Environmental Engineering Reference
In-Depth Information
rate
1
0.9
0.8
0.7
0.6
0.5
Monod - Michaelis / Menten
Blackwell
0.4
0.3
0.2
0.1
concentration
0
0
1
2
3
4
5
Fig. 7.1
Monod - Michaelis/Menten and Blackwell kinetics (normalized)
7.3 Monod, Michaelis-Menten and Blackwell Kinetics
When biological species are involved, another description for rate is often used. In
analogy to an approach proposed by Michaelis
1
and Menten
2
already three decades
before (Michaelis and Menten
1913
), Monod
3
suggested the following term to
describe the growth of bacteria cultures in the 1940s of the twentieth century
(Monod
1949
) (Fig.
7.1
):
c
c
2
þc
q ¼ r
(7.11)
Sidebar 7.1: Free Radical Reactions in the Atmosphere
Understanding the behavior of free radicals in the atmosphere is of paramount
importance for the understanding of lifetime and hence of spatial scales of
pollutant transport. Free radicals participate in photochemical reactions,
which are initiated by light. Most free radical species have short life spans.
However, they can promote the conversion of ozone to oxygen and thus take
part in the catalytic cycle of ozone destruction. The most important radical
acting in the lower atmosphere is the hydroxyl radical OH. A system of free
radical reactions involving OH is given by
(continued)
1
Leonor Michaelis (1875-1949), German-American biochemist.
2
Maud Leonora Menten 1879-1960), Canadian physician.
3
Jacques Lucien Monod, 1910-1976, French biochemist.
