Studies on Bioethanol Production from Fruit Waste using Saccharomyces cerevisiae

摘要

There is urgent need to resort an alternative energy sources because of rapid exhaustion of fossil fuel. Biofuelis analternative to petroleum-based fuel. The continuous utilization of fossil fuels witness the depletion of oil-reserve, which in turnincreases the price of Petroleum products. Hence the demand of an alternate fuel is in the fore-front. Biofuel or bioethanolresolves this critical problem. Among the liquid fuels, ethanol is used as an alternative to petroleumby blending with petrol withvarious proportion. It has beenearlier reported that the use of 85% ethanol and 15% gasoline reduced the emission ofgreenhouses around38% compared to fossil fuel. Another problem has been arisen because of open dumping of waste whichwould give malignant to the nature habitat at surrounding area of dumping sites.To reach the future demand of ethanol and forproper management of waste, it should be produced in high quantity from wastes. Thus, we are interested in production ofethanol from fruit waste (as substrate) and optimizing the parameters for higher yields of ethanol. The various pretreatmentmethods viz., the acid hydrolysis, alkali hydrolysis, and steaming resulted in the significant release of fermentable sugars fromthe Fruit waste. Saccharomycescerevisiaehas emerged as a potential organism for ethanol production. The present investigationwas undertaken to optimize the fermentation parameters and finally to study the ethanol production from the hydrolysate of fruitwaste. The maximum ethanol production (17.37 g/L) was obtained at a substrate concentration of 5.8% (v/v) at pH 6.5. We arein the process of enhancement of ethanol production by optimising different parameter.