Method for relieving pollution of carbon fiber paper-polyether sulfone compound conductive separation membrane

A technology of carbon fiber paper and composite conduction, which is applied in the field of water treatment, can solve the problems such as the decline of conductivity, and achieve the effects of excellent conductivity, alleviating membrane fouling, and alleviating membrane fouling

Pending Publication Date: 2019-07-23
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the problem that the conductivity of the carbon fiber paper-polyethersulfone composite conductive separation membrane decreases after pollution

Method used

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  • Method for relieving pollution of carbon fiber paper-polyether sulfone compound conductive separation membrane
  • Method for relieving pollution of carbon fiber paper-polyether sulfone compound conductive separation membrane
  • Method for relieving pollution of carbon fiber paper-polyether sulfone compound conductive separation membrane

Examples

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Effect test

Embodiment 1

[0035] A method for alleviating carbon fiber paper-polyethersulfone composite conductive separation membrane pollution:

[0036] 1) After installing the carbon fiber paper-polyethersulfone composite conductive separation membrane in the cross-flow filtration device, under the pressure of 0.4Mpa, use deionized water to pre-press the membrane for 120 minutes to obtain a stable filtration membrane water flux; Adjust to the set operating pressure of 0.1Mpa, connect the balance to the computer, and use software to record the quality of the leachate. This measurement can be stopped when the mass change of leachate (referring to deionized water here) per minute is less than 2% (about 30 minutes).

[0037]2) Dissolve 10 milligrams of bovine serum albumin in 10 millimolar sodium sulfate solution, then replace the deionized water with the bovine serum albumin solution, still connect the balance to the computer, and apply voltages of 0V, 0.5V, 1V, At 2V and 3V, use the software to recor...

Embodiment 2

[0040] A method for alleviating carbon fiber paper-polyethersulfone composite conductive separation membrane pollution:

[0041] 1) After installing the carbon fiber paper-polyethersulfone composite conductive separation membrane in the cross-flow filtration device, under the pressure of 0.4Mpa, use deionized water to pre-press the membrane for 120 minutes to obtain a stable filtration membrane water flux; Adjust to the set operating pressure of 0.1Mpa, connect the balance to the computer, and use software to record the quality of the leachate. This measurement can be stopped when the mass change of leachate (referring to deionized water here) per minute is less than 2% (about 30 minutes).

[0042] 2) Dissolve 10 mg of sodium alginate in 10 mmol of sodium sulfate solution, then replace deionized water with sodium alginate solution, still connect the balance to the computer, and apply voltages of 0V, 0.5V, 1V, At 2V and 3V, use the software to record the quality of the leachat...

Embodiment 3

[0045] A method for alleviating carbon fiber paper-polyethersulfone composite conductive separation membrane pollution:

[0046] 1) After installing the carbon fiber paper-polyethersulfone composite conductive separation membrane in the cross-flow filtration device, under the pressure of 0.4Mpa, use deionized water to pre-press the membrane for 120 minutes to obtain a stable filtration membrane water flux; Adjust to the set operating pressure of 0.1Mpa, connect the balance to the computer, and use software to record the quality of the leachate. This measurement can be stopped when the mass change of leachate (referring to deionized water here) per minute is less than 2% (about 30 minutes).

[0047] 2) Dissolve 10 mg of yeast in 10 millimolar sodium sulfate solution, then replace deionized water with yeast solution, still connect the balance to the computer, and apply voltages of 0V, 0.5V, 1V, 2V, and 3V respectively , use the software to record the quality of the leachate, en...

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Abstract

The invention discloses a method for restraining membrane pollution of a carbon fiber paper-polyether sulfone compound conductive separation membrane in a cross-flow system by utilizing an auxiliary electric field. The method comprises the following steps: guiding a feeding liquor to flow in from one side above a cross-flow filtering mold; guiding one part to flow out from the other side above themold along a horizontal direction and using as effluent; guiding the other part to pass by the carbon fiber paper-polyether sulfone compound conductive separation membrane along a vertical direction,and then guiding leachate to flow out from the lower side of the mold. A separation membrane is placed in the middle of the mold; silica gel gaskets on the two sides are used for separating the mold;a polyether sulfone surface of the membrane is upward; one side of carbon fiber paper of the membrane is used as a cathode; a titanium sheet embedded under the mold is used as an anode; the two electrodes are separated by a silica gel gasket and are connected with a direct current power supply by wires; the range of applied direct current voltage is 0-3V; the membrane pollution caused by variouscharge pollutants can be effectively relieved under a combined action of electrostatic repulsion of electric field and shear force of water flow.

Description

technical field [0001] The invention relates to a method for alleviating pollution of a carbon fiber paper-polyethersulfone composite conductive separation membrane, in particular to a method for suppressing membrane pollution of a carbon fiber paper-polyethersulfone composite film in a cross-flow system by means of an auxiliary electric field, which belongs to the technical field of water treatment . Background technique [0002] In recent decades, the application of membrane technology in water treatment and other fields has received extensive attention. However, membrane fouling has been a ubiquitous problem since the birth of membrane treatment technology. According to the types of pollutants, membrane fouling can be divided into three categories: non-migrating membrane fouling, proliferative membrane fouling, and spreading membrane fouling. Non-migratory pollution refers to membrane fouling caused by natural organic substances such as protein, sodium alginate, humic a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/02
CPCB01D65/02B01D2321/22
Inventor 刘艳彪义超马春燕徐辉李方沈忱思杨波李墨华刘富强杨胜楠
Owner DONGHUA UNIV
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