Bioethanol production from sugarcane leaf waste: Effect of various optimized pretreatments and fermentation conditions on process kinetics
| Autor: | Preshanthan Moodley, Gueguim Kana Eb |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Chemistry
Microwave pretreatment lcsh:Biotechnology Gompertz function Kinetics Lignocellulosic bioethanol Sugarcane Pulp and paper industry Applied Microbiology and Biotechnology Unit operation Article Process scale Hydrolysate nervous system diseases stomatognathic diseases Fermentation kinetics stomatognathic system Biofuel lcsh:TP248.13-248.65 Process kinetics parasitic diseases mental disorders Inorganic salt pretreatment Fermentation Biotechnology |
| Zdroj: | Biotechnology Reports, Vol 22, Iss, Pp-(2019) Biotechnology Reports |
| ISSN: | 2215-017X |
| DOI: | 10.1016/j.btre.2019.e00329 |
| Popis: | Highlights • Bioethanol kinetics was investigated under SSA-F, SSA-U, MSA-F and MSA-U conditions. • Monod, logistic and modified Gompertz models gave R2 > 0.97. • SSA-U pretreated SLW produced 25% more bioethanol than MSA-U. • No difference was observed between filtered and unfiltered enzymatic hydrolysate. • SLW residue showed a suitable protein and fat content for animal feed. This study examines the kinetics of S. cerevisiae BY4743 growth and bioethanol production from sugarcane leaf waste (SLW), utilizing two different optimized pretreatment regimes; under two fermentation modes: steam salt-alkali filtered enzymatic hydrolysate (SSA-F), steam salt-alkali unfiltered (SSA-U), microwave salt-alkali filtered (MSA-F) and microwave salt-alkali unfiltered (MSA-U). The kinetic coefficients were determined by fitting the Monod, modified Gompertz and logistic models to the experimental data with high coefficients of determination R2 > 0.97. A maximum specific growth rate (μmax) of 0.153 h−1 was obtained under SSA-F and SSA-U whereas, 0.150 h−1 was observed with MSA-F and MSA-U. SSA-U gave a potential maximum bioethanol concentration (Pm) of 31.06 g/L compared to 30.49, 23.26 and 21.79 g/L for SSA-F, MSA-F and MSA-U respectively. An insignificant difference was observed in the μmax and Pm for the filtered and unfiltered enzymatic hydrolysate for both SSA and MSA pretreatments, thus potentially reducing a unit operation. These findings provide significant insights for process scale up. |
| Databáze: | OpenAIRE |
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