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Oxygen transfer limitation in a respirometer
Author(s) -
Li Kuyen Y.,
Zhang Yuebo B.
Publication year - 1996
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143096x127190
Subject(s) - respirometer , oxygen , respirometry , chemistry , limiting oxygen concentration , reaction rate , reaction rate constant , analytical chemistry (journal) , thermodynamics , kinetics , chromatography , biochemistry , catalysis , organic chemistry , physics , quantum mechanics
The oxygen uptake process in a respirometer was analyzed by a mathematical model consisting of oxygen transfer accompanied with oxygen consumption reaction. The criterion to avoid an oxygen‐transfer limitation was derived on the basis of the ratio of the maximum biochemical reaction rate to the maximum possible oxygen‐transfer rate. The maximum biochemical reaction is described by the first‐order rate equation, whereas the maximum possible oxygen‐transfer rate is calculated by multiplying the oxygen‐transfer coefficient with the solubility of oxygen in water. An oxygen‐transfer coefficient in a respirometric reactor was estimated as 1.8 h −1 , by using the model analysis of an oxygen uptake data from the same reactor. A simplified criterion for a respirometer without oxygen‐transfer limitation is then obtained as XS ≪ 16.51/K 1 where X and S represent concentration of biomass and substrate, respectively, and K 1 is the first‐order rate constant, (L/mg VSS)/h.