Archive | 2021
Correlation between voltage, dissolved oxygen, and power density of yeast microbial fuel cell in different environmental waters as catholyte
Abstract
Submersible yeast MFC was developed, while the voltage and the maximum power density (MPD) were calculated and analyzed. A quantitative correlation was obtained between the voltage and DO level of distilled water as the catholyte (y = 0.9828e0.3623x; R2 = 0.9978). While the correlation between voltage, DO level, and MPD was obtained by varying samples of environmental waters as a catholyte. The pattern that occurs was that seawater has a high MPD of about 21.92\u2005mW/m2 with a voltage and DO level of 12.53 ± 2.25\u2005mV and 6.0 ± 0.2\u2005mg/L, respectively. This voltage and DO are more or less similar to river water with 12.99 ± 0.38\u2005mV and 6.4 ± 0.6\u2005mg/L values, respectively, but river water has a lower MPD of 10.10mW/ m2 due to relatively low conductivity. While MPD in lake water and tap water was 4.69 and 11.79\u2005mW/m2, with DO levels of 5.7 ± 0.6 and 3.3 ± 0.6\u2005mg/L, and voltages around 9.69 ± 0.89 and 2.67 ± 0.10\u2005mV. The relationship between the three was very complicated because it is influenced by many things such as conductivity, pH, temperature, and organic matter from the catholyte.