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Published on: March 6, 2017
Scale-up of hydrothermal processing: Liquid hot water and pilot-scale tubular steam explosion batch reactor for
K D González-Gloria1, Rosa M Rodríguez-Jasso1, Gilver Rosero-Chasoy1
1Biorefinery Group, Food Research Department, School of Chemistry, Autonomous University of Coahuila, Saltillo, 25280, Coahuila, Mexico.
Abstract:
Sargassum spp. is a biomass that can potentially use as an alternative for bioethanol production. Hydrothermal processes (liquid hot water and steam explosion pretreatment) were carried out at different operational conditions. Enzymatic hydrolysis performed a preliminary test with different ratios 1:1 and 1:2 (cellulases and hemicellulases) of enzyme loading, once selected 1:2 ratio was obtained conversion yield of 99.91% and therefore carried a scale-up in stirred bioreactor getting 95.92% saccharification yield. Pre-simultaneous saccharification and fermentation strategy was performed in a continuous stirred tank bioreactor (CSTBR), producing ethanol yield of 57.69%, and for simultaneous saccharification and fermentation strategy was performed in a bubble column reactor was 71.37% ethanol yield. The energy efficiency was analyzed in different scenarios; the best data was 30.19 (gsugar/MJ) in the bioreactor enzymatic hydrolysis process. This development allows for establishing the conditions for a third-generation biorefinery on a circular bioeconomy using Sargassum biomass.
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