Enhanced saccharification of wheat straw with the application of ultrasonic-assisted quaternary ammonium hydroxide pretreatment |
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| Institution: | 1. Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China;2. Rural Environment Protection Engineering & Technology Center of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China;1. Chemical and Materials Engineering Department, 1664 N. Virginia St., MS 170, University of Nevada, Reno, NV 89557, USA;2. Civil and Environmental Engineering Department, 1664 N. Virginia St., University of Nevada, Reno, NV 89557, USA;1. Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, China;2. The BioComposites Centre, Bangor University, Bangor, UK;1. Key Laboratory of Systems Bioengineering (Ministry of Education), School of Chemical Engineering and Technology, Tianjin University, Weijin Road 92, Nankai District, Tianjin 300072, PR China;2. SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Weijin Road 92, Nankai District, Tianjin 300072, PR China;1. College of Information Science & Technology, Beijing University of Chemical Technology, Chaoyang District, Beijing, 100029, China;2. Intelligence and Information Engineering College, Tangshan University, Lubei District, Tangshan, 063000, China;3. College of Chemical Engineering, Beijing University of Chemical Technology, Chaoyang District, Beijing, 100029, China;1. Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, National Engineering Lab. for Biomass Chemical Utilization, Key Lab. of Biomass Energy and Material, Jiangsu Province, China;2. Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China |
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| Abstract: | Lignocelluloses featuring complicated structure and poor degradability usually require pretreatment before its utilization. In this study, an ultrasonic-assisted pretreatment by using quaternary ammonium hydroxide was introduced to enhance biodegradability of lignocellulosic biomass. The synergistic chemical and mechanical pretreatment were supposed to be responsible for both external surface destruction and internal structure disruption of lignocelluloses. High-efficient lignin removal accompanied with obvious structural (crystallinity) transformation was achieved in the pretreated straws. Process analysis indicated that factors of time, temperature, concentration of solvent, and ultrasound power intensity turned out to be significant for pretreatment, and a 4-fold increased saccharification yield of around 92.4% as compared to untreated straw was obtained from the wheat straw pretreated by 15% solvent at 50 °C for 0.5 h in power intensity 344 W/cm2. All results suggest that the combined chemical and mechanical treatment can significantly improve the bio-accessibility of lignocelluloses, leading to the enhanced utilization efficiency. |
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| Keywords: | Lignocelluloses Quaternary ammonium hydroxide Ultrasonic-assisted Pretreatment Bioconversion |
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