title: Batteryless, wireless sensor powered by a sediment microbial fuel cell.
abstract: Sediment microbial fuel cells (SMFCs) are considered to be an alternative renewable power source for remote monitoring. There are two main challenges to using SMFCs as power sources: 1) a SMFC produces a low potential at which most sensor electronics do not operate, and 2) a SMFC cannot provide continuous power, so energy from the SMFC must be stored and then used to repower sensor electronics intermittently. In this study, we developed a SMFC and a power management system (PMS) to power a batteryless, wireless sensor. A SMFC operating with a microbial anode and cathode, located in the Palouse River, Pullman, Washington, U.S.A., was used to demonstrate the utility of the developed system. The designed PMS stored microbial energy and then started powering the wireless sensor when the SMFC potential reached 320 mV. It continued powering until the SMFC potential dropped below 52 mV. The system was repowered when the SMFC potential increased to 320 mV, and this repowering continued as long as microbial reactions continued. We demonstrated that a microbial fuel cell with a microbial anode and cathode can be used as an effective renewable power source for remote monitoring using custom-designed electronics.
authors.affiliation: School of Electrical and Computer Engineering, Washington State University, Pullman, Washington 99163-2710, USA.
authors.forename: Conrad
authors.initials: C
authors.lastname: Donovan
authors.forename: Alim
authors.initials: A
authors.lastname: Dewan
authors.forename: Deukhyoun
authors.initials: D
authors.lastname: Heo
authors.forename: Haluk
authors.initials: H
authors.lastname: Beyenal
mesh_terms: D001673:Biodegradation, Environmental; D001674:Bioelectric Energy Sources; D011211:Electric Power Supplies; D004560:Electricity; D004566:Electrodes; D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods; D004867:Equipment Design; D019015:Geologic Sediments / Q000737:chemistry / Q000382:microbiology; D045483:Rivers; D014861:Washington