INVESTIGADORES
CONTRERAS Edgardo Martin
congresos y reuniones científicas
Título:
Competitive growth kinetics of Sphaerotilus natans and Acinetobacter anitratus
Autor/es:
CONTRERAS E.; GIANNUZZI L.; ZARITZKY N.
Lugar:
Roma, Italia
Reunión:
Congreso; 3rd IWA International Specialised Conference on Microorganisms in Activated Sludge and Biofilm Processes; 2001
Resumen:
Growth kinetics of Sphaerotilus
natans and Acinetobacter anitratus
(strain E932) in pure and mixed cultures was studied. In order to determine
mixed cultures biomass composition, an image analysis quantitative technique
was developed. Pure cultures studies showed that for dilution rates less than 0.188 h-1, the filamentous
microorganism will predominate leading to bulking phenomena. By using the
developed techinque to determine biomass composition, mixed cultures experiments showed that changes
in the dilution rate modify the microbial composition of the biomass
determining which microorganism predominate. The obtained results agree
satisfactorily with the stated equations that predict the predominance of S. natans at low dilution rates.