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Membrane filtration-electrocatalysis treatment method for sewage

A sewage treatment method and electrocatalytic technology, applied in water/sewage treatment, water/sludge/sewage treatment, sterilization/microdynamic water/sewage treatment, etc., can solve the problems of high energy consumption and low efficiency, and achieve The effect of improving energy utilization efficiency and pollutant treatment efficiency and overcoming the shortcomings of electrocatalytic processes

Active Publication Date: 2019-12-03
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In summary, the existing water treatment methods all have the disadvantages of high energy consumption and low efficiency.

Method used

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  • Membrane filtration-electrocatalysis treatment method for sewage
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  • Membrane filtration-electrocatalysis treatment method for sewage

Examples

Experimental program
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Effect test

Embodiment 1

[0046] A tubular carbon membrane with an average pore size of 0.56 μm is used as the conductive porous membrane (anode), and stainless steel is used as the pressure shell and also serves as the cathode (counter electrode) to form a cross-flow filtration electrocatalytic membrane reactor. The depth of the effluent of a sewage treatment plant deal with. Set treatment conditions: transmembrane pressure difference 0.1MPa, membrane surface flow velocity 1.95~2.05m s -1 , water temperature 25 ~ 32 ℃, working voltage 5V.

[0047] Influent water quality (sewage) indicators are: yellowish, smelly, COD 60-320 (mg·L -1 ), ammonia nitrogen 4~27(mg·L -1 ), turbidity 18-155 (NTU), pH value 6-9.

[0048] The results show that under the condition of no electricity, the filtration flux is 0.04m 3 .m -2 .h -1 , The COD removal rate is 50.31%, the ammonia nitrogen removal rate is 75%, and the turbidity removal rate is 80%. After an electric field is applied, the permeation flux increases ...

Embodiment 2

[0050] A titanium membrane with a filtration accuracy of 0.2 μm is used as the conductive porous membrane (anode), and stainless steel is used as the pressure shell and doubles as the cathode (counter electrode) to form a cross-flow filtration electrocatalytic membrane reactor. The treatment conditions are set: transmembrane pressure difference 0.1MPa , membrane surface velocity 3.2m s -1 , the temperature is 20-28°C, the working voltage is 5V, and the raw water is simulated wastewater, wherein, the simulated wastewater contains 5% of fly ash with an average particle size of 2μm, and 30mg·L of phenol -1 , ammonia nitrogen 30mg·L -1 .

[0051] After treatment, the removal rate of fly ash is 100%, the removal rate of phenol is 83%, and the removal rate of ammonia nitrogen is 60%.

Embodiment 3

[0053] A tubular carbon membrane with an average pore diameter of 2 μm is used as the conductive porous membrane (anode), and stainless steel is used as the pressure shell and also serves as the cathode (counter electrode). The processing conditions are set: working voltage 3.2V, membrane surface flow rate 3m s -1 , the transmembrane pressure difference is 0.1MPa, and the simulated wastewater is treated, wherein, the simulated wastewater contains 500mg·L of phenol -1 .

[0054] After treatment, the removal rate of phenol was 89%.

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Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to a membrane filtration-electrocatalysis treatment method for sewage. The membrane filtration-electrocatalysis treatment method for the sewage provided by the invention comprises the following steps: connecting an electroconductive porous membrane and a counter electrode with an external power supply, enabling the sewage to flow through the electroconductive porous membrane under the driving of differential pressure, and performing membrane filtration-electrocatalysis to obtain purified water. Accordingto the method provided by the invention, membrane separation and electrocatalysis are subjected to in-situ coupling, driving energy consumed in the membrane filtration process is used as mass transfer driving force in the electrocatalysis process, so that efficient utilization of energy without equipment investment is realized; and through advantage complementation of the electrocatalysis processand the membrane filtration process, the defects of the membrane filtration process and the electrocatalysis process are overcome, and the overall energy utilization efficiency and the pollutant treatment efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a membrane filtration-electrocatalytic sewage treatment method. Background technique [0002] Membrane technology has been widely used in the field of water and wastewater treatment. At present, the membrane technologies applied in the field of water treatment mainly include microfiltration, ultrafiltration, nanofiltration, electrodialysis and reverse osmosis. Among them, microfiltration and ultrafiltration technology are mainly used for the removal of particulate matter, floc, bacteria and turbidity and for membrane-bioreactors, nanofiltration and reverse osmosis are mainly used for the removal of salts, viruses and some organic pollution in water things. The membrane process is a pressure-driven process. In the order of microfiltration, ultrafiltration, nanofiltration, and reverse osmosis, the transmembrane pressure difference increases sequentially, from a few atmos...

Claims

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Application Information

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IPC IPC(8): C02F1/467
CPCC02F1/467
Inventor 秦国彤马晶江雷
Owner BEIHANG UNIV
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