Linking performance to dynamic migration of biofilm ecosystem reveals the role of voltage in the start-up of hybrid microbial electrolysis cell-anaerobic digestion

Xue Ting Wang; Lei Zhao; Quan Zhang; Bo Wang; Defeng Xing; Jun Nan; Nan Qi Ren; Duu Jong Lee; Chuan Chen

doi:10.1016/j.biortech.2024.131242

Linking performance to dynamic migration of biofilm ecosystem reveals the role of voltage in the start-up of hybrid microbial electrolysis cell-anaerobic digestion

Xue Ting Wang, Lei Zhao, Quan Zhang, Bo Wang, Defeng Xing, Jun Nan, Nan Qi Ren, Duu Jong Lee, Chuan Chen^*

^*Corresponding author for this work

Department of Biology - Center for Electromicrobiology

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

1 Citation (Scopus)

Abstract

Applied voltage is a crucial parameter in hybrid microbial electrolysis cells-anaerobic digestion (MEC-AD) systems for enhancing methane production from waste activated sludge (WAS). This study explored the impact of applied voltage on the initial biofilm formation on electrodes during the MEC-AD startup using raw WAS (Rr) and heat-pretreated WAS (Rh). The findings indicated that the maximum methane productivity for Rr and Rh were 3.4 ± 0.5 and 3.4 ± 0.2 mL/gVSS/d, respectively, increasing 1.5 times and 2.6 times over the productivity at 0 V. The biomass on electrode biofilms for Rr and Rh at 0.8 V increased by 70 % and 100 % compared to 0 V. The core functional microorganisms in the cathode biofilm were Methanobacterium and Syntrophomonas, and Geobacter in the anode biofilm, enhancing methane production through syntrophism and direct interspecies electron transfer, respectively. These results offer academic insights into optimizing AD functional electrode biofilms by applying voltage.

Original language	English
Article number	131242
Journal	Bioresource Technology
Volume	411
ISSN	0960-8524
DOIs	https://doi.org/10.1016/j.biortech.2024.131242
Publication status	Published - Nov 2024

Keywords

Applied voltage
Electrode biofilm
Methane production
Microbial community
Waste activated sludge

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10.1016/j.biortech.2024.131242

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title = "Linking performance to dynamic migration of biofilm ecosystem reveals the role of voltage in the start-up of hybrid microbial electrolysis cell-anaerobic digestion",

abstract = "Applied voltage is a crucial parameter in hybrid microbial electrolysis cells-anaerobic digestion (MEC-AD) systems for enhancing methane production from waste activated sludge (WAS). This study explored the impact of applied voltage on the initial biofilm formation on electrodes during the MEC-AD startup using raw WAS (Rr) and heat-pretreated WAS (Rh). The findings indicated that the maximum methane productivity for Rr and Rh were 3.4 ± 0.5 and 3.4 ± 0.2 mL/gVSS/d, respectively, increasing 1.5 times and 2.6 times over the productivity at 0 V. The biomass on electrode biofilms for Rr and Rh at 0.8 V increased by 70 % and 100 % compared to 0 V. The core functional microorganisms in the cathode biofilm were Methanobacterium and Syntrophomonas, and Geobacter in the anode biofilm, enhancing methane production through syntrophism and direct interspecies electron transfer, respectively. These results offer academic insights into optimizing AD functional electrode biofilms by applying voltage.",

keywords = "Applied voltage, Electrode biofilm, Methane production, Microbial community, Waste activated sludge",

author = "Wang, {Xue Ting} and Lei Zhao and Quan Zhang and Bo Wang and Defeng Xing and Jun Nan and Ren, {Nan Qi} and Lee, {Duu Jong} and Chuan Chen",

note = "Publisher Copyright: {\textcopyright} 2024",

year = "2024",

month = nov,

doi = "10.1016/j.biortech.2024.131242",

language = "English",

volume = "411",

journal = "Bioresource Technology",

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Linking performance to dynamic migration of biofilm ecosystem reveals the role of voltage in the start-up of hybrid microbial electrolysis cell-anaerobic digestion. / Wang, Xue Ting; Zhao, Lei; Zhang, Quan et al.
In: Bioresource Technology, Vol. 411, 131242, 11.2024.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

TY - JOUR

T1 - Linking performance to dynamic migration of biofilm ecosystem reveals the role of voltage in the start-up of hybrid microbial electrolysis cell-anaerobic digestion

AU - Wang, Xue Ting

AU - Zhao, Lei

AU - Zhang, Quan

AU - Wang, Bo

AU - Xing, Defeng

AU - Nan, Jun

AU - Ren, Nan Qi

AU - Lee, Duu Jong

AU - Chen, Chuan

PY - 2024/11

Y1 - 2024/11

N2 - Applied voltage is a crucial parameter in hybrid microbial electrolysis cells-anaerobic digestion (MEC-AD) systems for enhancing methane production from waste activated sludge (WAS). This study explored the impact of applied voltage on the initial biofilm formation on electrodes during the MEC-AD startup using raw WAS (Rr) and heat-pretreated WAS (Rh). The findings indicated that the maximum methane productivity for Rr and Rh were 3.4 ± 0.5 and 3.4 ± 0.2 mL/gVSS/d, respectively, increasing 1.5 times and 2.6 times over the productivity at 0 V. The biomass on electrode biofilms for Rr and Rh at 0.8 V increased by 70 % and 100 % compared to 0 V. The core functional microorganisms in the cathode biofilm were Methanobacterium and Syntrophomonas, and Geobacter in the anode biofilm, enhancing methane production through syntrophism and direct interspecies electron transfer, respectively. These results offer academic insights into optimizing AD functional electrode biofilms by applying voltage.

AB - Applied voltage is a crucial parameter in hybrid microbial electrolysis cells-anaerobic digestion (MEC-AD) systems for enhancing methane production from waste activated sludge (WAS). This study explored the impact of applied voltage on the initial biofilm formation on electrodes during the MEC-AD startup using raw WAS (Rr) and heat-pretreated WAS (Rh). The findings indicated that the maximum methane productivity for Rr and Rh were 3.4 ± 0.5 and 3.4 ± 0.2 mL/gVSS/d, respectively, increasing 1.5 times and 2.6 times over the productivity at 0 V. The biomass on electrode biofilms for Rr and Rh at 0.8 V increased by 70 % and 100 % compared to 0 V. The core functional microorganisms in the cathode biofilm were Methanobacterium and Syntrophomonas, and Geobacter in the anode biofilm, enhancing methane production through syntrophism and direct interspecies electron transfer, respectively. These results offer academic insights into optimizing AD functional electrode biofilms by applying voltage.

KW - Applied voltage

KW - Electrode biofilm

KW - Methane production

KW - Microbial community

KW - Waste activated sludge

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DO - 10.1016/j.biortech.2024.131242

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SN - 0960-8524

VL - 411

JO - Bioresource Technology

JF - Bioresource Technology

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Linking performance to dynamic migration of biofilm ecosystem reveals the role of voltage in the start-up of hybrid microbial electrolysis cell-anaerobic digestion

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