Title Ethanol production from lactose by immobilized reactor system using a fusant yeast strain of saccharomyces cerevisiae and kluyveromyces fragilis
Author Lee, Chun Hee · Bang, Jeong Hee · Nam, Doo Hyun
Address College of Pharmacy, Yeungnam University
Bibliography Korean Journal of Microbiology, 30(5),355-359, 1992
Key Words Fusant yeast, ethanol fermentation, whey fermentation, immobilized cell reactor
Abstract Yeast cells of a fusant strain constructed by protoplast fusion of Saccharomyces cerevisiae and Kluyveromyces frugilis were immobilized on calcium alginate beads. The increment of the ethanol tolerance of this strain to 8.0%, when compared with the parent K, fragilis, was confirmed. Based on the results from jar fermentation, a packed-bed reactor of theh immobilized yeast cells was operated. The optimal performance of the immobilized yeast reactor for ethanol production was achieved when supplying 10% lactose (suplemented 1.0% yeast extract) at a temperature of 30℃. The maximal ethanol productivity was obtained as 13.3 g/I/hr at a dilution rate of 0.76 hr^-1.
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