Bioelectricity from pyrolyzed biomass-aided plant microbial fuel cell considering impact of different particle sizes of biochar

Chen B. Rattan B. Gan S. Garg A. S S.
May 2025 Springer Science and Business Media Deutschland GmbH

Biomass Conversion and Biorefinery
2025 #15 Issue 10 16123 - 16135 pp.

Plant microbial fuel cell (PMFC) development, still in early stages, faces challenges like drought susceptibility and low power output, hindering practical applications. Biochar, known for enhancing soil water retention and microbial activity, lacks research on its particle size effects on soil–plant-microbe-atmosphere interactions. This study investigates how biochar particle size influences the relationship between bioelectricity generation and soil water characteristics. The experimental design involved a series of PMFCs with biochar of varying particle sizes: (i) < 0.3 mm, (ii) 0.3–1.18 mm, and (iii) > 1.18 mm. The results show that smaller biochar particles improved soil water retention by 25% compared to the control soil. Water retention also diminished over time, particularly with larger particles. The study observed slight fluctuations in bioelectric current over time, with a significant reduction after the air-entry value (AEV). Additionally, the findings indicate a direct relationship between biochar size and the electric current in PMFCs. Bioelectricity production increased by two to three times with substantial biochar particles, achieving a maximum power density of 13.8 µW/cm². These findings underscore the potential of biochar to enhance PMFC performance, contributing to sustainable energy systems.

Biochar particle size , Bioelectricity , PMFC , Soil water characteristics

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Department of Civil Engineering, Indian Institute of Technology (IIT), Assam, Guwahati, India
Department of Civil and Intelligent Construction Engineering, Shantou University, Shantou, China
L.N. Gumilyov, Eurasian National University, Astana, Kazakhstan

Department of Civil Engineering
Department of Civil and Intelligent Construction Engineering
L.N. Gumilyov

10 лет помогаем публиковать статьи Международный издатель

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