English abstract
The environmental drawbacks of energy production from fossil fuels can be substantially
mitigated by transitioning to alternative renewable energy sources. The growing
inclination towards renewable energy has amplified the adoption of anaerobic digestion
(AD), evident from the surge in AD globally. AD efficiently converts organic waste into
biogas, a versatile renewable energy medium, suitable for electricity generation, heating,
and vehicle fuel, offering notable economic, environmental, and climatic advantages. In
essence, AD involves the biological breakdown of organic materials into biogas, primarily
composed of methane (50-70%) and CO2 (30-50%). It is worth noting that the potential of
biogas generation is intrinsically linked to certain chemical properties, notably pH, total
solids, volatile solids, and nitrogen. Furthermore, the efficiency of methane generation is
influenced by waste attributes, operational factors, and reactor designs. In this study, I
employed a dual approach involving a carbon brush and a fixed 1% VS dosage of enzyme
mixture to examine methane gas production within a thermophilic (water bath) anaerobic
digestion system. Four distinct thermophilic anaerobic digesters (TADs) were employed:
a standard TAD (TAD-1) without adding any external enzyme and conductive material as
a control, enzyme-assisted TAD (TAD-2), carbon electrode-assisted TAD (TAD-3), a
combination of electrode and enzyme in TAD (TAD-4), and. The findings highlighted that
the combined enzyme and carbon brush-assisted TAD-4 was the most effective in biogas
generation, solid waste reduction, and COD removal. Specifically, this approach yielded
an impressive 5300 mL of biogas in 10 days, outperforming other methods. Concurrently,
reductions in total solids and COD were observed at 59.29% and 65%, respectively, within
the same period. In addition, Thermophilic digestion allowed for shorter retention time in
anaerobic digesters which was completed in 3 days of this experiment. This research
signifies progress in optimizing resource recovery from organic waste through thermal
processes
