Unlock instant, AI-driven research and patent intelligence for your innovation.

Device and method for treating perfluorinated compound wastewater through electro-catalysis-electric flocculation cooperation

A perfluorinated compound and synergistic treatment technology, applied in chemical instruments and methods, oxidized water/sewage treatment, water/sewage treatment, etc., can solve the problems of inability to degrade and remove perfluorinated compounds in water, reduced treatment efficiency, and high operating costs. Achieve the effect of low device cost, fast response speed, and no secondary pollution

Inactive Publication Date: 2022-03-15
NANJING UNIV OF TECH
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adsorption technology is simple, efficient, and low-cost, but it only transfers perfluorinated compounds from one carrier to another, and the pollutants are not degraded at all, and their subsequent disposal may cause secondary pollution; membrane separation method The essence is to use physical methods to treat perfluorinated compounds in water without affecting the structure of pollutants, and it is easy to cause membrane fouling and reduce the treatment efficiency; biological treatment process cannot degrade and remove perfluorinated compounds in water, and the concentration reduction mainly depends on Activated sludge adsorbs it; although the ozone oxidation method has strong oxidation ability, it has a large investment and high operating cost

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device and method for treating perfluorinated compound wastewater through electro-catalysis-electric flocculation cooperation
  • Device and method for treating perfluorinated compound wastewater through electro-catalysis-electric flocculation cooperation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 As shown, a kind of electric flocculation synergistic electrocatalytic device, comprises lead wire, external power supply one 17, external power supply two 18 and electroflocculation cell 9 and electrocatalysis cell 14 that are connected successively by pipeline, is provided between electroflocculation cell 9 and electrocatalysis cell There is a check valve 4, the external power supply one 17 is respectively connected with the anode electrode and the cathode electrode in the electroflocculation cell 9 through wires, and the external power supply two 18 is respectively connected with the anode electrode and the cathode electrode in the electrocatalytic cell 14 through wires, and the electroflocculation The outer end of the pool 9 is provided with a water inlet pipe 5, the outer end of the electrocatalytic cell 14 is provided with a water outlet pipe 13, and the inside of the electroflocculation cell 9 and the electrocatalytic cell 14 is provided with a pH...

Embodiment 2

[0035] An electrocoagulation synergistic catalytic method for treating perfluorinated compound wastewater, comprising the following steps:

[0036] Prepare 2000mL of perfluorinated compound wastewater to be treated with a concentration of 50mg / L, adjust the pH value to 7, and the wastewater is fed from the water inlet pipe 5 at a flow rate of 500mL / min. 14 The distance between the anode electrode and the cathode electrode is 1cm, and the electric flocculation cell is adjusted by an external power supply 15. The current density is 30A / m 2 , adjust the current density of the electrocatalytic cell to 100A / m through an external power supply 216 2 , After 120 minutes of treatment, the concentration of perfluorinated compounds at the 13 outlets of the water pipe was detected, combined with the concentration of perfluorinated compounds in the wastewater to be treated, the degradation rate of perfluorinated compounds was calculated.

Embodiment 3

[0038] The method is the same as in Example 2, the difference is that the current density of the electric coagulation cell 9 DC power supply is 60A / m adjusted by an external power supply-15 2 , adjust the current density of the electrocatalytic cell to 200A / m through an external power supply 216 2 , to calculate the degradation rate of perfluorinated compounds.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an electric flocculation synergistic electro-catalysis device which comprises a wire, an external power source I, an external power source II, an electric flocculation tank and an electro-catalysis tank, the electric flocculation tank and the electro-catalysis tank are sequentially communicated through a pipeline, and a check valve is arranged between the electric flocculation tank and the electro-catalysis tank. The external power supply I is respectively connected with an anode electrode and a cathode electrode in the electric flocculation tank through wires, the external power supply II is respectively connected with an anode electrode and a cathode electrode in the electro-catalysis tank through wires, a water inlet pipe is arranged at the outer end of the electric flocculation tank, and a water outlet pipe is arranged at the outer end of the electro-catalysis tank. According to the method, the perfluorinated compound is directly or indirectly oxidized on the anode and adsorbed and precipitated in the electric flocculation unit by adopting the synergistic effect of catalysis, reduction and flocculation processes in the electro-catalysis tank and the electric flocculation tank, so that the perfluorinated compound is removed, metal ions and the perfluorinated compound in the wastewater can be synchronously removed, the reaction speed is high, and the operation is simple. Perfluorinated compounds in sewage are efficiently treated, and secondary pollution is avoided.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an electrocatalysis-electrocoagulation co-processing device and method for perfluorinated compound wastewater. Background technique [0002] Perfluorinated compounds are straight-chain or branched-chain hydrocarbons in which all hydrogen atoms are replaced by fluorine atoms. Because of their excellent chemical stability, low surface tension and hydrophobic and oleophobic properties, they are often used as surfactants and protective agents. Agents are widely used in industrial production and living consumption and other fields. As a new class of organic pollutants, perfluorinated compounds have been discovered and confirmed for their persistence, bioaccumulation and long-range migration. Toxicological studies in recent years have shown that perfluorinated compounds have typical hepatotoxicity, neurotoxicity, reproductive toxicity, immunotoxicity, etc., can interfere ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/463C02F1/467C02F1/461C02F1/70C02F1/72C02F101/14C02F101/20
CPCC02F1/463C02F1/4672C02F1/4676C02F1/46109C02F1/72C02F1/70C02F2101/20C02F2101/14C02F2001/46138C02F2001/46142
Inventor 徐安琳曹利亚杨梓妍宋子豪刘家扬张永军
Owner NANJING UNIV OF TECH