Green Processing and Synthesis | |
Optimization of submerged fermentation conditions to overproduce bioethanol using two industrial and traditional Saccharomyces cerevisiae strains | |
article | |
Reza Shaghaghi-Moghaddam1  Hoda Jafarizadeh-Malmiri1  Parviz Mehdikhani2  Reza Alijanianzadeh3  Sepide Jalalian3  | |
[1] Faculty of Chemical Engineering, Sahand University of Technology;Agricultural Researches and Education Natural Resources Center;Research and Development Center, Bidestan Company | |
关键词: bioethanol production; inoculum density; optimization; response surface methodology; Saccharomyces cerevisiae; | |
DOI : 10.1515/gps-2018-0044 | |
来源: De Gruyter | |
【 摘 要 】
The present study focuses on the overproduction of bioethanol through submerged fermentation. In a batch-scale submerged bioreactor using a traditional and an industrial Saccharomyces cerevisiae (NCYC 4109 and SFO6) strains, the fermentation was accomplished. The effects of the substrate brix (20.50–24.00 °Bx) and inoculum percentage in the initial fermentation solution (15%–45%) as independent variables on bioethanol production (g/l) as the dependent variable were assessed using the response surface methodology. Using the obtained experimental values for the response variable based on experiments for the fermentation parameters, a general model (second-order) with high coefficient of determination values ( R 2 > 95%) was generated to predict the bioethanol concentrations that were obtained using both yeast strains. The obtained results indicated that the optimum fermentation conditions to overproduce bioethanol (56.14 g/l) using the SFO6 yeast were at the substrate brix and inoculum percentage values of 24.70 °Bx and 26.35%, respectively. However, a higher concentration of bioethanol (53.1 g/l) using the NCYC 4109 yeast strain was obtained at the substrate brix and inoculum percentage values of 24.68 °Bx and 40.07%, respectively.
【 授权许可】
CC BY
【 预 览 】
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RO202107200001544ZK.pdf | 401KB | download |