Lignocellulosic Bioethanol Production from Grasses Pre-treated with Acid Mine Drainage: Modeling and Comparison of SHF and SSF

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dc.contributor.authorBurman, N.W.
dc.contributor.authorSheridan, C.M.
dc.contributor.authorHarding, K.G.
dc.date.accessioned2023-04-03T11:05:34Z
dc.date.available2023-04-03T11:05:34Z
dc.date.issued2019-09-01
dc.description.abstractAcid mine drainage (AMD) was used for the pre-treatment of indigenous South African grass (Eragrostis curvula), and compared to H2SO4 (1 wt%) pre-treatment. The optimal pre-treatment duration were investigated and found to be 1 day for H2SO4 and 3 days for AMD pre-treatment. The optimal biomass solid loadings were found to be 20 wt% for both pre-treatment methods. Additionally, enzymatic hydrolysis and fermentation to produce ethanol were investigated for both separate hydrolysis and fermentation (SHF) and simultaneous saccharification and fermentation (SSF). In both SHF and SSF, the H2SO4 pre-treatment obtained higher concentrations of glucose/ethanol compared to AMD pre-treatment. The concentration of glucose/ethanol obtained using AMD pre-treatment was 70–80% of that achieved using H2SO4 pre-treatment. Empirical equations modeling the glucose/ethanol concentration in all processes were determined using a least squares method. Concentrations predicted by the models were found to have a high correlation (r2 = 0.87–0.99) to concentrations determined experimentally
dc.description.librarianPM2023
dc.description.sponsorshipThis work is based on research supported in part by the National Research Foundation of South Africa (Grant Numbers: 111864). The support of the University of the Witwatersrand, Johannesburg is also acknowledged.
dc.facultyEngineering and the Built Environment
dc.identifier.citationBurman, N.W. , Sheridan, C.M. and Harding, K.G. 2019. Lignocellulosic Bioethanol Production from Grasses Pre-treated With Acid Mine Drainage: Modelling and Comparison of SHF and SSF. Bioresource Technology Reports 7, pp.1-8.
dc.identifier.issn2589-014X
dc.identifier.urihttps://hdl.handle.net/10539/34866
dc.language.isoen
dc.publisherElsevier
dc.rights© 2019 Elsevier B.V. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Bioresource Technology Reports. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Bioresource Technology Reports, vol. 7, article number 100299, 2019. doi : 10.1016/j.biteb.2019.100299
dc.schoolSchool of Chemical and Metallurgical Engineering
dc.titleLignocellulosic Bioethanol Production from Grasses Pre-treated with Acid Mine Drainage: Modeling and Comparison of SHF and SSF
dc.typeOther
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