Process intensification strategies for enhanced holocellulose solubilization

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2018-10-20
Major/Subject
Mcode
Degree programme
Language
en
Pages
11
937-947
Series
JOURNAL OF CLEANER PRODUCTION, Volume 199
Abstract
Biorefinery sector has become a serious dispute for cleaner and sustainable development in recent years. In the present study, pretreatment of pineapple peel waste was carried out in high pressure reactor using various pretreatment-enhancers. The type and concentration effect of each enhancer on hemicellulose solubilization was systematically investigated. The binary acid (phenol + sulfuric acid) at 180 °C was found to be superior amongst other studied enhancers, giving 81.17% (w/v) hemicellulose solubilization in liquid-fraction under optimized conditions. Solid residue thus obtained was subjected to enzymatic hydrolysis that resulted into 24.50% (w/v) cellulose breakdown. Treated solid residue was further characterized by scanning electron microscopy and fourier transform infrared spectroscopy to elucidate structural changes. The pooled fractions (acid treated and enzymatically hydrolyzed) were fermented using Clostridium acetobutylicum NRRL B 527 which resulted in butanol production of 5.18 g/L with yield of 0.13 g butanol/g sugar consumed. Therefore, pretreatment of pineapple peel waste evaluated in this study can be considered as milestone in utilization of low cost feedstock, for bioenergy production.
Description
Keywords
Biobutanol, Enzymatic hydrolysis, Hemicellulose solubilization, Pineapple peel, Steam explosion
Other note
Citation
Khedkar , M A , Nimbalkar , P R , Kamble , S P , Gaikwad , S G , Chavan , P V & Bankar , S B 2018 , ' Process intensification strategies for enhanced holocellulose solubilization : Beneficiation of pineapple peel waste for cleaner butanol production ' , Journal of Cleaner Production , vol. 199 , pp. 937-947 . https://doi.org/10.1016/j.jclepro.2018.07.205