Effects of hydrothermal treatment on enhancing enzymatic hydrolysis of rapeseed straw

Zhi-Wen Wang, Ming-Qiang Zhu, Ming-Fei Li, Qin Wei and Run-Cang Sun

Renewable Energy, 2019, vol. 134, issue C, 446-452

Abstract: Rapeseed straw is an annually renewable low-cost crop by-product, and it was submitted to hydrothermal treatment at temperatures ranging from 145 to 205 °C for various retention times (15–120 min). The enzymatic hydrolysis was conducted at a substrate concentration of 2% and an enzyme addition of 115 mg/g substrate. Results showed that increased pretreatment severity gradually degraded and removed hemicelluloses, and temperatures above 190 °C destroyed the crystalline structure of cellulose and led to partial delignification. The microstructure of the lignin was partially destroyed and particle-sized debris appeared on the surface of the cellulose fibres under the harsh treatment conditions. The glucose yield increased with an increase in severity and a higher saccharification ratio (95%) was achieved at a relatively low temperature (190 °C) and short retention time (15–30 min). These results suggest that hydrothermal treatment of rapeseed straw effectively dissolves hemicelluloses and remarkably enhances enzymatic hydrolysis efficiency.

Keywords: Rapeseed straw; Hydrothermal treatment; Enzymatic hydrolysis; Hemicelluloses (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:134:y:2019:i:c:p:446-452

DOI: 10.1016/j.renene.2018.11.019

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