Ethanol production by whole cell immobilization using lignocellulosic materials as solid matrix |
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| Affiliation: | 1. Irstea, UR OPAALE, 17 av. de Cucillé, CS 64427, F-35044 Rennes, France;2. Université Européenne de Bretagne, F-35044 Rennes, France;3. Département de génie civil et de génie des eaux, Université Laval, Québec, QC G1V 0A6, Canada;4. Centre de Recherche Industrielle du Québec (CRIQ), 333 rue Franquet, Québec, QC G1P 4C7, Canada;1. K.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya Str. 35, Moscow, 127276, Russia;2. Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, 142290, Russia;3. Department of Chemical and Materials Engineering, Tunghai University, Taiwan;4. Department of Chemical Engineering and Materials Science, Yuan Ze University, Taiwan;5. International Association for Hydrogen Energy, Miami, FL, USA;6. Graduate School of Science, Tokyo University of Science, Tokyo, 162-8601, Japan;7. Research Center for Smart Sustainable Circular Economy, Tunghai University, Taichung, Taiwan;8. Department of Chemical Engineering, National Cheng Kung University, Tainan, Taiwan |
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| Abstract: | Amongst four carriers used, rice-straw was found to be superior in terms of ethanol production. The maximum productivity (17.84 gl−1 h−1) corresponded to a dilution rate of 0.39 h−1, the ethanol concentration being 45.80 gl−1. A multistage rhomboidal bioreactor was found to partially overcome the disruption effect caused by the generation of a large volume of carbon dioxide in the column. Increases in productivity of about 12.55% and 3.6%, respectively, were achieved using rhomboidal and tapered bioreactors as compared to the cylindrical bioreactor. It was observed that the generation time of cells, in both the immobilized and free states, was around 2.5 h. The ethanol yield (Yp/s) in the lower part of the reactor was less in comparison with other zones, where the substrate utilization efficiency was relatively higher. |
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