Biorefining of rice straw by sequential fermentation and anaerobic digestion for bioethanol and/or biomethane production: Comparison of structural properties and energy output.
作者： Mahdy Elsayed , Abd El-Fatah Abomohra , Ping Ai , Dianlong Wang , Hamed M. El-Mashad
DOI: 10.1016/J.BIORTECH.2018.07.130
关键词: Fermentation 、 Biofuel 、 Biogas 、 Biorefining 、 Chemistry 、 Bioenergy 、 Pulp and paper industry 、 Anaerobic digestion 、 Straw 、 Enzymatic hydrolysis
摘要: Abstract Three routes; namely R1 representing direct anaerobic digestion (AD), R2 enzymatic hydrolysis followed by fermentation, distillation, then AD, and R3 AD of fermentation broth without distillation; alkali pretreated rice straw were investigated. Results showed that sequential effectively enhanced fibers degradation with significant changes in the composition. Fermentation through resulted ethanol yield 87.4 g kg−1 dry straw. Maximum biogas yields 286.9, 233.3 372.4 L kg−1 VS recorded for R1, after reaching steady state at 36, 24 33 days, respectively. However, produced highest biomethane content (79.3%) which represented 15 8% higher than R2, Therefore, bioenergy output energy conversion efficiency 10.58 GJ ton−1 75.6%, respectively, obtained demonstrating positive effect prior to AD.
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