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Title: Multi-variable mathematical models for the air-cathode microbial fuel cell system

Journal Article · · Journal of Power Sources
 [1];  [2];  [1];  [2];  [1]
  1. Univ. of Tennessee, Knoxville, TN (United States). Dept. of Mechanical, Aerospace and Biomedical Engineering
  2. Pennsylvania State Univ., University Park, PA (United States). Dept. of Civil & Environmental Engineering

This research adopted the version control system into the model construction for the single chamber air-cathode microbial fuel cell (MFC) system, to understand the interrelation of biological, chemical, and electrochemical reactions. The anodic steady state model was used to consider the chemical species diffusion and electric migration influence to the MFC performance. In the cathodic steady state model, the mass transport and reactions in a multi-layer, abiotic cathode and multi-bacteria cathode biofilm were simulated. Transport of hydroxide was assumed for cathodic pH change. This assumption is an alternative to the typical notion of proton consumption during oxygen reduction to explain elevated cathode pH. The cathodic steady state model provided the power density and polarization curve performance results that can be compared to an experimental MFC system. Another aspect we considered was the relative contributions of platinum catalyst and microbes on the cathode to the oxygen reduction reaction (ORR). We found simulation results showed that the biocatalyst in a cathode that includes a Pt/C catalyst likely plays a minor role in ORR, contributing up to 8% of the total power calculated by the models.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; US Army Research Office
Grant/Contract Number:
AC05-00OR22725; W911NF-11-1-0531
OSTI ID:
1302945
Journal Information:
Journal of Power Sources, Vol. 314, Issue C; ISSN 0378-7753
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

References (22)

A computational model for biofilm-based microbial fuel cells journal July 2007
Conduction-based modeling of the biofilm anode of a microbial fuel cell journal December 2007
Model of steady-state-biofilm kinetics journal November 1980
A multispecies biofilm model journal March 1986
A general description of detachment for multidimensional modelling of biofilms journal May 2005
Microbial Fuel Cells:  Methodology and Technology journal September 2006
Importance of OH− Transport from Cathodes in Microbial Fuel Cells journal May 2012
In Situ Investigation of Cathode and Local Biofilm Microenvironments Reveals Important Roles of OH and Oxygen Transport in Microbial Fuel Cells journal April 2013
Effects of gas diffusion layer (GDL) and micro porous layer (MPL) on cathode performance in microbial fuel cells (MFCs) journal October 2011
Cathodic limitations in microbial fuel cells: An overview journal June 2008
Redox and pH Microenvironments within Shewanella oneidensis MR-1 Biofilms Reveal an Electron Transfer Mechanism journal August 2011
Production of Electricity during Wastewater Treatment Using a Single Chamber Microbial Fuel Cell journal April 2004
Evaluating the impacts of migration in the biofilm anode using the model PCBIOFILM journal September 2010
Modelling and simulation of two-chamber microbial fuel cell journal January 2010
Proton transport inside the biofilm limits electrical current generation by anode-respiring bacteria journal August 2008
Long-term cathode performance and the microbial communities that develop in microbial fuel cells fed different fermentation endproducts journal January 2011
Electricity Generation Using an Air-Cathode Single Chamber Microbial Fuel Cell in the Presence and Absence of a Proton Exchange Membrane journal July 2004
Increased performance of single-chamber microbial fuel cells using an improved cathode structure journal March 2006
Characterization of Microbial Fuel Cells at Microbially and Electrochemically Meaningful Time scales journal March 2011
Production of Electricity from Proteins Using a Microbial Fuel Cell journal May 2006
Reference and counter electrode positions affect electrochemical characterization of bioanodes in different bioelectrochemical systems: Reference and Counter Electrode Positions journal June 2014
Polypyrrole/carbon black composite as a novel oxygen reduction catalyst for microbial fuel cells journal June 2010

Cited By (1)