Continuous ethanol production from pineapple cannery waste using immobilized yeast cells.
The cells of Saccharomyces cerevisiae ATCC 24553, were immobilized in k-carrageenan and packed in a tapered glass column reactor for ethanol production from pineapple cannery waste at temperature 30 degrees C and pH 4.5. The maximum productivity was 42.8 g ethanol 1(-1) h(-1) at a dilution rate of 1.5 h(-1). The volumetric ethanol productivity of the immobilized cells was ca. 11.5 times higher than the free cells. The immobilized cell reactor was operated over a period of 87 days at a dilution rate of 1.0 h(-1), without any loss in the immobilized cell activity. The maximum specific ethanol productivity and specific sugar uptake rate of the immobilized cells were 1.2 g ethanol g(-1) dry wt. cell h(-1) and 2.6 g sugar g(-1) dry wt. cell h(-1), respectively, at a dilution rate of 1.5 h(-1).
Nigam
J N
JN
Biochemistry Division, Regional Research Laboratory, Jorhat 785 006, Assam, India. jnnbio@yahoo.com
D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation; D019649:Food Industry; D005638:Fruit; D007220:Industrial Waste; D007700:Kinetics; D012441:Saccharomyces cerevisiae / Q000378:metabolism*
D007220:Industrial Waste; D000431:Ethanol