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Microbial fingerprints of methanation in a hybrid electric-biological anaerobic digestion

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisReviewForskningpeer review

  • Bo Wang
  • Wenzong Liu, Harbin Institute of Technology
  • ,
  • Bin Liang, Harbin Institute of Technology
  • ,
  • Jiandong Jiang, Nanjing Agricultural University
  • ,
  • Aijie Wang, Harbin Institute of Technology, CAS - Research Center for Eco-Environmental Sciences

Biomethane as a sustainable, alternative, and carbon-neutral renewable energy source to fossil fuels is highly needed to alleviate the global energy crisis and climate change. The conventional anaerobic digestion (AD) process for biomethane production from waste(water) streams has been widely employed while struggling with a low production rate, low biogas qualities, and frequent instability. The electric-biologically hybrid microbial electrochemical anaerobic digestion system (MEC-AD) prospects more stable and robust biomethane generation, which facilitates complex organic substrates degradation and mediates functional microbial populations by giving a small input power (commonly voltages < 1.0 V), mainly enhancing the communication between electroactive microorganisms and (electro)methanogens. Despite numerous bioreactor tests and studies that have been conducted, based on the MEC-AD systems, the integrated microbial fingerprints, and cooperation, accelerating substrate degradation, and biomethane production, have not been fully summarized. Herein, we present a comprehensive review of this novel developing biotechnology, beginning with the principles of MEC-AD. First, we examine the fundamentals, configurations, classifications, and influential factors of the whole system's performances (reactor types, applied voltages, temperatures, conductive materials, etc.,). Second, extracellular electron transfer either between diverse microbes or between microbes and electrodes for enhanced biomethane production are analyzed. Third, we further conclude (electro)methanogenesis, and microbial interactions, and construct ecological networks of microbial consortia in MEC-AD. Finally, future development and perspectives on MEC-AD for biomethane production are proposed.

OriginalsprogEngelsk
Artikelnummer119270
TidsskriftWater Research
Vol/bind226
ISSN0043-1354
DOI
StatusUdgivet - nov. 2022

Bibliografisk note

Funding Information:
The authors would like to thank Dr. Cristiano Varrone, from the Department of Chemistry and Bioscience, Aalborg University, Dr. Yifeng Zhang, from the Department of Environmental and Resource Engineering, Technical University of Denmark, and Prof. Dr. Andreas Schramm and Dr. Marie Braad Lund, from the Department of Biology, Aarhus University, for valuable comments on the manuscript. The authors would also like to acknowledge financial support from the China Scholarship Council (No. 202004910351 ), and State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (No. 2022TS26). This research was financially supported by the Natural Science Foundation of Guangdong Province for Distinguished Young Scientists (No. 2021B1515020084 ), National Natural Science Foundation of China NSFC-ISF Joint Program (No. 41961144024 ), Shenzhen Science and Technology Innovation Program (No. KQTD20190929172630447), and Danish National Research Foundation (No. DNRF136 ).

Funding Information:
The authors would like to thank Dr. Cristiano Varrone, from the Department of Chemistry and Bioscience, Aalborg University, Dr. Yifeng Zhang, from the Department of Environmental and Resource Engineering, Technical University of Denmark, and Prof. Dr. Andreas Schramm and Dr. Marie Braad Lund, from the Department of Biology, Aarhus University, for valuable comments on the manuscript. The authors would also like to acknowledge financial support from the China Scholarship Council (No. 202004910351), and State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (No. 2022TS26). This research was financially supported by the Natural Science Foundation of Guangdong Province for Distinguished Young Scientists (No.2021B1515020084), National Natural Science Foundation of China NSFC-ISF Joint Program (No. 41961144024), Shenzhen Science and Technology Innovation Program (No. KQTD20190929172630447), and Danish National Research Foundation (No. DNRF136).

Publisher Copyright:
© 2022

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