dc.contributor.author	Kadhum, Haider Jawad
dc.contributor.author	Rajendran, Karthik
dc.contributor.author	Murthy, Ganti S.
dc.contributor.funder	U.S. Department of Agriculture	en
dc.date.accessioned	2018-11-28T11:51:45Z
dc.date.available	2018-11-28T11:51:45Z
dc.date.issued	2018-10-04
dc.date.updated	2018-11-28T11:25:06Z
dc.description.abstract	Surfactants have been demonstrated to be effective in increasing the cellulase enzyme efficacy and overall enzymatic hydrolysis efficiency. However, the impact of the surfactant addition on the economic viability and environmental impacts of the bioethanol process has not been well-investigated. The objective of this study was to determine the economic and the environmental impacts of using five surfactant types—polyethylene glycol (PEG) 3000, PEG4000, PEG6000, PEG8000, and Tween80—at various concentrations (8%, 5%, 2%, 1%, 0.75%, 0.5%, 0.25%, and 0% (w/w)) during enzymatic hydrolysis and fermentation of pretreated Banagrass. We used an integrated techno-economic and life cycle assesment to guide the selection of optimal surfactant concentration in the bioethanol process. A surfactant concentration of >2% negatively affects the profitability of ethanol, even when there is a statistically significant increase in glucose and ethanol titers. Based on the overall performance indicators for final ethanol, economic viability and environmental impacts, the addition of PEG6000 at 2% (w/w) were determined to be the optimal option. Glucose and ethanol concentrations of 119.2 ± 5.4 g/L and 55.0 ± 5.8 g/L, respectively, with an 81.5% cellulose conversion rate, were observed for 2% (w/w) PEG6000. Techno-economic and life cycle analysis indicated that 2% w/w PEG6000 addition resulted in ROI of 3.29% and had reduced the global warming potential by 6 g CO2/MJ ethanol produced.	en
dc.description.sponsorship	U.S. Department of Agriculture (Biomass Research and Development Initiative - Grant No. USDA-NIFA-9008-003540)	en
dc.description.status	Peer reviewed	en
dc.description.version	Accepted Version	en
dc.format.mimetype	application/pdf	en
dc.identifier.citation	Kadhum, H. J., Rajendran, K. and Murthy, G. S. (2018) 'Optimization of surfactant addition in cellulosic ethanol process using integrated techno-economic and life cycle assessment for bioprocess design', ACS Sustainable Chemistry and Engineering, 6(11), pp. 13687-13695. doi:10.1021/acssuschemeng.8b00387	en
dc.identifier.doi	10.1021/acssuschemeng.8b00387
dc.identifier.endpage	13695	en
dc.identifier.issn	2168-0485
dc.identifier.issued	11	en
dc.identifier.journaltitle	ACS Sustainable Chemistry and Engineering	en
dc.identifier.startpage	13687	en
dc.identifier.uri	https://hdl.handle.net/10468/7155
dc.identifier.volume	6	en
dc.language.iso	en	en
dc.publisher	American Chemical Society	en
dc.rights	© 2018, American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Sustainable Chemistry and Engineering after technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/abs/10.1021/acssuschemeng.8b00387	en
dc.subject	Biofuels	en
dc.subject	Fermentation	en
dc.subject	Hydrolysis	en
dc.subject	Life cycle assessments	en
dc.subject	Lignocellulose	en
dc.subject	Process design	en
dc.subject	Sustainable processes	en
dc.subject	Techno-economic analysis	en
dc.title	Optimization of surfactant addition in cellulosic ethanol process using integrated techno-economic and life cycle assessment for bioprocess design	en
dc.type	Article (peer-reviewed)	en

Optimization of surfactant addition in cellulosic ethanol process using integrated techno-economic and life cycle assessment for bioprocess design

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