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Ultrafiltration of grape juice by hollow fiber membranes

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dc.contributor.advisor Badenhop, Arthur F.
dc.creator Garcia-Quintero, Zeferino Heberto
dc.date.accessioned 2012-01-26T16:21:30Z
dc.date.available 2012-01-26T16:21:30Z
dc.date.copyright 1983-08-29
dc.date.issued 1983-08-29
dc.identifier.uri http://hdl.handle.net/1957/27042
dc.description Graduation date: 1984 en_US
dc.description.abstract The feasibility of using hollow fiber ultrafi1tration for clarification, stabilization and preservation of white grape juice was evaluated. Flux and process parameters of a hollow fiber membrane ultrafi1tration unit (Romicon pilot scale, model FXS-MXII), were studied using white Riesling grape juice. Optimum processing conditions were determined for different nominal membrane molecular weight cut-off values. The effect of cut-off value changes on viscosity, pectin retention, pH, sugar content, titratable acidity, haze reduction and color were evaluated. Optimum conditions for processing were nominal membrane molecular weight cut-off = 50,000, temperature = 50°C, inlet pressure = 1.75 Kg/cm², outlet pressure = 1.40 Kg/cm², permeate flux = 72.57 L/M²-H. Concentration polarization and fouling of the membrane increased with feed juice viscosity and were limiting factors in permeation rate. A 93% retention of pectins was achieved and haze reduction was in the range of 91-93%. Sugar content, pH, titratable acidity, and color were not affected for any of the nominal membrane molecular weight cut-off values. en_US
dc.language.iso en_US en_US
dc.subject.lcsh Grape juice en_US
dc.subject.lcsh Ultrafiltration en_US
dc.title Ultrafiltration of grape juice by hollow fiber membranes en_US
dc.type Thesis/Dissertation en_US
dc.degree.name Master of Science (M.S.) in Food Science and Technology en_US
dc.degree.level Master's en_US
dc.degree.discipline Agricultural Sciences en_US
dc.degree.grantor Oregon State University en_US
dc.description.digitization File scanned at 300 ppi (Monochrome) using Scamax Scan+ V. on a Scanmax 412CD by InoTec in PDF format. LuraDocument PDF Compressor V. used for pdf compression and textual OCR. en_US
dc.description.peerreview no en_us

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