alexa In situ microbial fuel cell-based biosensor for organic carbon.
Engineering

Engineering

Journal of Biosensors & Bioelectronics

Author(s): Peixoto L, Min B, Martins G, Brito AG, Kroff P,

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Abstract 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±23mA/m(2) was obtained with domestic wastewater containing a BOD(5) of 317±15mg O(2)/L at 22±2°C, 1.53±0.04mS/cm and pH 6.9±0.1. The current density showed a linear relationship with BOD(5) concentration ranging from 17±0.5mg O(2)/L to 78±7.6mg O(2)/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. Copyright © 2011 Elsevier B.V. All rights reserved. This article was published in Bioelectrochemistry and referenced in Journal of Biosensors & Bioelectronics

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