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Characterizing Mediated Extracellular Electron Transfer in Lactic Acid Bacteria with a Three-Electrode, Two-Chamber Bioelectrochemical System

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Customized Multichannel Measurement System for Microbial Fuel Cell Characterization.

Nicola Lovecchio¹, Valentina Di Meo², Andrea Pietrelli^1,3

¹Department of Information Engineering, Electronics and Telecommunications, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy.

Bioengineering (Basel, Switzerland)

|May 27, 2023

Summary

A new, portable, and cost-effective system precisely measures microbial fuel cell (MFC) performance. This adaptable system, using sigma-delta converters, enables long-term, multi-channel power output analysis for sustainable energy research.

Keywords:

MFC characterization MFC measuring system automatic measurements customized electronics dual-channel board microbial fuel cell sigma-delta analog-to-digital converter transimpedance amplifier

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Area of Science:

* Renewable Energy Technologies
* Electrochemistry
* Instrumentation and Measurement

Background:

* Microbial Fuel Cells (MFCs) are a promising sustainable energy source.
* Accurate characterization of MFC performance is crucial for optimization.
* Existing measurement systems can be complex, costly, and lack portability.

Purpose of the Study:

* To develop an automatic, customized, and cost-effective measuring system for MFCs.
* To enable precise, long-term, and multi-channel power output measurements.
* To facilitate MFC performance analysis in diverse laboratory settings.

Main Methods:

* Employed sigma-delta analog-to-digital converters and transimpedance amplifiers.
* Implemented multi-step discharge protocols for power output assessment.
* Designed a portable and expandable system (2-12 channels) with variable time steps.

Main Results:

* Achieved high precision and low noise measurements of MFC voltage and current signals.
* Successfully detected and distinguished signals from multiple MFCs with varying outputs.
* Enabled determination of MFC output resistance through power measurements.

Conclusions:

* The developed system offers a versatile and accessible tool for MFC characterization.
* Facilitates research in sustainable energy production and MFC technology development.
* Its portability and cost-effectiveness make advanced MFC analysis widely available.