Nittami, Tadashi


Publications
4

The impact of biotic and abiotic interactions on Candidatus Kouleothrix bulking in a full-scale activated sludge anaerobic-anoxic-oxic plant in Japan

Citation
Nittami et al. (2025). Scientific Reports 15 (1)
Names
Kouleothrix
Abstract
Abstract The genus “Candidatus Kouleothrix” (Eikelboom type 1851) is the major filamentous bacterium responsible for activated sludge bulking in Japanese activated sludge plants, where it is present in many in unusually high abundances. Global surveys have shown this genus embraces several species, although the contribution each of these makes to bulking is not known. This study followed their population dynamics in a full-scale bulking sludge plant in Japan over a 12-month period, whi

Exploring the operating factors controlling Kouleothrix (type 1851), the dominant filamentous bacterial population, in a full-scale A2O plant

Citation
Nittami et al. (2020). Scientific Reports 10 (1)
Names
Kouleothrix
Abstract
AbstractThis study reveals that the abundance of the filament Kouleothrix (Eikelboom type 1851) correlated positively with poor settleability of activated sludge biomass in a Japanese full-scale nutrient removal wastewater treatment plant sampled over a one-year period. 16S rRNA amplicon sequence data confirmed that Kouleothrix was the dominant filament in the plant, with a relative abundance of 3.06% positively correlated with sludge volume index (SVI) (R = 0.691). Moreover, Kouleothrix (type 1