Abstract
In order to elucidate Nocardia (Gordona) amarae profiles in sequencing fed-batch culture of activated sludge, experimental invesitigations were carried out under various operational conditions e.g. sludge retention time (SRT), addition of N. amarae culture solution and change of carbon source. Growth of N. amarae in the aeration tank was confirmed corresponding to the component of influent substrate, being affecting SRT values. However, the possibility was suggested that the scum production was connected with some induced factors such as n-hexadecane, not being determined by N. amarae biomass only. It was concluded that SRT control was not necessarily effective after the scum production.
