title: Continuous determination of biochemical oxygen demand using microbial fuel cell type biosensor.
abstract: A mediator-less microbial fuel cell (MFC) was used as a biochemical oxygen demand (BOD) sensor in an amperometric mode for real-time wastewater monitoring. At a hydraulic retention time of 1.05 h, BOD values of up to 100 mg/l were measured based on a linear relationship, while higher BOD values were measured using a lower feeding rate. About 60 min was required to reach a new steady-state current after the MFCs had been fed with different strength artificial wastewaters (Aws). The current generated from the MFCs fed with AW with a BOD of 100 mg/l was compared to determine the repeatability, and the difference was less than 10%. When the MFC was starved, the original current value was regained with a varying recovery time depending on the length of the starvation. During starvation, the MFC generated a background level current, probably due to an endogenous metabolism.
authors.affiliation: Water Environment & Remediation Research Center, Korea Institute of Science and Technology, 39-1, Hawolgok-dong, Sungpook-ku, Seoul 136-791, South Korea.
authors.forename: In Seop
authors.initials: IS
authors.lastname: Chang
authors.forename: Jae Kyung
authors.initials: JK
authors.lastname: Jang
authors.forename: Geun Cheol
authors.initials: GC
authors.lastname: Gil
authors.forename: Mia
authors.initials: M
authors.lastname: Kim
authors.forename: Hyung Joo
authors.initials: HJ
authors.lastname: Kim
authors.forename: Byung Won
authors.initials: BW
authors.lastname: Cho
authors.forename: Byung Hong
authors.initials: BH
authors.lastname: Kim
mesh_terms: D001674:Bioelectric Energy Sources / Q000382:microbiology*; D015374:Biosensing Techniques / Q000295:instrumentation* / Q000379:methods; D004784:Environmental Monitoring / Q000295:instrumentation* / Q000379:methods; D004867:Equipment Design; D019544:Equipment Failure Analysis; D010100:Oxygen / Q000032:analysis* / Q000378:metabolism*; D010101:Oxygen Consumption / Q000502:physiology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014871:Water Microbiology; D014873:Water Pollutants / Q000032:analysis
chemical_list: D014873:Water Pollutants; D010100:Oxygen