A new approach for bioethanol production from sugarcane bagasse using hydrodynamic cavitation assisted-pretreatment and column reactors

• Autores: Terán Hilares, Ruly, Kamoei, Douglas Viana, Ahmed, Muhammad Ajaz, da Silva, Silvio Silvério, Han, Jong-In, Santos, Júlio César Dos
• Formato: artículo
• Fecha de Publicación: 2018
• Institución: Consejo Nacional de Ciencia Tecnología e Innovación
• Repositorio: CONCYTEC-Institucional
• Lenguaje: inglés
• OAI Identifier: oai:repositorio.concytec.gob.pe:20.500.12390/442
• Enlace del recurso: https://hdl.handle.net/20.500.12390/442; https://doi.org/10.1016/j.ultsonch.2018.01.016
• Nivel de acceso: acceso abierto
• Materia: Sugarcane bagasse; Alkaline pretreatment; Ethanol production; Hydrodynamic cavitation; Hydrogen peroxide; Process intensification; http://purl.org/pe-repo/ocde/ford#1.04.01

Hydrodynamic cavitation (HC) was adopted to assist alkaline-hydrogen peroxide pretreatment of sugarcane bagasse (SCB). In the following condition: 0.29 M of NaOH, 0.78% (v/v) of H2O2, 9.95 min of process time and 3 bar of inlet pressure, 95.4% of digestibility of cellulosic fraction was achieved. To take the best use of the pretreated biomass, the overall process was intensified by way of employing a packed bed flow-through column reactor and thus enabling to handle a high solid loading of 20%, thereby leading to cellulose and hemicellulose conversions to 74.7% and 75%, respectively. In the fermentation step, a bubble column reactor was introduced to maximize ethanol production from the pretreated SCB by Scheffersomyces stipitis NRRL-Y7124, resulting in 31.50 g/L of ethanol, 0.49 g/g of ethanol yield and 0.68 g/L.h of productivity. All this showed that our HC-assisted NaOH-H2O2 pretreatment strategy along with the process intensification approach might offer an option for SCB-based biorefineries.