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This paper investigates the performance of a double chamber acetate-fed microbial fuel cell under unsteady-state conditions using numerical modeling.

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What they did

System
MFC

What worked

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Abstract

Abstract Microbial fuel cells (MFCs) are devices that utilize the work of microorganisms to oxidize organic substrate involving biochemical pathways. Several studies have been done based on experiments while simulation and modelling remain unexplored. Basically, MFCs have a lot of similarities to chemical fuel cell systems, which modelling and simulation have been widely developed. Hence, a study should be done to develop the model in order to widen the implementation of MFCs. In order to evaluate MFCs performance with less cost and time, numerical modelling might be an effective approach. Models could also be easily developed or modified for various operation conditions and configurations to generate experimental data on MFCs. A number of papers on simulation and modelling focused on cell voltage as function of both cell current density and chemicals concentration. In this paper, a double chamber acetate MFCs under continuous operation and unsteady state condition would be investigated. MFCs model based are developed by calculating biochemical reactions, Butler-Volmer equation, and electrochemical equations using MATLAB 2018a software. The parameters and constants data reported from recent literature are used. Results show that periodic flow rate of fuel could improve the power production. This result also gives the prediction of cell voltage and current density. Nevertheless, models with various conditions or configurations could be developed to scale-up or create more efficient MFCs using simple methods.

Key findings

  • The model developed using MATLAB 2018a software accurately simulates the biochemical reactions, Butler-Volmer equation, and electrochemical equations in the MFC.
  • The results show that the MFC's performance is affected by the concentration of acetate and the cell current density.
  • The model can be easily modified to simulate different operation conditions and configurations, making it a useful tool for optimizing MFC design and operation.

Keywords

Microbial fuel cellMATLABVoltageBiochemical engineeringProcess engineeringBiological system

Identifiers

DOI
10.1088/1757-899x/1143/1/012012
Journal
IOP Conference Series: Materials Science and Engineering
Year
2021