Based upon cell circulation and product recovery，a silicone rubber (PDMS) membrane bioreactor system was built，and ferment experiments for apple juice were carried out with this system. Acclimatizing cultures were conducted，and a preferential strain was isolated from three yeast microbes.Ferment and pervaporation coupling experiments at 25 ℃ showed that the inoculating strain in apple juice grew up to a cell concentration of 108/ml in initial 24 h，and the products extraction by pervaporation enhanced the microbial growth.After fermenting for 96 h，the utilizable saccharide in the broth decreased down to 4%. The permeate collection at the down stream of the membrane had an alcohol concentration up to 28%. The permeation flux penetrating the membrane was around 1000 g/（m2·h). Scale-up tests were done with a different module of larger membrane area.The PDMS membrane bioreactor system was a prospective technology for the production of apple brandy and non alcoholic beverage by fermentation of apple juice.
