Organic waste conversion through anaerobic digestion: A critical insight into the metabolic pathways and microbial interactions |
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| Affiliation: | 1. Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen361021, China;2. Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agriculture Sciences, Beijing100081, China;3. Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby, DK-2800, Denmark;1. Biomass Energy and Environmental Engineering Research Center, Beijing University of Chemical Technology, 507 Zonghe Building, 15 North 3rd Ring East Road, Beijing 100029, China;2. College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China;3. Modern Agricultural Engineering Key Laboratory at Universities of Education Department of Xinjiang Uygur Autonomous Region, Tarim University, Xinjiang Uygur Autonomous Region, Alar 843300, China;4. Department of Environmental Engineering, University of Patras, Seferi 2, Agrinio 30100, Greece;5. Laboratory of Alternative Fuels and Environmental Catalysis, Department of Chemical Engineering, University of Western Macedonia, 50100, Greece;1. Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China;2. University of Chinese Academy of Science, Beijing 100049, China;3. Lianyijiyuan Environmental Protection Engineering Co. Ltd, Xiamen 361021, China;4. Winogradsky Institute of Microbiology, Research Center of Biotechnology, Russian Academy of Sciences, Moscow, Russia |
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| Abstract: | Anaerobic digestion is a promising method for energy recovery through conversion of organic waste to biogas and other industrial valuables. However, to tap the full potential of anaerobic digestion, deciphering the microbial metabolic pathway activities and their underlying bioenergetics is required. In addition, the behavior of organisms in consortia along with the analytical abilities to kinetically measure their metabolic interactions will allow rational optimization of the process. This review aims to explore the metabolic bottlenecks of the microbial communities adopting latest advances of profiling and 13C tracer-based analysis using state of the art analytical platforms (GC, GC-MS, LC-MS, NMR). The review summarizes the phases of anaerobic digestion, the role of microbial communities, key process parameters of significance, syntrophic microbial interactions and the bottlenecks that are critical for optimal bioenergetics and enhanced production of valuables. Considerations into the designing of efficient synthetic microbial communities as well as the latest advances in capturing their metabolic cross talk will be highlighted. The review further explores how the presence of additives and inhibiting factors affect the metabolic pathways. The critical insight into the reaction mechanism covered in this review may be helpful to optimize and upgrade the anaerobic digestion system. |
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| Keywords: | Anaerobic digestion Biogas Metabolic pathways Microbial communities Syntrophic relation |
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