Optimizing Fermentation of Bioethanol with Saccharomyces cerevisiae Yeast

(De Gruyter) – Bioethanol and biodiesel have been championed as sustainable sources of energy in replacing fossile fuels. Biofuels can be produced from agricultural products and wastes. Bioethanol shows particular promise as it possesses lower emissions of volatile organic compounds and higher specific energy and heat of vaporization than fossil fuels.

Unfortunatley, current production techniques have displayed relativley low productivity with the fermentation step of the agricultural waste requiring a vast increase in efficiency to be commercially viable. Fermentation is dependent on the type of microorganism strain, the type and volume of the bioreactors, the type and composition of culture media and proper nutrients, and the pH and temperature of the fermentation media.

The authors modeled bioethanol production to study the overproduction of bioethanol via submerged fermentation using Saccharomyces cerevisiae (NCYC 4109 and SFO6) yeast strains. Using the values of their experiments the authors generated a general model (second-order) with high coefficient of determination values (R2 > 95%) to predict bioethanol concentrations obtained using both yeast strains.

It was concluded that an effective method to predict, model, and optimize bioethanol production by manipulating the process variables was achieved. The influence of the interaction of the substrate and the inoculum percentage on bioethanol production was remarkable.

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Edited for Content and Length by Dr. Matthew A. Hood.

The  full article can be found at De Gruyter in the journal of Green Processing and Synthesis.

DOI: 10.1515/gps-2018-0044

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