Membrane filtration is a novel method which concentrate and separate special material in stock solution. The main application is listed as below:

　　1.Concentration and purification of stock solution

　　The concentrated solution is the useful product. The retention concentrated solution can be reproduced into final products by following processing. Take the SiC powder production as a example, the waste water discharged from the production line contains a large amount of SiC powder which can be reclaimed and reproduced using this technique, thus greatly improved the yield rate and decrease the emission pollution.

　　2.Precipitation and separation of stock solution

　　The permeate is the useful and direct final product. Take the red wine or Chinese medicated wine as example, using this technique, the permeate wine is very clear and pure with taste greatly improved.