the temperature is not higher than 45 degrees Celsius. After reacting for 1.5 hours, add calcium hydroxide aqueous solution (mass concentration is 30%) to adjust the pH to 8-9, and then add Basic aluminum chloride and diatomaceous earth, settling for 45 minut...

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Abstract

The invention belongs to the technical field of wastewater treatment, and discloses a Fenton optimization oxidation treatment method for wastewater. According to the treatment method, organic mattersin the wastewater can be degraded in a targeted manner by controlling the adding points, the adding amounts and the pH adjusting points of hydrogen peroxide and ferrous sulfate. The treatment method is simple to operate, can enable the Fenton reaction to be carried out in more forward treatment directions, reduces the dosages of hydrogen peroxide, ferrous ions, early-stage acid regulation and later-stage alkali regulation, improves the utilization rate of drugs, reduces the treatment cost, enables the Fenton reaction to be more thorough, and further solves the problems of large dosage and poorremoval effect during optimization of waste liquid treatment.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a method for Fenton optimization oxidation treatment of wastewater. Background technique [0002] Some modern industries produce high COD wastewater during their operation. COD is used to characterize the amount of oxidizable substances in wastewater, which refers to the chemical oxygen demand of wastewater, also known as chemical oxygen demand. The Fenton reaction can oxidize and remove oxidizable substances in wastewater (such as refractory organic matter, etc.), effectively treat wastewater, and reduce wastewater COD. [0003] The principle of Fenton oxidation is that ferrous ions combine with hydrogen peroxide to form highly reactive hydroxyl radicals. Hydroxyl radicals are extremely oxidizing, about twice as strong as oxygen, and are located between atomic oxygen and fluorine, so they can interact with, for example, most organic substances to degra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/66C02F1/52C02F1/56C02F101/30
CPCC02F1/722C02F1/66C02F1/5245C02F1/56C02F1/001C02F2101/30C02F2301/08
Inventor 任涛让郄雪光郜子兴杜亚威武斌张冀青
Owner 石家庄新奥环保科技有限公司
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