This preview shows pages 1–3. Sign up to view the full content.
Carbonaceous Oxygen Demand
C
a
H
b
O
c
N
d
+
1
2
2
a
+
1
2
b
!
3
d
( )
!
c
"
#
$
%
’
O
2
(
aCO
2
+
1
2
b
!
3
d
( )
H
2
O
+
dNH
3
Nitrogenous Oxygen Demand
dNH
3
+
2
dO
2
(
dNO
3
!
+
dH
2
O
+
dH
+
Biological Oxygen Demand (BOD)
BOD L
( ) =
L
0
e
!
k
1
t
BOD Y
( ) =
L
0
1
!
e
!
k
1
t
( )
where
L
0
=
ultimate BOD concentration [mg/L]
BOD L
( ) =
BOD remaining at time = t [mg/L]
BOD Y
( ) =
O
2
consumed during time = t [mg/L]
k
1
=
1st order BOD decay rate coefficient [1/day]
t = time
Substrate utilization kinetics
!
dS
dt
X
=
kS
K
S
+
S
where
S
=
substrate concentration
mass
vol
"
#
$
%
k
=
maximum rate of substrate utilizaton
1
time
"
#
$
%
K
s
=
half velocity constant
mass
vol
"
#
$
%
t
=
time
X
=
biomass concentration
mass
vol
"
#
$
%
Useful Equations
CEE 3510 Spring 2010
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document PFR to model BOD degradation in river with no longitudinal mixing
L
=
L
0
e
!
k
r
x
u
k
r
=
k
1
+
k
3
where
k
r
=
BOD removal rate coefficient in the river
k
1
=
BOD degradation rate coefficient in the river
k
3
=
BOD sedimentation rate coefficient
This is the end of the preview. Sign up
to
access the rest of the document.
This note was uploaded on 05/15/2010 for the course CEE 3510 taught by Professor Lion during the Spring '10 term at Cornell University (Engineering School).
 Spring '10
 Lion
 Kinetics

Click to edit the document details