Development of an innovative MFC-biosensor for real-time monitoring of anaerobic digestion for biogas production : Controlled substrate feeding strategy

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Xiaoyun Leng
  • Muhammad Usman
  • El-Sayed Salama
  • Tuoyu Zhou
  • Byong-Hun Jeon
  • Pu Liu
  • Pengyun Zhang
  • Xiangkai Li

Detail(s)

Original languageEnglish
Article number106703
Journal / PublicationJournal of Environmental Chemical Engineering
Volume9
Issue number6
Online published2 Nov 2021
Publication statusPublished - Dec 2021
Externally publishedYes

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 ~6-fold and 1.5-fold higher than conventional groups. The developed portable biosensor (~$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.

Research Area(s)

  • Anaerobic digestion, Biogas, Biosensor, Microbial fuel cell, Substrate feeding, Volatile fatty acid

Citation Format(s)

Development of an innovative MFC-biosensor for real-time monitoring of anaerobic digestion for biogas production : Controlled substrate feeding strategy. / Leng, Xiaoyun; Usman, Muhammad; Salama, El-Sayed; Ni, Hongyuhang; Zhou, Tuoyu; Jeon, Byong-Hun; Liu, Pu; Zhang, Pengyun; Li, Xiangkai.

In: Journal of Environmental Chemical Engineering, Vol. 9, No. 6, 106703, 12.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review