Efficient conversion of cornstalk to bioethanol using dilute H 2 SO 4 pretreatment
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ORIGINAL RESEARCH
Efficient conversion of cornstalk to bioethanol using dilute H2SO4 pretreatment Farjana Jehadin1 · Taposhi Rabeya1 · Mohammad A. Asad1 · Olubunmi O. Ayodele2,3 · Abiodun E. Adekunle1,2 · Md Saiful Islam1 Received: 2 September 2020 / Accepted: 26 October 2020 © Islamic Azad University 2020
Abstract Fruit waste is an attractive lignocellulosic material for bioethanol production since it is one of the most abundant renewable resources Fruit waste is an attractive lignocellulosic material for bioethanol production since it is one of the most abundant renewable resources. Corn stalk (CS) is one of the most abundant agricultural residues containing high polysaccharides for low-cost bioethanol production. In this study, dilute acid along with intensified thermal pretreatment of CS and other parameters were optimized for higher yield of bioethanol. CS samples were pretreated using H 2SO4 concentrations of 0.5, 1.0, 1.5, 2.0, and 2.5% at 100 °C for 1 h reaction time. Optimal conditions of 2% acid-pretreated CS, 5% (w/v) of Saccharomyces cerevisiae addition and 48 h fermentation produced highest yield of bioethanol: 32.53 (g/L) which was 1.24-fold increase. Hemicellulose degradation of 75.68% was recorded in the 2% acid-treated substrate. Scanning electron microscope (SEM) images revealed induced porosity and surface area disruption of CS in the treated samples. Crystallinity of the treated samples increased as shown by X-ray diffraction (XRD) analysis. Low concentrated H 2SO4 coupled with thermal pretreatment could be a viable method of lignocellulosic biomass utilization for efficient bioethanol production.
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s40095-020-00366-w) contains supplementary material, which is available to authorized users. * Abiodun E. Adekunle [email protected] * Md Saiful Islam [email protected] 1
Institute of Fuel Research and Development, Bangladesh Council of Scientific and Industrial Research, Dhanmondi, Dhaka 1205, Bangladesh
2
Biotechnology Center, Forestry Research Institute of Nigeria, PMB 5054, Dugbe Ibadan, Nigeria
3
Nanoscience Department, The Joint School of Nanoscience and Nanoengineering, University of North Carolina, Chapel Hill, NC 27401, USA
13
Vol.:(0123456789)
International Journal of Energy and Environmental Engineering
Graphic abstract
Keywords Bioethanol · Acid pretreatment · Biofuel · Corn stalk · Fermentation
Introduction The industrial development occurring globally has created a surge in the demand for fossil fuels and its derivatives. This demand cuts across lots of sectors such as transportation, manufacturing and urban development, thus making energy demand a pressing issue in the twenty-first century [1]. Fuels from fossil sources are non-renewable energy and a source of environmental pollutants. Consequently, increasing their day by day utilization causes increase in the level of pollution and deteriorates public health. This makes it imperative to find alternat
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