Oxygen transfer rate estimation in oxidation ditches from clean water measurements.
Water Res
; 35(8): 2058-64, 2001 Jun.
Article
em En
| MEDLINE
| ID: mdl-11337854
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).
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Base de dados:
MEDLINE
Assunto principal:
Oxigênio
/
Água Doce
Tipo de estudo:
Prognostic_studies
País como assunto:
Europa
Idioma:
En
Ano de publicação:
2001
Tipo de documento:
Article