Document Type : Review Paper
Department of Environmental Health, Faculty of Health Sciences, MAHSA University, 42610 Jenjarom, Selangor, Malaysia.
Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia.
Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500
School of Mathematical Sciences, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500 Semenyih, Selangor Darul Ehsan, Malaysia.
Mechanical Engineering Department, De La Salle University, 2401 Taft Ave., Manila 0922, Philippines.
Center for Engineering and Sustainable Development Research, De La Salle University, 2401 Taft Ave., Manila 0922, Philippines.
Department of Chemical and Materials Engineering, College of Engineering, Tunghai University, Taichung 407, Taiwan.
Center for Nanotechnology, Tunghai University, Taichung 407, Taiwan.
Department Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan.
Lignocellulosic biomass has been recognized as promising feedstock for biofuels production. However, the high cost of pretreatment is one of the major challenges hindering large-scale production of biofuels from these abundant, indigenously-available, and economic feedstock. In addition to high capital and operation cost, high water consumption is also regarded as a challenge unfavorably affecting the pretreatment performance. In the present review, advances in lignocellulose pretreatment technologies for biofuels production are reviewed and critically discussed. Moreover, the challenges faced and future research needs are addressed especially in optimization of operating parameters and assessment of total cost of biofuel production from lignocellulose biomass at large scale by using different pretreatment methods. Such information would pave the way for industrial-scale lignocellulosic biofuels production. Overall, it is important to ensure that throughout lignocellulosic bioethanol production processes, favorable features such as maximal energy saving, waste recycling, wastewater recycling, recovery of materials, and biorefinery approach are considered.
- Recent advances on the pretreatment of lignocellulosic biomass are reviewed.
- Effects of pretreatment methods on lignocellulosic bioethanol production are critically compared.
- Challenges/perspectives of pretreatment technology for cellulosic biofuels are presented and discussed.