Design of denitrifying plants
(
y = 2 - SNo = 12 g/m 3
J
3
s· N2
g/m3
V::' "' "rn' ' "
\
saturation - - 20
---- criterium
-
SNO < 6 g/m3
equilibrium with -16
the atmosphere
3
0
I
Fig 7.21 Concentration distribution of dissolved nitrogen in a denitrifying biofilm. In the
interface, there is equilibrium with the atmosphere. For nitrate concentrations in the
free water of more than 6 g N03--N!m 3 , super-saturation occurs /8/.
Fig 7.22 Bubbles in the interface between carrier and biofilm due to super-saturation with free
nitrogen in the biofilm /8/.
256