Method and device for separating electric field-separation membrane coupling

A separation method and separation membrane technology, applied in separation methods, semi-permeable membrane separation, dispersed particle separation, etc., can solve problems such as the influence of electric field membrane separation selectivity and multi-channel separation process, etc., and achieve scale Chemical preparation, improved separation efficiency, and the effect of improving the separation factor

Inactive Publication Date: 2010-06-02
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

GB2315428A, USP5043048, USP4758320, USP4224135, etc. have made various improvements to the method of electric field enhanced membrane filtration process, all of which have achieved obvious strengthening effects, bu

Method used

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  • Method and device for separating electric field-separation membrane coupling
  • Method and device for separating electric field-separation membrane coupling
  • Method and device for separating electric field-separation membrane coupling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] use figure 1 The shown double channel plate type cross-flow filtration device is equipped with a flat sheet separation membrane 3 (effective membrane area is 45cm) in the middle of the plate type membrane module 2 ), the separation membrane is a PS polysulfone ultrafiltration membrane (Alfa Laval, Denmark) with a molecular weight cut-off (MWCO) of 50kDa, and metal titanium (ruthenium-plated) electrodes close to the membrane area are respectively arranged on both sides of the ultrafiltration membrane.

[0041] The bovine serum albumin (BSA) (Mb=69kDa, purity greater than 98%) solution of fixed volume (400mL) and concentration (0.5g / L) is transported in flow path 4 by feed pump, and the transmembrane pressure of filter membrane is 0.04MPa, the cross-flow velocity of the feed liquid flowing through the membrane surface is 0.03m / s, the pH value of the feed liquid is adjusted to about 8 with 1% sodium hydroxide solution; connect the electrodes to the positive and negative el...

Embodiment 2

[0044] The same apparatus and method as in Example 1 were used.

[0045] A solution of bovine serum albumin (BSA) (Mb=69kDa, purity greater than 98%) with a fixed volume (400mL) and a concentration of 1.0g / L is delivered to flow channel 4 through a feed pump, and the transmembrane pressure of the filter membrane is 0.04MPa , the cross-flow velocity of the feed liquid flowing through the membrane surface is 0.03m / s, and the pH value of the feed liquid is adjusted to about 8; the electrodes are connected to an external DC power supply, electrode 1 is the anode, electrode 2 is the cathode, and the electric field strength is adjusted to 30V / cm; the raw material liquid cross-flows through the membrane module and returns to the feed system for recycling; the permeate through the membrane enters the flow channel 5 and is continuously discharged and collected from the permeate outlet. When the permeate accumulates to 200mL , stop the operation, record the concentration time, and test ...

Embodiment 3

[0048] use figure 1 The shown double-channel plate type cross-flow filtration device is equipped with a flat sheet filter membrane 3 (effective membrane area is 45cm) in the middle of the plate type membrane module 2 ), filter membrane selection molecular weight cut off (MWCO) is the ceramic ultrafiltration membrane (U.S. Sterlitech company) of 50kDa, and the metal titanium (ruthenium plating) electrode similar to membrane area is respectively arranged on both sides of filter membrane.

[0049] The bovine serum albumin (BSA) (Mb=69kDa, purity greater than 98%) solution of fixed volume (400mL) and concentration (0.5g / L) is transported in flow path 4 by feed pump, and the transmembrane pressure of filter membrane is 0.06MPa, the cross-flow velocity of the feed liquid flowing through the membrane surface is 0.06m / s, the pH value of the feed liquid is adjusted to about 8 with 1% sodium hydroxide solution; connect the electrodes to the positive and negative electrodes of the extern...

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Abstract

The invention discloses a method and a device for separating electric field-separation membrane coupling, which are characterized in that: separation membranes with different natures are parallelly arranged, and the outmost sides are provided with electrodes so as to form a plurality of layers of runners formed between the separation membranes and between the separation membranes and the electrodes; and fluid to be separated flows through the runners in a staggered way, and a DC electric field is applied in the direction vertical to the runners, so that electriferous molecules or microparticles generate deviation or dialytic electrophoretic behavior under the condition of the electric field, and an aperture screening effect of the separation membranes is combined so as to realize the process of quick and high-efficiency separation. The process can be performed only under the driving of the electric field, and also can be performed under the driving of the electric field and pressure. Compared with the conventional membrane process and electrophoresis process, the method and the device can greatly improve concentration and separation efficiency, improve separation factors, realize the separation which cannot be realized by the conventional membrane process, obviously reduce membrane fouling and improve the service life of the membranes.

Description

technical field [0001] The invention relates to a method and a device for improving the flux and selectivity of the separation process by coupling an electric field with a separation membrane, thereby realizing fast and efficient separation. Background technique [0002] Membrane separation technology and electrophoresis technology are two commonly used separation methods. Membrane separation technology has been widely used in recent years due to its non-pollution, low energy consumption and high separation efficiency. During the membrane separation process, the solution to be treated is pushed by the pressure difference, the solvent and small molecular substances flow out through the membrane pores, and the suspended particles, colloid molecules and solute macromolecules are trapped in the main solution, so as to realize the separation of the target substance. Concentrate or separate. The main indicators to evaluate the membrane efficiency are the permeate flux of the mem...

Claims

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Application Information

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IPC IPC(8): B01D61/00B01D57/02B01D3/08B01D65/08
Inventor 万印华宋伟杰陈向荣苏仪沈飞
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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