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Article – Journal of Natural Products and Resources

Journal of Natural Products and Resources, Volume 3,Issue 1,2017 Pages 104-110

Fuel Ethanol from Cane Molasses: A Review of Feedstocks, Technologies, Opportunities and Challenges
N.P. Patil*, V.S. Patil

In current scenario, Ethanol especially bioethanol (produced from biomass) has potential to substitute conventional energy sources like coal, gasoline etc. This study reviewed the literature on production of ethanol through the fermentation of molasses for its potential to replace petroleum fuels and different techniques available for the separation of ethanol from fermented wash. Metrics include: feedstocks, fermentation process, separation techniques and comparison of various techniques on the basis of their heat integration, energy consumption, cooling water requirement and pollution reduction pertaining to economics of the ethanol production. The key findings are that an agreement exists among the literature that multi pressure distillation is considerably good as compared to other techniques to warrant large-scale production but multi pressure distillation in combination with molecular dehydration is even better from the energy consumption point of view. When these findings are considered along with the marginal improvement in CO2 emissions and other pollutants, it appears that the techniques for the treatment of production waste are well developed. In summary, considering all the facts associated with the latest ethanol production technologies, it is found that still there is a large scope for the improvements. It is observed that the domain of energy and environmental impacts of the production technologies had so far been neglected.

Keywords: Saccharomyces cerevisiae; Multi-Pressure Distillation; Pervaporation; Heat Integration; Pressure Swing Adsorption; Vapor Recompression;