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Sensors 2016, 16(1), 101; doi:10.3390/s16010101

A Terrestrial Single Chamber Microbial Fuel Cell-based Biosensor for Biochemical Oxygen Demand of Synthetic Rice Washed Wastewater

1
Centro de Investigación de Energías Alternativas y Ambiente, Facultad de Ciencias, Escuela Superior Politécnica de Chimborazo (ESPOCH), Panamericana Sur Km 1 ½, Chimborazo EC060155, Ecuador
2
Faculty of Science and Informatics, University of Szeged, Közép fasor 52, Szeged H-6726, Hungary
3
Department of Chemical and Process Engineering, Faculty of Engineering & Built Environment, National University of Malaysia (UKM), UKM Bangi, Selangor 43600, Malaysia
4
Escuela de Ingeniería Ambiental, Universidad Nacional de Chimborazo, Chimborazo EC060103, Ecuador
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: I-Ming Hsing
Received: 10 November 2015 / Revised: 4 January 2016 / Accepted: 11 January 2016 / Published: 15 January 2016
(This article belongs to the Section Biosensors)
View Full-Text   |   Download PDF [529 KB, uploaded 18 January 2016]   |  

Abstract

Microbial fuel cells represent an innovative technology which allow simultaneous waste treatment, electricity production, and environmental monitoring. This study provides a preliminary investigation of the use of terrestrial Single chamber Microbial Fuel Cells (SMFCs) as biosensors. Three cells were created using Andean soil, each one for monitoring a BOD concentration of synthetic washed rice wastewater (SRWW) of 10, 100, and 200 mg/L for SMFC1, SMFC2 and SMFC3, respectively. The results showed transient, exponential, and steady stages in the SMFCs. The maximum open circuit voltage (OCV) peaks were reached during the elapsed time of the transient stages, according to the tested BOD concentrations. A good linearity between OCV and time was observed in the increasing stage. The average OCV in this stage increased independently of the tested concentrations. SMFC1 required less time than SMFC2 to reach the steady stage, suggesting the BOD concentration is an influencing factor in SMFCs, and SMFC3 did not reach it. The OCV ratios were between 40.6–58.8 mV and 18.2–32.9 mV for SMFC1 and SMFC2. The reproducibility of the SMFCs was observed in four and three cycles for SMFC1 and SMFC2, respectively. The presented SMFCs had a good response and reproducibility as biosensor devices, and could be an alternative for environmental monitoring. View Full-Text
Keywords: microbial fuel cell; biological oxygen demand (BOD); biosensor microbial fuel cell; biological oxygen demand (BOD); biosensor
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Logroño, W.; Guambo, A.; Pérez, M.; Kadier, A.; Recalde, C. A Terrestrial Single Chamber Microbial Fuel Cell-based Biosensor for Biochemical Oxygen Demand of Synthetic Rice Washed Wastewater. Sensors 2016, 16, 101.

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