期刊
ULTRASONICS SONOCHEMISTRY
卷 28, 期 -, 页码 207-217出版社
ELSEVIER
DOI: 10.1016/j.ultsonch.2015.07.006
关键词
Sugarcane bagasse; Ultrasound; Metal salt; Holocellulose recovery; Delignification; Bioethanol
资金
- Council of Scientific and Industrial Research (CSIR), New Delhi, India [22(0564)/12/EMR-II]
- CSIR, New Delhi
This study presents the ultrasound assisted pretreatment of sugarcane bagasse (SCB) using metal salt with hydrogen peroxide for bioethanol production. Among the different metal salts used, maximum holo-cellulose recovery and delignification were achieved with ultrasound assisted titanium dioxide (TiO2) pretreatment (DATE) system. At optimum conditions (1% H2O2, 4 g SCB dosage, 60 min sonication time, 2:100 M ratio of metal salt and H2O2, 75 degrees C, 50% ultrasound amplitude and 70% ultrasound duty cycle), 94.98 +/- 1.11% holocellulose recovery and 78.72 +/- 0.86% delignification were observed. The pretreated SCB was subjected to dilute acid hydrolysis using 0.25% H2SO4 and maximum xylose, glucose and arabinose concentration obtained were 10.94 +/- 0.35 g/L, 14.86 +/- 0.12 g/L and 2.52 +/- 0.27 g/L, respectively. The inhibitors production was found to be very less (0.93 0.11 g/L furfural and 0.76 +/- 0.62 g/L acetic acid) and the maximum theoretical yield of glucose and hemicellulose conversion attained were 85.8% and 77%, respectively. The fermentation was carried out using Saccharomyces cerevisiae and at the end of 72 h, 0.468 g bioethanol/g holocellulose was achieved. Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) analysis of pretreated SCB was made and its morphology was studied using scanning electron microscopy (SEM). The compounds formed during the pretreatment were identified using gas chromatography-mass spectrometry (GC-MS) analysis. (C) 2015 Elsevier B.V. All rights reserved.
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