Growth Characteristics of Batch-Cultured Activated Sludge and Its Phosphate Elimination Capacity

Isolation and Characterization of Microsphaera multipartita gen. nov., sp. nov., a Polysaccharide-Accumulating Gram-Positive Bacterium from Activated Sludge

“…Early reports in the literature showed that large coccusshaped gram-positive bacteria constituted significant proportions of the bacterial flora of activated sludge loaded with carbohydrate-rich wastewater (28,30), although no detailed taxonomic study of these gram-positive cocci was performed thereafter. Activated sludge cultured under batch operational conditions with intermittent addition of substrate containing glucose showed rapid substrate uptake and accumulated substrate as polysaccharide which was later consumed slowly for the synthesis of DNA, RNA, and protein (20). Accordingly, to elucidate the mechanism of selection of bacteria in activated sludge processes, we focused on the capacity for substrate uptake and accumulation of bacteria that predominate in activated sludge acclimated with sugar wastewater.…”