A Review on 1st and 2nd Generation Bioethanol Production-Recent Progress

Muktham, R, Bhargava, S, Bankupalli, S and Ball, A 2016, 'A Review on 1st and 2nd Generation Bioethanol Production-Recent Progress', Journal of Sustainable Bioenergy Systems, vol. 2016, no. 6, pp. 72-92.


Document type: Journal Article
Collection: Journal Articles

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Title A Review on 1st and 2nd Generation Bioethanol Production-Recent Progress
Author(s) Muktham, R
Bhargava, S
Bankupalli, S
Ball, A
Year 2016
Journal name Journal of Sustainable Bioenergy Systems
Volume number 2016
Issue number 6
Start page 72
End page 92
Total pages 21
Publisher Scientific Research Publishing
Abstract Today's society is based on the use of fossil resources for transportation fuels. The result of unlimited consumption of fossil fuels is a severe depletion of the natural reserves and damage to the environment. Depleting fossil reserves and increasing demand for energy together with environmental concerns have motivated researchers towards the development of alternative fuels which are eco-friendly, renewable and economical. Bioethanol is one such dominant global renewable transport biofuel which can readily substitute fossil fuels. Conventionally, bioethanol has been produced from sucrose and starch rich feedstocks (edible agricultural crops and products) known as 1st generation bioethanol; however this substrate conflicts with food and feed production. As an alternative to 1st generation bioethanol, currently there is much focus on advancing a cellulosic bioethanol concept that utilizes lignocellulosic residues from agricultural crops and residues (such as bagasse, straw, stover, stems, leaves and deoiled seed residues). Efficient conversion of lignocellulosic biomass into bioethanol remains an area of active research in terms of pretreatment of the biomass to fractionate its constituents (cellulose, hemicellulose and lignin), breakdown of cellulose and hemicellulose into hexose and pentose sugars and co-fermentation of the sugars to ethanol. The present review discusses research progress in bioethanol production from sucrose, starch and cellulosic feedstocks. Development of efficient technology to convert lignocellulosic biomass into fermentable sugars and optimization of enzymatic hydrolysis using on-site/ in-house enzyme preparation are the key areas of development in lignocellulosic bioethanol production. Moreover, finding efficient fermenting microorganisms which can utilize pentose and hexose sugars in their metabolism to produce ethanol together with minimum foam and glycerol formation is also an important parameter in fermentation. Research has been focusi
Subject Electrochemistry
Keyword(s) Bioethanol
Biomass
Cellulose
Fermentation
Hydrolysis
Pretreatment
DOI - identifier 10.4236/jsbs.2016.63008
Copyright notice Copyright © 2016 by authors and Scientific Research Publishing Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). http://creativecommons.org/licenses/by/4.0/
ISSN 2165-4018
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