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Ethanol Production from Acid Pretreated Food Waste Hydrolysate Using Saccharomyces cerevisiae 74D694 and Optimizing the Process Using Response Surface Methodology.
- Source :
- Waste & Biomass Valorization; Mar2019, Vol. 10 Issue 3, p701-708, 8p
- Publication Year :
- 2019
-
Abstract
- Ethanol production from acid pretreated food waste hydrolysate using immobilized Saccharomyces cerevisiae 74D694 was investigated under different conditions in a batch experiment. Ethanol yield was measured at different time intervals (38, 48, 72, 96 and 105 h) using different immobilized bead ratios (25:100, 30:100, 40:100, 50:100 and 54:100, w/v). Food waste was pretreated using dilute sulphuric acid and the hydrolysate was filtered. The dry food waste had an initial reducing sugar content of 46% (w/w). After dilute acid pretreatment, reducing sugar content increased to 62%. The present study utilized liquid hydrolysate for ethanol production. The process was optimized using central composite design (CCD) a statistical tool used for optimization in response surface methodology (RSM). RSM predicted a maximum ethanol yield of 0.044 g/g of soluble solid in liquid hydrolysate at 40 h fermentation time and immobilized bead ratio of 54:100 (w/v). An experiment was run at the optimal condition and an ethanol yield of 0.047 g/g of soluble solid in liquid hydrolysate was obtained. The predicted result was thus experimentally verified. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 18772641
- Volume :
- 10
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Waste & Biomass Valorization
- Publication Type :
- Academic Journal
- Accession number :
- 134584553
- Full Text :
- https://doi.org/10.1007/s12649-017-0077-9