Method for continuously oxidizing organic wastewater under microwave assistance

A technology for oxidation treatment and organic wastewater, applied in the direction of oxidized water/sewage treatment, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of inability to realize online regeneration, poor COD removal effect, low regeneration temperature and pressure, etc. Achieve the effect of easy automatic production, low processing cost and mild reaction conditions

Inactive Publication Date: 2018-11-23
北京科瑞博远科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its catalyst is prepared in advance, and cannot be regenerated online, and cannot be fully continuous
[0006] In the Chinese patents with application numbers 201610165112.1 and 201710359301.7, two rotary microwave wastewater treatment devices are disclosed respectively, both of which adopt the steps of adsorption-treatment-regeneration to realize the continuous treatment of wastewater, and the organic matter in the wastewater is adsorbed on the adsorbent Then, the adsorbent is regenerated by microwave oxidation treatment, but the adsorption process does not have the effect of microwave oxidation, the regeneration temperature and pressure are low, and the COD removal effect is poor

Method used

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  • Method for continuously oxidizing organic wastewater under microwave assistance

Examples

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Embodiment 1

[0032] Air Oxidation of Simulated Wastewater Containing Phenols Catalyzed by Continuous Microwave Assisted Activated Carbon Supported Copper Catalysts

[0033] A device for continuous microwave-assisted oxidation treatment of organic wastewater, see figure 1 Shown, comprise reaction device, and the feed pipe that links to each other with reaction device respectively, discharge pipe and microwave generator 1; The device B 3 is composed of; feed pipe includes waste water feed pipe 4, regeneration feed pipe 5, oxidant feed pipe 6 and nitrogen feed pipe 7; discharge pipe includes treated water discharge pipe 8 and regeneration drain pipe 9; waste water Feed pipe 4, regeneration drain pipe 9, oxidant feed pipe 6 and nitrogen feed pipe 7 are all communicated with the bottom of reactor A 2 and reactor B 3 respectively, treated water outlet pipe 8, regeneration feed pipe 5 are respectively Both communicate with the upper part of reactor A 2 and reactor B 3; reactor A 2 and reactor B ...

Embodiment 2

[0048] Air Oxidation of Simulated Wastewater Containing Phenol Catalyzed by Continuous Microwave Assisted Activated Carbon Supported Iron Catalyst

[0049] The same operating form and apparatus as in Example 1 were adopted. In order to compare the treatment effects of different catalysts, two cycle operations were carried out, and each cycle treated wastewater for 72 hours.

[0050] (1) Granular activated carbon enters the interior of the reactor from the upper end of the reactor, and the reactor is filled to form a fixed bed; both reactors are filled with 50g of granular activated carbon.

[0051] (2) Take 312ml of 65% concentrated nitric acid solution and add water to 500ml to make a solution. Weigh 100g of ferric nitrate nonahydrate into the solution and stir to dissolve. Feed the ferric nitrate solution prepared from the upper part of the reactor A, and the flow rate is controlled at 2-3BV / h. After passing through, continue to pass into 200ml of water. Empty the water i...

Embodiment 3

[0061] Air Oxidation of Simulated Wastewater Containing Phenol Catalyzed by Continuous Microwave Assisted Activated Carbon Supported Manganese Catalyst

[0062] The same operating form and apparatus as in Example 1 were adopted. In order to compare the treatment effects of different catalysts, two cycle operations were carried out, and each cycle treated wastewater for 72 hours.

[0063] (1) Granular activated carbon enters the interior of the reactor from the upper end of the reactor, and the reactor is filled to form a fixed bed; both reactors are filled with 50g of granular activated carbon.

[0064] (2) Put 44g of manganese nitrate into 500ml of water and stir to dissolve. Pass through the prepared manganese nitrate solution from the upper part of the reactor A, and the flow rate is controlled at 2-3BV / h. After passing through, continue to pass into 200ml of water. Empty the water in the reactor, and then blow it dry with air. Introduce nitrogen, turn on the microwave,...

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Abstract

The invention discloses a method for continuously oxidizing organic wastewater under microwave assistance, and belongs to the field of wastewater treatment. The method comprises the following steps: (1) introducing a catalyst carrier into a reactor; (2) loading a metal salt solution on the carrier for preparing a catalyst; (3) under the action of microwaves, introducing an oxidizing agent and wastewater; (4) performing catalyt regeneration when the catalyt treatment efficiency is lowered to a certain degree; (5) repeating the step (3) and the step (4) to realize continuous treatment of the wastewater. By adopting the method, continuous operation of catalyst preparation, wastewater treatment and catalyst regeneration can be realized, and the utilization efficiency of the catalyst is improved, so that organic matters in the wastewater can be removed efficiently, continuously and effectively at low cost.

Description

technical field [0001] The invention relates to a method for continuous microwave-induced catalytic oxidation of high-concentration organic wastewater, which belongs to the field of wastewater treatment. Background technique [0002] Water is a precious resource that human beings depend on for survival. However, with the rapid development and expansion of modern industrial production scale, a large amount of wastewater containing refractory, toxic, harmful, ammonia nitrogen compounds, suspended solids and other pollutants discharged during the production process has a very large degree of pollution to the environment. Treatment methods such as biological or physical and chemical purification have been difficult to meet the technical and economic requirements. Therefore, the purification and treatment of this kind of industrial organic wastewater has become one of the difficult problems in the field of environmental protection at home and abroad, and has attracted more and m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/72C02F1/74C02F1/76C02F1/78C02F101/34
CPCC02F1/302C02F1/722C02F1/725C02F1/727C02F1/74C02F1/76C02F1/78C02F2101/345
Inventor 徐更张桂华周旭康谢博亮周玉
Owner 北京科瑞博远科技有限公司
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