Concentration of aqueous solutions of organic components by reverse osmosis: II. Influence of transmembrane pressure and membrane type on concentration of different alcohol solutions by reverse osmosis

摘要: Abstract Aroma compounds are heat-sensitive and volatile components, which lost with co-vapour during concentration by evaporation. The application of reverse osmosis for alcohol solutions, that components apple juice aroma, was investigated. Influence membrane type, processing pressure parameters volume different alcohols (0.1% v/v, 1% 2% v/v) studied. effect the molecular structure mass on model solutions osmosis, influence activity coefficient were also investigation carried out (methanol, ethanol, n -propanol, isopropanol, -butanol, isobutanol, -pentanol, isopentanol). Reverse laboratory equipment plates frames using two types composite membranes. In defined time intervals, process, samples permeates retentates taken. compounds—alcohols in permeate retentate determined gas chromatography a detector (GC/MS) “head space” technique. results this research give deeper insight into mechanisms retention aroma water osmosis. Examined could be concentrated successfully Membrane type HR 98 PP showed greater lower permeability. Higher factor recovery permeate, achieved bigger portion feed solution, iso-forms. selectivity increased increase than permeate.