Bucking the current trend in bioelectrochemical systems: a case for bioelectroanalytics

Area of Science:

• Environmental Science
• Microbiology
• Electrochemistry

Background:

• Microbial fuel cells (MFCs) offer a conceptual approach to generating electricity from wastewater using microbial extracellular electron transfer (EET).
• Despite over a decade of research, MFCs face challenges in industrial-scale application and cost-effectiveness, limiting their energy-centric goals.

Purpose of the Study:

• To re-evaluate the application of microbial fuel cells (MFCs) and bioelectrochemical systems (BES).
• To shift the research focus from energy generation to bioelectroanalytics, leveraging microbial EET for broader applications.
• To explore new research directions for MFCs and BES beyond the waste-energy dichotomy.

Main Methods:

• Literature review of bioelectrochemical systems and extracellular electron transfer (EET).
• Analysis of research focusing on device performance versus analytical applications.
• Exploration of advances in genetic techniques for microbial analysis.

Main Results:

• MFCs' potential for industrial energy generation is limited, despite scientific rigor.
• Understanding of EET is often constrained by a focus on device performance.
• Bioelectroanalytics offers a promising alternative application for BES.

Conclusions:

• The field should pivot from solely focusing on energy generation in MFCs towards bioelectroanalytics.
• Microbial interactions with electrodes can provide valuable data for environmental and medical diagnostics.
• Harnessing bioelectroanalytics can address wider societal challenges, including climate change and public health.