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Materials 2018, 11(5), 802; https://doi.org/10.3390/ma11050802

Enhanced Enzymatic Hydrolysis of Rice Straw Pretreated by Oxidants Assisted with Photocatalysis Technology

1
School of Environmental Science and Engineering and Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 51006, China
2
Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan
3
College of Pharmacy, Kaohsiung Medical University, Kaohsiung 000807, Taiwan
*
Author to whom correspondence should be addressed.
Received: 2 April 2018 / Revised: 3 May 2018 / Accepted: 9 May 2018 / Published: 16 May 2018
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Abstract

This work evaluated the effectiveness of rice straw pretreatment using a TiO2/UV system in the presence of oxidants. The effects of TiO2 concentrations, pH and photocatalysis time were investigated. Inorganic oxidants including H2O2, K2S2O8, and KIO4 were added to further enhance the effect on enzymatic hydrolysis of rice straw. The TiO2/UV/ H2O2 pretreatment showed a higher amount of released reducing sugar (8.88 ± 0.10 mg/mL, compared to 5.47 ± 0.03 mg/mL in untreated sample). Composition analyses of rice straw after the TiO2/UV/H2O2 pretreatment showed partial lignin and hemicellulose removal. Moreover, structural features of untreated and pretreated rice straw were analyzed through FE-SEM, FT-IR, and XRD. This work suggests that H2O2 is an efficient addition for photocatalysis pretreatment of rice straw. View Full-Text
Keywords: photocatalysis; oxidants; pretreatment; enzymatic hydrolysis photocatalysis; oxidants; pretreatment; enzymatic hydrolysis
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Chang, K.-L.; Wang, X.-Q.; Han, Y.-J.; Deng, H.; Liu, J.-Y.; Lin, Y.-C. Enhanced Enzymatic Hydrolysis of Rice Straw Pretreated by Oxidants Assisted with Photocatalysis Technology. Materials 2018, 11, 802.

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