Assessment via the modified gompertz-model reveals new insights concerning the effects of ionic liquids on biohydrogen production |
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Authors: | Nándor Nemestóthy Péter Bakonyi Tamás Rózsenberszki Gopalakrishnan Kumar László Koók Gábor Kelemen Sang-Hyoun Kim Katalin Bélafi-Bakó |
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Affiliation: | 1. Research Institute on Bioengineering, Membrane Technology and Energetics, University of Pannonia, Egyetem Ut 10, 8200 Veszprém, Hungary;2. Institute of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger, Box 8600 Forus, 4036 Stavanger, Norway;3. School of Civil and Environmental Engineering, Yonsei University, Seoul 38722, Republic of Korea |
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Abstract: | Lignocellulosic biofuel, in particular hydrogen gas production is governed by successful feedstock pretreatment, hydrolysis and fermentation. In these days, remarkable attention is paid to the use of ionic liquids to make the fermentable regions of lignocellulose biomass more accessible to the biocatalysts. Although these compounds have great potential for this purpose, their presence during the consecutive fermentation stage may pose a threat on process stability due to certain toxic effects. This, however, has not been specifically elaborated for dark fermentative biohydrogen generation. Hence, in this work, two common imidazolium-type ionic liquids (1-butyl-3-methylimidazolium acetate, (bmim]Ac]) and 1-butyl-3-methylimidazolium chloride, (bmim]Cl])) were employed in mixed culture biohydrogen fermentation to investigate the possible impacts related to their presence and concentrations. The batch assays were evaluated comparatively via the modified Gompertz-model based on the important parameters characterizing the process, namely the biohydrogen production potential, maximum biohydrogen production rate and lag-phase time. |
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Keywords: | Biohydrogen Ionic liquid Lignocellulose Inhibition Modified gompertz-model |
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