Abstract
Bioethanol was produced from the three different agro-industrial biomass residues, i.e., sugarcane bagasse (SB), rice husk (RH) and corn cob (CC)) at 35°C, 120hr with 90g of each substrate. 2% H2SO4 was used for hydrolysis of the samples while 3g of yeast (saccharomyces cerevisiae) was used for fermentation. Simple distillation was used for the distillation of the fermented broth. The concentration of reducing sugar and ethanol, quantity of produced bioethanol as well as the physical properties (pH, density, viscosity and flash point) was investigated. SB has the highest concentration of reducing sugar and ethanol as well as the quantity of produced bioethanol. The pH of bioethanol generated from all the three substrates are within the bioethanol standard value while the density, viscosity and flash point were higher than bioethanol standards. It was concluded that both SB, RH and CC has the potential of bioethanol production in commercial quantity under well-chosen production conditions.
Highlights
The ever-increasing demands for energy due to rapid increase in global population, industrialization, and geopolitical factors have called for the search for alternative and carbon neutral sources of energy [5, 16]
The ethanol concentration and quantity of produced bioethanol is higher in sugarcane bagasse (SB) compared to rice husk (RH) and corn cob (CC)
The present study showed that sugarcane bagasse (SB), rice husk (RH) and corn cob (CC) are both potential substrates for bioethanol production
Summary
The ever-increasing demands for energy due to rapid increase in global population, industrialization, and geopolitical factors have called for the search for alternative and carbon neutral sources of energy [5, 16]. The widespread application of conventional energy resources has contributed to serious challenges, including global warming and climate change by releasing greenhouse gases (GHGs) like carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and chlorofluorocarbons [10]. These adverse impacts have overshadowed the previous justifications used, including increasing petroleum prices, finite nature of fossil fuels, and have encourage the government and non-government agencies to find environmentally friendly, renewable, and sustainable energy resources for transportation, heating, and electricity generation [14]. The importance of alternative energy source has become even more necessary due to the continuous depletion of limited fossil fuel stock and for a safe and better environment [7]
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