H. Horn, DYNAMICS OF A NITRIFYING BACTERIA POPULATION IN A BIOFILM CONTROLLED BY AN OXYGEN MICROELECTRODE, Water science and technology, 29(10-11), 1994, pp. 69-76
Citations number
8
Categorie Soggetti
Water Resources","Environmental Sciences","Engineering, Civil
Population dynamics of nitrifying bacteria in an autotrophic biofilm w
ere studied using an oxygen microelectrode. Nitrification and endogeno
us respiration were measured as function of oxygen concentration. over
a five weeks substrate-limiting period the shape of oxygen profiles i
n the biofilm had changed. The activity in the biofilm showed that the
autotrophic fraction was displaced to the bulk/biofilm interface. Aft
er 5 weeks no more activity could be measured below 800 mu m in the su
bstrate-limited biofilm. Full ammonia load couldn't be buffered by tho
se biofilms. After setting back the biofilm to full load, the profiles
reached the original shape after 5 days. The results of microelectrod
e measurements were used to evaluate data for modelling population dyn
amics of nitrifying bacteria.