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- Title
On the Optimization of Fermentation Conditions for Enhanced Bioethanol Yields from Starchy Biowaste via Yeast Co-Cultures.
- Authors
Hashem, Mohamed; Alamri, Saad A.; Asseri, Tahani A. Y.; Mostafa, Yasser S.; Lyberatos, Gerasimos; Ntaikou, Ioanna
- Abstract
The present study aims to assess the impact of the type of yeast consortium used during bioethanol production from starchy biowastes and to determine the optimal fermentation conditions for enhanced bioethanol production. Three different yeast strains, Saccharomyces cerevisiae, Pichia barkeri, and Candida intermedia were used in mono- and co-cultures with pretreated waste-rice as substrate. The optimization of fermentation conditions i.e., fermentation time, temperature, pH, and inoculum size, was investigated in small-scale batch cultures and subsequently, the optimal conditions were applied for scaling-up and validation of the process in a 7-L fermenter. It was shown that co-culturing of yeasts either in couples or triples significantly enhanced the fermentation efficiency of the process, with ethanol yield reaching 167.80 ± 0.49 g/kg of biowaste during experiments in the fermenter.
- Publication
Sustainability (2071-1050), 2021, Vol 13, Issue 4, p1890
- ISSN
2071-1050
- Publication type
Article
- DOI
10.3390/su13041890