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

Author(s)

Hilares, Ruly Teran ^[1] ; Kamoei, Douglas Viana ^[1] ; Ahmed, Muhammad Ajaz ^[2] ; da Silva, Silvio Silverio ^[1] ; Han, Jong-In ^[2] ; dos Santos, Julio Cesar ^[1]

Affiliation

^[1] Univ Sao Paulo, Engn Sch Lorena, Dept Biotechnol, BR-12602810 Sao Paulo - Brazil

^[2] Korea Adv Inst Sci & Technol, Dept Civil & Environm Engn, 373-1 Guseong Dong, Daejeon 305701 - South Korea

• Document type: Journal article
• Source: ULTRASONICS SONOCHEMISTRY; v. 43, p. 219-226, MAY 2018.
• Web of Science Citations: 9

Abstract

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. (AU)

• FAPESP's process: 16/23758-4 - Production of ethanol and pullulan assisted by unconventional methods in sugarcane bagasse biorefineries: hydrodynamic cavitation reactors and use of visible light with different wavelengths
• Grantee: Júlio César dos Santos
• Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants