Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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On-Line Monitoring of Low Biochemical Oxygen Demand Through Continuous Operation of a Mediator-Less Microbial Fuel Cell

  • MOON, HYUN-SOO (Water Environment and Remediation Research Center, Korea Institute of Science and Technology) ;
  • CHANG, IN-SEO (Water Environment and Remediation Research Center, Korea Institute of Science and Technology) ;
  • JANG, JAE-KYUNG (Water Environment and Remediation Research Center, Korea Institute of Science and Technology) ;
  • KIM, KYUNG-SHIK (Water Environment and Remediation Research Center, Korea Institute of Science and Technology) ;
  • LEE, JI-YOUNG (Water Environment and Remediation Research Center, Korea Institute of Science and Technology) ;
  • LOVITT, ROBERT W. (Center for Complex Fluids Processing, Multidisplinary Nanotechnology Center, School of Engineering, University of Wales Swansea) ;
  • KIM, BYUNG-HONG (Water Environment and Remediation Research Center, Korea Institute of Science and Technology)
  • Published : 2005.02.01
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Abstract

Abstract Oligotrophic microbial fuel cells (MFCs) were tested for the continuous monitoring of low biochemical oxygen demand (BOD) by using artificial wastewater, containing glucose and glutamate, as check solution. Ten times diluted trace mineral solution was used to minimize the background current level, which is generated from the oxidation of nitrilotriacetate used as a chelating agent. The feeding rate of 0.53 ml/min could increase the sensitivity from 0.16 to 0.43 ${\mu}$A/(mg BOD/l) at 0.15 ml/min. The dynamic linear range of the calibration curve was between 2.0 and 10.0 mg BOD/l, and the response time to the change of 2 mg BOD/l was about 60 min. The current signal from an oligotroph-type MFCs increased with the increase in salts concentration, and the salt effect could be eliminated by 50 mM phosphate buffer.

Keywords

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