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Optimising separation process of protein and polysaccharide from spent brewer’s yeast by ultrafiltration
Author(s) -
Huang Kai,
Gao Junyong,
Ma Sen,
Lu Jiajiong
Publication year - 2012
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/j.1365-2621.2012.02967.x
Subject(s) - ultrafiltration (renal) , polysaccharide , chromatography , chemistry , trehalose , yield (engineering) , response surface methodology , yeast , sucrose , food science , biochemistry , materials science , metallurgy
Summary The aim of this study was to optimise the ultrafiltration process for the separation of polysaccharide and protein from spent brewer’s yeast. Influence of concentration (1.5–4.5%), pH (4.0–8.0) and operating pressure (10–20 psi) on the yield of protein and polysaccharide was assessed using response surface methodology. The optimum separation conditions were found to be concentration 2.7%, pH 5.0 and operation pressure 14.0 psi. Under these conditions, the experimental yields of protein and polysaccharide were 95.03% and 94.65%, respectively, which were agreed closely to the predicted value. The polysaccharide was composed of glucose, sucrose and trehalose in a ratio of 1.12:0.83:2.36. The results indicated that ultrafiltration technology could be an effective and advisable technique for the separation of protein and polysaccharide.