Oxygen transfer rate estimation in oxidation ditches from clean water measurements

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 met...

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Bibliographic Details
Published in:Water research (Oxford) 2001-06, Vol.35 (8), p.2058-2064
Main Authors: Abusam, A., Keesman, K.J., Meinema, K., van Straten, G.
Format: Article
Language:English
Subjects:
aeration
afvalwaterbehandeling
Applied sciences
beluchting
Biological and medical sciences
Biological treatment of waters
Biotechnology
carrousel
Environment and pollution
Exact sciences and technology
Fresh Water - analysis
Fundamental and applied biological sciences. Psychology
General purification processes
Industrial applications and implications. Economical aspects
Kinetics
KLa
Models, Theoretical
Netherlands
overdracht
oxidatiesloten
oxidation ditch
oxidation ditches
Oxidation-Reduction
oxygen
Oxygen - analysis
oxygen transfer rate
Pollution
Sewage - analysis
transfer
waste water treatment
Wastewaters
Water - standards
Water treatment and pollution
zuurstof
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Summary: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).
ISSN:0043-1354
1879-2448
DOI:10.1016/S0043-1354(00)00451-6