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TitleIn situ microbial fuel cell-based biosensor for organic carbon
Author(s)Peixoto, L.
Min, Booki
Martins, Gilberto
Brito, A. G.
Kroff, P.
Parpot, Pier
Angelidaki, I.
Nogueira, R.
KeywordsSubmersible microbial fuel cell
Biological oxygen demand biosensor
Wastewater quality
Issue date16-Feb-2011
Abstract(s)The biological oxygen demand (BOD) may be the most used test to assess the amount of pollutant organic matter in water; however, it is time and labor consuming, and is done ex-situ. A BOD biosensor based on the microbial fuel cell principle was tested for online and in situ monitoring of biodegradable organic content of domestic wastewater. A stable current density of 282±23 mA/m2 was obtained with domestic wastewater containing a BOD5 of 317±15 mg O2/L at 22±2 °C, 1.53±0.04 mS/cm and pH 6.9±0.1. The current density showed a linear relationship with BOD5 concentration ranging from 17±0.5 mg O2/L to 78±7.6 mg O2/L. The current generation from the BOD biosensor was dependent on the measurement conditions such as temperature, conductivity, and pH. Thus, a correction factor should be applied to measurements done under different environmental conditions from the ones used in the calibration. These results provide useful information for the development of a biosensor for real-time in situ monitoring of wastewater quality.
AccessRestricted access (UMinho)
Appears in Collections:CDQuim - Artigos (Papers)

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