Variation of power generation at different buffer types and conductivities in single chamber microbial fuel cells

The overshoot phenomenon as a function of internal resistance in microbial fuel cells

“…A theory recently proposed is that these underperformances result from ionic and electrical depletion at the lower resistance values [6]. Another suggestion is that it is the result of an insufficient sample rate such that the microbial contingent are not given enough time to adjust to each new resistance value [9], resulting in a rapidly declining voltage that is still dropping when the next new resistance is introduced. Much advancement has been made in recent years suggesting that the scale-up of MFC technology could be achievable.…”

Azo dye decolorization in an up-flow bioelectrochemical reactor with domestic wastewater as a cost-effective yet highly efficient electron donor source

“…In regard to a BES, conductivity of the wastewater is often considered to significantly influence the performance (Nam et al, 2010). Unlike to adding solid electron donors, DW as electron donor source would dilute the original azo dye containing wastewater and consequently can decrease the conductivity in mixed wastewater, which could ostensibly make the DW as electrode donor source doubtful.…”

Power recovery coupled with sulfide and nitrate removal in separate chambers using a microbial fuel cell

“…Two possible factors led to this close sulfide removal loadings under different buffer conditions: i) inadequate sulfide supply; ii) inconsiderable effect of buffer on spontaneous electrochemical oxidation of sulfide. Besides maintaining stable pH for microorganisms, buffer affects the power generation of MFC mainly by influencing solution conductivity [15]. Low power density and nitrate removal loading but high internal resistance were obtained under buffer free condition.…”

“…When the performance of power recovery and pollutant removal were both considered, attention on factors such as buffer, hydraulic retention time (HRT) and temperature would be paid. The buffer affects MFC performance by interaction with the electrodes, bacteria, and membrane [15,16]. HRT has a considerable effect on the power generation and pollutant removal performance of MFC mainly through varying substrate supply and mass transport [13,17].…”