Hydrogen and methane production potential of agave bagasse enzymatic hydrolysates and comparative technoeconomic feasibility implications |
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| Affiliation: | 1. División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica A.C., Camino a la Presa San José No. 2055, Col. Lomas 4a Sección, C.P. 78216, San Luis Potosí, SLP, Mexico;2. Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Av. Dr. Manuel Nava No. 6, Zona Universitaria, C.P. 78210, San Luis Potosí, SLP, Mexico;1. Chemical Engineering Program, Texas A and M University at Qatar, P.O. Box 23874, Doha, Qatar;2. Artie McFerrin Department of Chemical Engineering, Texas A and M University, MS 3122, College Station, TX, 77843-3122, United States;3. Catalysis Institute and c*change (DST-NRF Centre for Excellence in Catalysis), Department of Chemical Engineering, University of Cape Town, Cape Town, South Africa;4. Department of Chemical Engineering, Aristotle University of Thessaloniki, University Campus, 54124, Thessaloniki, Greece;5. Chemical Process & Energy Resources Institute (CPERI), Centre for Research and Technology Hellas (CERTH), 6th km Charilaou - Thermi Road, P.O. Box 361, 57001, Thessaloniki, Greece;1. School of Physics, University of Electronic Science and Technology, Chengdu, 611731, PR China;2. National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, and Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin, 150080, PR China |
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| Abstract: | In the present work, agave bagasse enzymatic hydrolysates obtained with newly locally-available commercial enzymatic preparations were explored for their corresponding hydrogen and methane production potential in batch mode. The major levels in chemical oxygen demand and total carbohydrates were provided by enzymatic hydrolysates made with Zymapect and Stonezyme, respectively. Batch experiments demonstrated that Celluclast 1.5L achieves the maximum hydrogen productivity (1.88 L H2/L), from 1.6 to 2.0-fold higher than other alternatives, whereas Zymapect attains the highest methane productivity (1.32 L CH4/L), with high specific yield reached by both Stonezyme and Zymapect (162 and 163 L CH4/kg bagasse), from 1.7 to 2.0-fold higher than other options. Finally, a preliminary techno-economic analysis allowed to elucidate that the cheapest alternatives for hydrogen and methane production at batch scale are Celluclast 1.5L and Stonezyme, respectively. Overall, the present analysis could serve as groundwork for the selection of the best enzymatic alternatives for hydrogen and methane production. |
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| Keywords: | Agave bagasse Enzymatic hydrolysis Dark fermentation Anaerobic digestion Hydrogen Methane |
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