Treatment Plants for Nitrification
HETEROTROPHIC ORGANISMS
Maximum growth rate
!lmax,H
2.00
d-1
Saturation constant
COD
I 10.00 gCODim 3
NH4
l 0.10
gNim 3
O:z
I 0.10
gChlm 3
HC03
l 0.10
eqvlm3
N03
l 0.50
gNim 3
Fraction denitrifiers
Tlg
0.70
Decay constant
bH
0.35
d-1
Yield constant
YH
0.57
gCODigCOD
Inert fraction
fx,xi
0.08
Nitrogen content of biomass
fxB,N
0.06
gNigCOD
Inert fraction decay
fi.N
0.05
gNigCOD
NITROSOMONAS
Maximum growth rate
llmax,NS
0.35
d-1
Saturation constant
NH!
l 0.70
gNim 3
HC03
l 0.20
eqvlm 3
O:z
l 0.20
gChlm 3
Decay constant
bA,NS
0.05
d-1
Yield constant
YA,NS
0.18
gCODigN02-N
NITROBACTER
Maximum growth rate
J.lmax,NB
0.60
d-1
Saturation constant
NHt
l 0.05
gNim 3
N02
l 0.50
gNim 3
O:z
Ks,02,NB
0.10
gChlm 3
Decay constant
bA,NB
0.09
d-1
Yield constant
YA,NB
0.06
gCODigN03-N
Table 6.3
Kinetic, stoichiometric and physical parameters in rotating discs I 41.
Oxygen
106
COD (glucose)
31
Ammonium
86
Nitrite
85
Nitrate
84
Bicarbonate
53
Table 6.4
Diffusion coefficients in biofilms I 41. Unit 10-6m 2 · d- 1
The model mentioned in Chapter 5 can give a more detailed description of the
competition between the heterotrophic and the autotrophic bacteria.
Table 6.2 shows the process matrix for the processes included in the calculations. It
concerns the growth and decay of the three groups of bacteria. Tables 6.3 and 6.4
show kinetic, stoichiometric and physical parameters for process and biofilm from
207