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Method and reaction device for degrading organic wastewater

An organic wastewater and reaction technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve the problem of unsatisfactory effect of high concentration refractory wastewater, achieve high TOC removal rate and improve degradation ability. , the effect of convenient operation

Active Publication Date: 2021-06-25
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, research has found that the electrochemical oxidation process only has a good effect on low-concentration organic wastewater, and is not ideal for high-concentration refractory wastewater (A.Dominguez-Ramos, R.Aldaco, A.Irabien, Electrochemical Oxidation of Lignosulfonate: Total Organic Carbon Oxidation Kinetics, Ind Eng Chem Res, 47(2008) 9848-9853

Method used

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  • Method and reaction device for degrading organic wastewater
  • Method and reaction device for degrading organic wastewater
  • Method and reaction device for degrading organic wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0186] Embodiment 1 continuous reaction

[0187] The m-cresol concentration is 10000ppm wastewater (COD in the wastewater is 23000mg / L), the wastewater flow rate is 5t / h, the anode is selected as a platinum electrode (PtTi-01, purchased from Dalian Keduo Environment), and the cathode is ruthenium titanium oxide The material electrode (RuTi-01, purchased from Dalian Keduo Environment), chooses a negative and positive arc-shaped front facing and coaxial arrangement with the reactor, and the electrode installation method is that the electrode is at the lower end of the reactor (WEO+ WAO), without catalyst, sodium nitrate dosage in waste water is 0.5wt%, air flow 450Nm 3 / h, pressurize waste water and oxygen and mix respectively to obtain a gas-liquid mixture, heat the gas-liquid mixture to raise the temperature, and then pass the high-temperature and high-pressure gas-liquid mixture into the reactor with a reaction temperature of 250°C and a reaction pressure of 6.5 MPa (ie the ...

Embodiment 2

[0193] Embodiment 2 continuous reaction

[0194] The wastewater with m-cresol concentration of 10000ppm (COD in the wastewater is 23000mg / L), the wastewater flow rate is 5t / h, the anode is selected as a platinum electrode (PtTi-02, Dalian Keduo Environment), and the cathode is a ruthenium titanium oxide electrode (RuTi-03, Dalian Keduo Environment), choose the way that one yin and one yang are opposite to each other in an arc shape and arranged coaxially with the reactor. The combination of the catalyst and the electrode is that the catalyst and the electrode are at the lower end of the reactor (CWEO +WAO), the catalyst added is a spherical Fe / alumina catalyst (KD-FeAl, Dalian Keduo Environment), the dosage of sodium nitrate in the wastewater is 0.1wt%, and the air flow rate is 450Nm 3 / h, pressurize waste water and oxygen and mix respectively to obtain a gas-liquid mixture, heat the gas-liquid mixture to raise the temperature, and then pass the high-temperature and high-press...

Embodiment 3

[0199] Embodiment 3 continuous reaction

[0200] The concentration of isophorone is 5000ppm wastewater (COD in the wastewater is 12670mg / L), the wastewater flow rate is 1t / h, the anode is selected as a lead dioxide electrode (PbTi-03, Dalian Keduo Environment), and the cathode is ruthenium titanium Oxide electrode (RuTi-03, Dalian Keduo Environment), choose a positive and negative anode as a ring, and the cathode is arranged in a ring outside, and the electrode installation method is that the electrode is at the upper end of the reactor (WAO+WEO) , no catalyst, the dosage of sodium nitrate and sodium sulfate (mass ratio 1:1) in the wastewater is 1wt%, and the air flow rate is 50Nm 3 / h, pressurize waste water and oxygen and mix respectively to obtain a gas-liquid mixture, heat the gas-liquid mixture to raise the temperature, and then pass the high-temperature and high-pressure gas-liquid mixture into the reactor, and the waste water space velocity is 2h -1 , the reaction tempe...

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Abstract

The invention discloses a method and a device for degrading high-concentration and high-salinity organic wastewater through catalytic wet electrooxidation. The method comprises the steps of degrading the organic wastewater by combining a (catalytic) wet oxidation technology with an electro-catalysis technology to obtain a purified liquid. According to the method, after the electric field is introduced, active species generated by the anode can accelerate the induction process of the reaction, and hydrogen peroxide generated by the specific cathode can also improve the degradation capacity of the system. The method forms a remarkable synergistic effect with a traditional (catalytic) wet oxidation technology, and has a good application prospect in treatment of high-concentration and high-salinity organic wastewater.

Description

technical field [0001] The application relates to a method and a reaction device for degrading organic wastewater, belonging to the technical field of wastewater purification. Background technique [0002] The rapid development of the national economy has also caused increasingly serious water pollution problems. The use of a large number of pesticides and herbicides in the agricultural production process and the discharge of electroplating, printing and dyeing, and petroleum wastewater in the industry have caused great environmental pollution problems and endangered human health. The complexity and high content of organic pollutants in sewage far exceed the self-purification ability of the environment. Currently commonly used biochemical methods are relatively difficult to degrade macromolecular organic pollutants with poor biodegradability. In order to achieve effective degradation of organic matter in water, advanced oxidation technology (AOPs) emerged as the times requi...

Claims

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Application Information

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IPC IPC(8): C02F1/467C02F1/72C02F1/461C02F101/10C02F101/30
CPCC02F1/4672C02F1/725C02F1/72C02F1/46109C02F2101/10C02F2101/30C02F2301/066C02F2001/46133
Inventor 孙承林谭向东卫皇曌靳承煜荣欣
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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