Several notable bacterial genera were detected across all reactors, though with varying relative abundances. Symbiobacterium, a thermophilic bacterium involved in nitrate reduction was observed. Additionally, the sulfate-reducing bacteria Desulfosporosinus and Desulfitibacter were also identified. Syntrophobotulus, known for its role in homoacetogenesis or methanogenesis by oxidizing glycolate to CO2 and H2 was detected. Other genera include Pelotomaculum, capable of oxidizing propionic acid , and Tepidimicrobium, a hydrolytic bacterium involved in Fe(III) reduction were present as well.