Improving enzymatic hydrolysis of brewer spent grain with nonthermal plasma.
Bioresour Technol
; 282: 520-524, 2019 Jun.
Article
em En
| MEDLINE
| ID: mdl-30902485
ABSTRACT
In this study, a new pre-treatment method based on novel non-thermal plasma technology was developed to improve the enzymatic hydrolysis of brewer's spent grain (BSG) and subsequent bioethanol production. A submerged dielectric barrier discharge plasma reactor system was applied for this purpose. Pre-treatments were performed by taking into account variables including; voltages (22â¯kV, 25â¯kV and 28â¯kV), solvent (acid, alkali and water) and time (5, 10, 15â¯min). The resulting treated biomass was subjected to enzymatic hydrolysis. A 2.14-fold increase in yield of the reducing sugar was achieved post hydrolysis when the biomass was treated in water for 10â¯min at a voltage setting of 28â¯kV (162.90â¯mg/g of BSG) compared to control (75.94â¯mg/g of BSG). This research suggests that subjecting lignocellulose to plasma discharges can enhance the efficiency of enzymatic hydrolysis. A high ethanol titre was also obtained upon fermentation of the hydrolysate (25.062â¯g/l).
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MEDLINE
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En
Ano de publicação:
2019
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Article