Occurrence of power overshoot for two-chambered MFC at nearly steady-state operation

Anodic biofilm in single-chamber microbial fuel cells cultivated under different temperatures

“…The slope of V-I curve estimates the internal resistance (R in ) of the MFC of 212 U. No cell power shoot proposed by Nien et al [21] and Liu et al [22] was noted for the present MFC. When temperature of MFC A was reduced from 25 to 15 C, the corresponding OCV and I scc were slightly reduced ( Fig.…”

Electricity harvest from nitrate/sulfide-containing wastewaters using microbial fuel cell with autotrophic denitrifier, Pseudomonas sp. C27

“…The DNA of the strain was isolated following the procedure of Ref. [21]; the strain was identified by 16S rDNA sequencing using 11F (5 0 -GTT TGA TCM TGG CTC AG-3 0 ) and 1512R (5 0 -ACG GCT ACC TTG TTA CGA CT-3 0 ). The DNA was amplified using an eppendorf mastercycler (Eppendorf AG, Hamburg, Germany) by denaturation at 94 C for 3 min with 35 cycles of 94 C for 30 s, 54 C for 60 s, 72 C for 90 s, and a final extension at 72 C for 7 min.…”

“…Current density was normalized by the projected surface areas of anodic sides. Polarization curves were measured by applying a linear potential decrease of 1 mV s À1 from the open circuit voltage to 0 mV [21,22]. Coulombic efficiency was calculated by dividing coulomb output (integrating current and time) by total coulomb input (based on sulfide or acetate) according to previous literature.…”

Elimination of Power Overshoot at Bioanode through Assistance Current in Microbial Fuel Cells

“…However, during discharge tests in MFCs, an unexpected phenomenon referred to as “power overshoot” commonly occurs . Theoretically, the voltage and power (or power density) curves should vary directly with the current (or current density) during a discharge test .…”

“…The power overshoot is defined as a “doubling back” of the voltage and power curves toward lower currents, rather than increasing to the expected higher current . In other words, MFC performance tends to deteriorate after reaching the peak current . The power overshoot is therefore regarded as an obstacle to MFC development because it can complicate the interpretation of an MFC′s performance after reaching peak power loads.…”