Application of the Metal Membrane Filtration in the Pretreatment of 1,3-Propanediol Fermentation Broth

At the different concentration rate the change of quasi-steady filtrate flux,viscosity and wet solid content for 1,3-propanediol fermentation broth are investigated by metal membranes.On the basis of this,the mechanism of membrane fouling is pre-investigated and the method of membrane cleaning is obtained.It shows that 50 nm membrane is suited for membrane filtration of 1,3-propanediol fermentation broth.The recovery rate could improve to 95% by adding 35% of the deionized water,the concentration ratio of about 9.