Journal
BIORESOURCE TECHNOLOGY
Volume 316, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2020.123899
Keywords
Clostridium beijerinckii YBS3; ABE fermentation; Puerariae slag; Ultrasound irradiation; Ultrasound-assisted dilute acid hydrolysis
Funding
- National Natural Science Foundation of China [21466014]
- Jiangxi Provincial Department of Education Scientific Research Project [GJJ160388]
- China scholarship council [201908360029]
- Training Program of Innovation and Entrepreneurship for Undergraduates from Jiangxi Agriculture University [202010410255]
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In this study, puerariae slag (PS) was evaluated as a renewable raw material for acetone-butanol-ethanol (ABE) fermentation. To accelerate the hydrolysis of PS, the method of ultrasound-assisted dilute acid hydrolysis (UAAH) was used. With this effort, 0.69 g reducing sugar was obtained from 1 g raw material under the optimal pretreatment condition. Subsequently, the butanol and total solvent production of 8.79 +/- 0.16 g/L and 12.32 +/- 0.26 g/L were obtained from the non-detoxified diluted hydrolysate, and the yield and productivity of butanol were 0.19 g/g and 0.12 g/L/h, respectively. Additionally, the changes in the structure of PS after different pretreatment methods were observed using SEM and FT-IR. UAAH resulted in more severe and distinct damage to the dense structure of PS. This study suggests that the UAAH is an attainable but effective pretreatment method, thereby is a promising technique for lignocellulose hydrolysis and improve butanol production.
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