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 refra

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

Example Embodiment

[0186] Example 1 Continuous reaction

[0187] Waste water having a concentration of 10,000 ppm (COD in the wastewater is 23000mg / L), the waste flow rate is 5t / h, the octopurized is a platinum electrode (PTTI-01, purchased from Dalian Kukui environment), the cathodes are ruthenium oxidation Electrode (RUTI-01, purchasing from Dalian Kukui environment), selecting a yin yang in the front side of the circular arc, coaxial arrangement with the reactor, the electrode mounting method is the lower end of the electrode inside the reactor (WEO + WAO), no catalyst, sodium nitrate in wastewater is 0.5% by weight, air flow 450 nm 3 / h, mixed with oxygen and oxygen, mixed with oxygen, to obtain a gas-liquid mixture, heat the mixture of the gas-liquid mixture and warmed up, and then the high-temperature high pressure gas-liquid mixture was transferred into the reactor, and the reaction temperature was 250 ° C, the reaction pressure 6.5 MPA (ie, the pressure in the reactor), current density ...

Example Embodiment

[0193] Example 2 Continuous reaction

[0194] Waste water having a concentration of 10,000 ppm (23,000 mg / L in the wastewater), the waste water flow rate is 5t / h, the octave is a platinum electrode (PTTI-02, Dalian Kukui environment), cathode is a ruthenium titanium oxide electrode (RUTI-03, Dalian Kukuo Environment), selecting a yin yang in a circular arc-shaped front relative and a combination of catalyst and electrodes in a combination of catalyst and electrodes in the reactor in a combination of catalyst and electrodes in the reactor in a combination of catalyst and electrodes in the reactor (CWEO) + WAO), the added catalyst is a ball type Fe / aluminum oxide catalyst (Kd-Feal, Dalian Kuchen Environment), the sodium nitrate of the wastewater is 0.1% by weight, air flow 450 nm 3 / h, mixed with oxygen and oxygen, mixed with oxygen, to obtain a gas-liquid mixture, heat the mixture of the gas-liquid mixture to heat the temperature, then pass the high-temperature high pressure...

Example Embodiment

[0199] Example 3 Continuous reaction

[0200] Waste water concentration of 5000 ppm (12670mg / L in the wastewater), the waste water flow rate is 1T / h, and the octave is the primary electrode (PBTI-03, Dalian Kukui environment), the cathode is ruthenium titanium The oxide electrode (RUTI-03, Dalian Kukuo environment), the anode of the Yin Yinyang is a ring in the internal cathode to the outer arrangement, the electrode mounting method is the upper end of the electrode inside the reactor (WaO + WEO) , No catalyst, sodium nitrate and sodium sulfate (mass ratio 1: 1) in wastewater (mass ratio 1: 1), air flow 50 nm 3The wastewater is mixed with oxygen to obtain a gas-liquid mixture, and the gas-liquid mixture is heated, and then the high-temperature high pressure gas-liquid mixture is transferred into the reactor, and the vacuum speed is 2 h. -1 The reaction temperature is 240 ° C, the reaction pressure is 5.5 MPa; the current density is controlled to 30 mA / cm 2 .

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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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