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Electrochemical-membrane separation water treating device, treating method and application thereof

A technology of water treatment device and treatment method, which is applied in chemical instruments and methods, sterilization/microdynamic water/sewage treatment, water/sewage treatment, etc. Change the molecular structure, slow down membrane fouling, and improve the effect of effluent quality

Active Publication Date: 2017-12-12
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is still the problem of high energy consumption, and the existing method of combining electrochemistry with membrane technology still needs to be improved in terms of slow release of membrane fouling

Method used

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  • Electrochemical-membrane separation water treating device, treating method and application thereof
  • Electrochemical-membrane separation water treating device, treating method and application thereof

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Effect test

Embodiment 1

[0051] This embodiment provides an electrochemical-membrane separation water treatment device and a treatment method thereof. The device includes a reaction tank 5 in which a membrane module 4 is arranged, and one side of the membrane module 4 is parallel from the inside to the outside A sensing electrode 2 and an anode plate 1 are arranged on the membrane assembly 4, the other side of the membrane assembly 4 is arranged with a cathode plate 3 parallel to the membrane assembly 4, and the anode plate 1 and the cathode plate 3 are connected to an external power source 9;

[0052] A water inlet 6 is provided on one side of the main body of the reaction tank 5, and a water return port 7 is provided on the side opposite to the water inlet; the main body of the reactor 5 is provided with a membrane module water outlet 8. The membrane module water outlet 8 and the membrane module 4 Connected.

[0053] Wherein, the anode plate 1 is a titanium ruthenium electrode; the number of anode plates...

Embodiment 2

[0064] This embodiment provides an electrochemical-membrane separation water treatment device and a treatment method thereof. The structure of the device is referred to embodiment 1. The difference is that the number of anode plates 1 is two, and the number of cathode plates 3 is Two, the membrane module 4 is a hollow fiber membrane; the membrane element in the membrane module 4 is an ultrafiltration membrane.

[0065] The device is used to treat industrial sewage, in which the TOC content is 450ppm, the turbidity is 60NTU, and the processing capacity is 3000L·m -2 ·H -1 .

[0066] The processing method refers to Example 1, the difference is: in step (1), the current density is adjusted to 10A / m 2 , The transmembrane pressure difference is 35kPa.

[0067] In this embodiment, the membrane flux after pollution in step (a) is 2463L·m -2 ·H -1 , The contact angle is 64.22°, the apparent porosity of the filter cake layer is 14.77%, and the pore size of the filter cake layer is 13 nm.

[00...

Embodiment 3

[0070] This embodiment provides an electrochemical-membrane separation water treatment device and a treatment method thereof. Refer to Embodiment 1 for the structure of the device.

[0071] The device is used to treat industrial wastewater, in which the TOC content is 450ppm, the turbidity is 60NTU, and the processing capacity is 3500L·m -2 ·H -1 .

[0072] The processing method refers to Example 1, the difference is: in step (1), the current density is adjusted to 15A / m 2 , The transmembrane pressure difference is 25kPa.

[0073] In this embodiment, the membrane flux after pollution in step (a) is 2990.75L·m -2 ·H -1 , The contact angle is 61.34°, the apparent porosity of the filter cake layer is 15.87%, and the pore size of the filter cake layer is 16 nm.

[0074] The drinking water obtained after treatment has a TOC content of 0.5 ppm, a turbidity reduced to 0 NTU, and a pollutant separation efficiency of 97%.

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Abstract

The invention provides an electrochemical-membrane separation water treating device, a treating method and an application thereof. The electrochemical-membrane separation water treating device comprises a reaction tank, wherein the reaction tank is internally provided with a membrane component; one side of the membrane component is provided with a sensing electrode and an anode plate from inside to outside in a manner of being parallel to the membrane component; the other side of the membrane component is provided with a cathode plate parallel to the membrane component; the anode plate and the cathode plate are connected with an external power supply; a water inlet is arranged at one side of a main body of the reaction tank; and a water outlet of the membrane component is arranged on the main body of the reaction tank and is connected with the membrane component. The electrochemical-membrane separation water treating device, the treating method and the application provided by the invention have the advantages that electric-field effect, electrochemical oxidation, electroflocculation and electroflotation are integrated, and by the action of electrooxidation and electroflocculation, the structure of pollutants is changed, the size of particles is adjusted, and a hydrophilic and porous filter cake layer is formed on the membrane surface, so that the pollution to the membrane is reduced; and the solid-liquid separation is carried out by membrane filtration, so that the quality of discharged water is further improved.

Description

Technical field [0001] The invention belongs to the field of drinking water or sewage treatment, and relates to an electrochemical-membrane separation water treatment device and a treatment method and application thereof. Background technique [0002] Ultrafiltration membrane separation technology uses the volume exclusion effect to trap pollutants larger than the membrane pore size, but at the same time, membrane pollution is formed due to the accumulation of trapped pollutants on the membrane surface and the growth of microorganisms in the water body on the membrane surface , Which reduces the service life of the membrane and increases the application cost of membrane separation technology. In order to prolong the service life of the membrane, the pretreatment of the water body before membrane separation has been proven effective. Commonly used pretreatment methods include pre-flocculation, pre-oxidation, and pre-aeration, among which pre-flocculation and pre-oxidation are mor...

Claims

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Application Information

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IPC IPC(8): C02F1/44C02F1/463C02F1/467
CPCC02F1/44C02F1/463C02F1/4672
Inventor 曲久辉孙境求胡承志刘会娟刘锐平马百文
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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