An Evaluation Of Fermentation Approaches For Ethanol Production From Enzymatically Pretreated Sugarcane Tops | 92381
Journal of Fundamentals of Renewable Energy and Applications
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Second generation bioethanol has been advocated as a promising substitute of petroleum based fuels for mitigating GHG
emissions and lessening our dependency on fossil based fuels. Bioethanol has emerged as one of the advantageous sustainable
biofuel that aids in being an effective factor in the transportation sector for reducing emission of pollutants from tailpipe that
are the reason for smog and ground-level ozone. Bioethanol due to its high octane number of 108 has high anti-knock value
and can be used in bioethanol-diesel blend to decrease exhaust gas emission. In addition, bioethanol is less noxious producing
less air-borne pollutants in comparison to petroleum fuel. Typical process for the biological conversion of carbohydrates
to ethanol comprises of pretreatment, saccharification and fermentation. Development in fermentation technology plays a
significant role in making the process viable. Fermentation being a key element in the bioethanol production process, the
present study investigates different strategies viz. separate hydrolysis and fermentation (SHF), simultaneous saccharification
and fermentation (SSF) and semi-simultaneous saccharification and fermentation (SSSF) to produce ethanol from sugarcane
tops enzymatically pretreated with laccase. Sugarcane tops, an agricultural residue was used as the substrate since it is rich
in carbohydrates that are usually burnt in the field or used as low quality roughage. The focus of the study was to check the
efficiency of various approaches among which SSF and SSSF were able to enhance ethanol titre in the range of 6-7 % (v/v) with
shortened biological processing time (24-36 h).
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Knawang Chhunji Sherpa is currently pursuing her PhD at PK Sinha Centre for Bioenergy at the Indian Institute of Technology, Kharagpur, India. Her research work is focused on second generation bioethanol using sugarcane tops as lignocellulosic biomass.