A microfluidic microbial fuel cell array that supports long-term multiplexed analyses of electricigens

Area of Science:

• Renewable Energy Technologies
• Environmental Biotechnology
• Microbial Electrochemistry

Background:

• Microbial fuel cells (MFCs) offer sustainable electricity generation via microbial metabolism.
• Widespread MFC adoption is hindered by high costs and low power output.
• Current MFC arrays lack long-term stability and high-throughput screening capabilities for field conditions.

Purpose of the Study:

• To develop a microfluidic MFC array system for continuous, long-term, high-throughput performance analysis.
• To investigate the impact of periodic anolyte/catholyte replenishment on MFC performance.
• To screen diverse microbial consortia for enhanced MFC power generation.

Main Methods:

• Engineered a microfluidic MFC array incorporating periodic anolyte/catholyte replenishment.
• Utilized high-throughput screening to analyze MFC performance under continuous operation.
• Collected and screened microbial consortia from diverse geographical locations.

Main Results:

• The developed MFC array demonstrated a 360% increase in power output compared to systems without replenishment.
• Operating time was extended by 700% due to continuous anolyte/catholyte replenishment.
• Successfully identified microbial consortia that enhance MFC performance.

Conclusions:

• Periodic anolyte/catholyte replenishment significantly improves long-term performance and power output in microfabricated MFC arrays.
• The microfluidic MFC array system enables effective high-throughput screening of microbial consortia for energy applications.
• This technology advances the development of practical and efficient microbial fuel cell systems.