title: Oxygen transfer rate estimation in oxidation ditches from clean water measurements.
abstract: Standard methods for the determination of oxygen transfer rate are based on assumptions that are not valid for oxidation ditches. This paper presents a realistic and simple new method to be used in the estimation of oxygen transfer rate in oxidation ditches from clean water measurements. The new method uses a loop-of-CSTRs model, which can be easily incorporated within control algorithms, for modelling oxidation ditches. Further, this method assumes zero oxygen transfer rates (KLa) in the unaerated CSTRs. Application of a formal estimation procedure to real data revealed that the aeration constant (k = KLaVA, where VA is the volume of the aerated CSTR) can be determined significantly more accurately than KLa and VA. Therefore, the new method estimates k instead of KLa. From application to real data, this method proved to be more accurate than the commonly used Dutch standard method (STORA, 1980).
authors.affiliation: Systems and Control Group, Department of Agricultural, Environmental and Systems Technology, Wageningen University, Bomenweg 4, 6703 HD Wageningen, Netherlands. abdallah.abusam@user.aenf.wau.nl
authors.forename: A
authors.initials: A
authors.lastname: Abusam
authors.forename: K J
authors.initials: KJ
authors.lastname: Keesman
authors.forename: K
authors.initials: K
authors.lastname: Meinema
authors.forename: G
authors.initials: G
authors.lastname: Van Straten
mesh_terms: D005618:Fresh Water / Q000032:analysis*; D007700:Kinetics; D008962:Models, Theoretical; D009426:Netherlands; D010084:Oxidation-Reduction; D010100:Oxygen / Q000032:analysis*; D012722:Sewage / Q000032:analysis; D014867:Water / Q000592:standards
chemical_list: D012722:Sewage; D014867:Water; D010100:Oxygen