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

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dc.contributor.author Kadhum, Haider Jawad
dc.contributor.author Rajendran, Karthik
dc.contributor.author Murthy, Ganti S.
dc.date.accessioned 2018-11-28T11:51:45Z
dc.date.available 2018-11-28T11:51:45Z
dc.date.issued 2018-10-04
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.volume 6 en
dc.identifier.issued 11 en
dc.identifier.startpage 13687 en
dc.identifier.endpage 13695 en
dc.identifier.issn 2168-0485
dc.identifier.uri http://hdl.handle.net/10468/7155
dc.identifier.doi 10.1021/acssuschemeng.8b00387
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.format.mimetype application/pdf 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
dc.internal.authorcontactother Karthik Rajendran, Eri, University College Cork, Cork, Ireland. +353-21-490-3000 Email: k.rajendran@ucc.ie en
dc.internal.availability Full text available en
dc.check.info Access to this article is restricted until 12 months after publication by request of the publisher. en
dc.check.date 2019-10-04
dc.date.updated 2018-11-28T11:25:06Z
dc.description.version Accepted Version en
dc.internal.rssid 463564235
dc.contributor.funder U.S. Department of Agriculture en
dc.description.status Peer reviewed en
dc.identifier.journaltitle ACS Sustainable Chemistry and Engineering en
dc.internal.copyrightchecked Yes en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress k.rajendran@ucc.ie en

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