A large concentration of denitrifying bacteria and heterotrophic anaerobic bacteria was observed in the first 66 cm (lower part) of the reactor (Fig. 6), but the rest of the microorganisms studied were not present in large numbers.
A large concentration of denitrifying bacteria and heterotrophicanaerobic bacteria was observed in the first 66 cm(lower part) of the reactor (Fig. 6), but the rest of the microorganismsstudied were not present in large numbers.