title: A new approach to determine the kinetic parameters for nitrifying microorganisms in the activated sludge systems.
abstract: This work aims at establishing the methodology to determine kinetic parameters describing growth of autotrophs in the activated sludge systems. It is based upon the measurement of oxygen uptake rate (OUR) only. Two Monod kinetic parameters, namely maximum specific growth rate for autotrophic biomass (μ(max,A)) and half-saturation constant for ammonium ions (K(A)) were simply and rapidly determined within a single batch OUR test with the use of ammonified wastewater. The obtained mean values of the parameters are μ(max,A)=0.675 h(-1) and K(A)=0.912 mg NH(3)-Nl(-1) and they are close to the ones assumed in activated sludge models. It indicates that the methodology of the respiratory batch test elaborated in this study is reliable.
authors.affiliation: Technical University of Lodz, Institute of Fermentation Technology and Microbiology, ul. Wolczanska 171/173, 90-924 Lodz, Poland. ewa.liwarska-bizukojc@p.lodz.pl
authors.forename: Ewa
authors.initials: E
authors.lastname: Liwarska-Bizukojc
authors.forename: Marcin
authors.initials: M
authors.lastname: Bizukojc
mesh_terms: D000332:Aerobiosis; D000468:Alkalies / Q000737:chemistry; D052818:Autotrophic Processes; D001419:Bacteria / Q000378:metabolism*; D061249:Batch Cell Culture Techniques; D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D007700:Kinetics; D009566:Nitrates / Q000032:analysis; D058465:Nitrification; D009573:Nitrites / Q000032:analysis; D009584:Nitrogen / Q000032:analysis; D010100:Oxygen / Q000032:analysis; D000644:Quaternary Ammonium Compounds / Q000032:analysis; D012722:Sewage / Q000382:microbiology*; D012995:Solubility
chemical_list: D000468:Alkalies; D009566:Nitrates; D009573:Nitrites; D000644:Quaternary Ammonium Compounds; D012722:Sewage; D009584:Nitrogen; D010100:Oxygen