Experimental Study of Biodegradation of Ethanol and Toluene Vapors

The uncertainty values of parameters obtained above are shown in Tables 5-1 and 5-2
for the parameters of ethanol and benzyl alcohol as sole substrate, respectively.
5.4 Modeling of Continuous Bioremediation
5.4.1 Modeling of Continuous Ethanol Bioremediation at Steady State
The relationship between the flows of ethanol and biomass under the continuous
steady state conditions, can be derived from Equation (5-17):
φ ⋅ = ( −φ
) + C
(5-42)
e
max
Y
ex
x
me,
c
x
where
m
e , c
is the maintenance factor at steady state conditions for ethanol
bioremediation. The flows of ethanol and biomass are represented by Equation (5-42a)
and (5-42b):
Q( yin
− yout
) F(
Ce0 Ce
)
φ −
e
=
+
(5-42a)
V
V
−
F( C − C ) 0
x x
φ
x
=
=
V
μC
x
(5-42b)
The biomass concentration in the reactor operating under steady state continuous
conditions, can then be obtained by coupling Equation (5-42) with Equations (5-42a)
and (5-42b):
C
x
φ ⋅Y
= μ
max
e ex
( + me,
c
)
(5-43)
In Equation (5-43) φ e
, C x and μ were directly measured during the continuous
m
e , c
bioremediation of ethanol. By applying these experimental results (Figure 5-7), was
found to be 0.010 ± 0.001 (C-mol/C-mol-h). The maintenance required for growth on
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