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Description: Second generation biofuels in general and bioethanol in particular are believed to reduce the global warming effect as well as adding co-benefit to agricultural and forestry sectors. Advanced bioethanol production via bio-chemical process includes four main steps which are pretreatment, acid/enzymatic hydrolysis (saccharification of lignocellulose), fermentation and distillation (ethanol recovery). Beside the feedstock and logistic costs, costs of pretreatment, saccharification and distillation are often various between methods and especially high in inefficient ones. Techno-economic analysis (TEA) should be carried out with each case to support the commercialization of advanced ethanol production. Life-cycle assessment (LCA) is a powerful tool for distinguishing and examining environmental impacts, energy consumption, and economic viability of various pathways for lignocellulosic ethanol as well as figuring out hot spots for future renovation. TEA along with LCA provide a comprehensive basis for making decisions. This review summarizes and compares the production cost and environmental impacts of ethanol production from different lignocellulosic materials by diverse bio-chemical conversion techniques as well as provides an information source for forthcoming studies correlating economic and environmental issues of bioenergy production.

Keywords: second generation, ethanol, techno-economic analysis, life-cycle assessment, production cost, environmental impacts
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Date: 2018-07-22
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Conference name: CSBE/SCGAB 2018 Annual Conference, School of Engineering, University of Guelph, Guelph, Ontario, July 22-25 2018.
Session name: Clean and Green Energy I

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Type: Text.Article
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Publication type: Technical conference
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Coverage: Canada
Language 1: en
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Rights: Canadian Society for Bioengineering
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