Development of an innovative MFC-biosensor for real-time monitoring of anaerobic digestion for biogas production: Controlled substrate feeding strategy
- Authors
- Leng, Xiaoyun; Usman, Muhammad; Salama,El-Sayed; Ni, Hongyuhang; Zhou, Tuoyu; Jeon, Byong-Hun; Liu, Pu; Zhang, Pengyun; Li, Xiangkai
- Issue Date
- Dec-2021
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Anaerobic digestion; Biogas; Biosensor; Microbial fuel cell; Substrate feeding; Volatile fatty acid
- Citation
- JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING, v.9, no.6, pp.1 - 11
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
- Volume
- 9
- Number
- 6
- Start Page
- 1
- End Page
- 11
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/140191
- DOI
- 10.1016/j.jece.2021.106703
- Abstract
- A microbial fuel cell (MFC) based biosensor was designed to monitor volatile fatty acids (VFAs) in anaerobic digestion (AD) to control substrate feeding. The VFAs concentrations 7-40.83 mM showed a linear relationship with biosensor voltage (18-67 mV) indicating that voltage < 18 mV was due to low organic matter. Likewise, VFAs concentration lower than 7.87 mM resulted in decreased biogas production rate (BPR) and required substrate feeding. In a continuous food waste AD, the biosensor guided feeding produced 558 mL/g VS with the highest biomethane (62.17%), comparing with 344 and 387 mL/g VS produced by conventional 3- and 7-days intervals feeding, respectively. The microbial community was also more stable under the new strategy, where Prevotella and Methanosarcina were similar to 6-fold and 1.5-fold higher than conventional groups. The developed portable biosensor (similar to$200) worked effectively during outdoor monitoring of a domestic biogas plant. The VFAs based MFC biosensors can enhance the biogas yield with minimum substrate feeding while maintaining a suitable microbial community.
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