Pretreatment of lignocellulosic biomass for enhanced biogas production |
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| Affiliation: | 1. College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China;2. Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China;1. Department of Chemical, Polymer & Composite Materials Engineering, University of Engineering & Technology, KSK Campus, Lahore, Pakistan;2. Center of Research in Ionic Liquids, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia;3. Department of Chemical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Perak, Malaysia;4. Department of Chemical Engineering, Government College University, Faisalabad, Pakistan;1. Department of Molecular Biosciences and Bioengineering (MBBE), University of Hawai’i at Mānoa, 1955 East-West Road, Agricultural Science Building 218, Honolulu, HI 96822, USA;2. University of Hohenheim, State Institute of Agricultural Engineering and Bioenergy, Garbenstrasse 9, Stuttgart 70599, Germany;1. Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, via Di Biasio 43, 03043, Cassino, FR, Italy;2. UNESCO-IHE, Westvest 7, 2611 AX, Delft, The Netherlands;3. Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, via Claudio 21, 80125, Naples, Italy |
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| Abstract: | Lignocellulosic biomass is an abundant organic material that can be used for sustainable production of bioenergy and biofuels such as biogas (about 50–75% CH4 and 25–50% CO2). Out of all bioconversion technologies for biofuel and bioenergy production, anaerobic digestion (AD) is a most cost-effective bioconversion technology that has been implemented worldwide for commercial production of electricity, heat, and compressed natural gas (CNG) from organic materials. However, the utilization of lignocellulosic biomass for biogas production via anaerobic digestion has not been widely adopted because the complicated structure of the plant cell wall makes it resistant to microbial attack. Pretreatment of recalcitrant lignocellulosic biomass is essential to achieve high biogas yield in the AD process. A number of different pretreatment techniques involving physical, chemical, and biological approaches have been investigated over the past few decades, but there is no report that systematically compares the performance of these pretreatment methods for application on lignocellulosic biomass for biogas production. This paper reviews the methods that have been studied for pretreatment of lignocellulosic biomass for conversion to biogas. It describes the AD process, structural and compositional properties of lignocellulosic biomass, and various pretreatment techniques, including the pretreatment process, parameters, performance, and advantages vs. drawbacks. This paper concludes with the current status and future research perspectives of pretreatment. |
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| Keywords: | Biogas Methane Anaerobic digestion Lignocellulosic biomass Pretreatment |
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