Аннотации:
Natural resources are in short supply, and the ecosystem is being damaged as a result
of the overuse of fossil fuels. The creation of novel technology is greatly desired for investigating
renewable and sustainable energy sources. Microorganisms have received a lot of interest recently
for their potential to transform organic waste into sustainable energy and high-value goods. New
exoelectrogens that can transmit electrons to electrodes and remove specific wastewater contaminants
are expected to be studied. In this study, we examined three distinct samples (as determined by
chemical oxygen demand and pH) that can be used as anolytes to generate power in single-chamber
and double-chamber microbial fuel cells using graphite electrodes. Wastewater from poultry farms
was studied as an exoelectrogenic anolyte for microbial fuel cell power generation. The study
examined 10 different bacterial strains, numbered A1 through A10. Due to their highly anticipated
capacity to metabolize organic/inorganic chemicals, the diverse range of microorganisms found in
poultry wastewater inspired us to investigate the viability of generating electricity using microbial fuel
cells. From the investigated bacterial strains, the highest voltage outputs were produced by strains
A1 (Lysinibacillus sphaericus) and A2 (Bacillus cereus), respectively, at 402 mV and 350 mV. Among the
10 different bacterial strains, strain A6 generated the least amount of electricity, measuring 35.03 mV.
Furthermore, a maximum power density of 16.16 1.02 mW/m2 was achieved by the microbial fuel
cell using strain A1, significantly outperforming the microbial fuel cell using a sterile medium. The
strain A2 showed significant current and power densities of 35 1.12 mA/m2 and 12.25 1.05 mW/m2
,
respectively. Moreover, in the two representative strains, chemical oxygen demand removal and
Coulombic efficiency were noted. Samples from the effluent anode chamber were taken in order to
gauge the effectiveness of chemical oxygen demand removal. Wastewater had an initial chemical oxygen demand content of 350 mg/L on average. Strains A1 and A2 decomposed 94.28% and
91.71%, respectively, of the organic substrate, according to the chemical oxygen demand removal
efficiency values after 72 h. Strains A1 and A2 had electron donor oxidation efficiencies for 72 h
of 54.1% and 60.67%, respectively. The Coulombic efficiency increased as the chemical oxygen
demand decreased, indicating greater microbial electroactivity. With representative strains A1 and
A2, Coulombic efficiencies of 10% and 3.5%, respectively, were obtained in the microbial fuel cell. The
findings of this study greatly advance the field as a viable source of power technology for alternative
energy in the future, which is important given the depletion of natural resources.
