Effective clarifying process of reconstituted apple juice using membrane filtration with filter-aid pretreatment

摘要: Abstract Filtration characteristics of apple juices pretreated with various filter-aids were studied to select an appropriate process for the clarification higher permeate flux and lower membrane fouling, production high quality juice. Bentonite 0.5% was superior filter-aid than 0.2% polyvinylpolypyrrolidone (PVPP), 0.1% activated carbon 10–14 mesh, enzyme mixture 0.03% pectinase 0.003% amyalse in reducing juice turbidity, although PVPP best tannin rejection. Permeate fluxes during filtration effectively increased by pretreatment, especially bentonite. From considering recovery drop time, ultrafiltration (MWCO 30,000) presumed be proper microfiltration (0.01 μm pore size). In change juice, bentonite pretreatment filtrations improved color without deteriorational changes pH, total acidity, contents sugar, organic acid Vitamin C, which are important index fruit Finally, optimal effective