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|Title:||Ethanol production with natural carbon sources in batch and continuousfermentation using free and immobilized Saccharomyces cerevisiae|
Najafpour, Ghasem D.
Rezaei, Pouya Sirous
|Keywords:||Ethanol production;Immobilized cells;Kinetic parameters;Molasses;Saccharomyces cerevisiae|
|Abstract:||This study presents ethanol production from molasses, dates and sugarcane syrup with sugar concentration of 35g/l in batch culture. Molasses (retention time, 24 h; initial sugar concentration, 100 g/l) gave highest yield of ethanol [conc., 45.5 g/l (theoreticalyield 89%)] in a packed bed reactor loaded with immobilized Saccharomyces cerevisiae beads (mean diam, 3 mm). After 16 h of cultivation, free cells were harvested for immobilization. Entrapment method was used to encapsulate free cells using 2.5%sodium alginate solution, solidified in calcium chloride bath. Growth kinetic model for S. cerevisiae in batch culture and rate model for performance of immobilized cell reactor (ICR) were determined.|
|ISSN:||0975-1084 (Online); 0022-4456 (Print)|
|Appears in Collections:||JSIR Vol.70(02) [February 2011]|
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