Impact of sulfuric acid pretreatment of durian peel on the production of fermentable sugar and ethanol |
| |
Institution: | 1. Biorefinery and Process Automation Engineering Centre (BPAEC), Department of Chemical and Process Engineering, The Sirindhorn International Thai-German Graduate School of Engineering, King Mongkut''s University of Technology North Bangkok, Bangkok, 10800, Thailand;2. Department of Chemical Engineering, Faculty of Engineering, King Mongkut''s University of Technology North Bangkok, Bangkok, 10800, Thailand |
| |
Abstract: | After harvesting season, large amounts of durian peels were produced and uselessly disposed of by combustion or landfilling leading to environmental pollution and human health hazards. Proper management of these wastes is necessary to reduce not only an environmental problem but also to create value-added products. Herein, we optimized sulfuric acid pretreatment to promote enzymatic saccharification of durian peels and convert fermentable sugars to bioethanol. Three pretreatment parameters were optimized based on Response Surface Methodology (RSM), including acid concentration (0.5%–3.5%), temperature (60–140 °C), and time (20–100 min). At optimal pretreatment condition using 2.75% H2SO4, at 127.14 °C for 74.13 min, 0.53 g/g-biomass of reducing sugars were produced, which is 1.88 folds higher than the untreated durian peel. The pretreatment liquor and biomass hydrolysate were analyzed by Gas Chromatograph-Mass spectrometer (GC-MS), and fermentation inhibitors, i.e. acetic acid, furfural, and furan methanol, were identified in those fractions. Due to pretreatment at the optimal condition, a higher yield of reducing sugar was observed, and the production of ethanol from the pretreated biomass was 5.70 g/L (equivalent to 87.43% of theoretical yields). These findings demonstrated the potential of using durian waste in the biorefinery concept to achieve a concept of the green economy. |
| |
Keywords: | Fermentation Furan derivatives Inhibitors Optimization Pretreated biomass Value-added chemical |
本文献已被 ScienceDirect 等数据库收录! |
|