Biomedical Engineering Reference
In-Depth Information
(a)
(c)
10 2
XV/(YF X/S S F V 0 )
10
XV/(YF X/S S F V 0 ) , pseudo-steady state
1
10 1
XV/(YF X/S S F V 0 ) , pseudo-stead y sta te
SV/(S F V 0 )
0.1
SV/(S F V 0 ) , pseudo-steady state
XV/(YF X/S S F V 0 )
10 0
0
5
10
15
20
t
(b)
XV/(YF X/S S F V 0 ) , pseud o-steady state
10 1
SV/(S F V 0 )
10 -1
XV/(YF X/S S F V 0 )
10 0
SV/(S F V 0 ) , pseudo-ste ady st ate
10 -1
10 -2
10 -2
SV/(S F V 0 ) , pseudo-steady state
SV/(S F V 0 )
10 -3
0 2 4 6 8 0 2 4 6
0
5
10
15
20
t
t
(d)
(e)
10 1
10 1
XV/(YF X/S S F V 0 ) , pseudo-ste ady sta te
XV/(YF X/S S F V 0 )
XV/(YF X/S S F V 0 ) , pseudo-steady state
XV/(YF X/S S F V 0 )
10 0
10 0
SV/(S F V 0 )
10 -1
10 -1
SV/(S F V 0 ) , pseudo -steady s tate
10 -2
SV/(S F V 0 )
SV/(S F V 0 ) , pseudo-steady state
10 -2
0
2
4
6
8
10
0
2
4
6
8
10
12
14
16
t
t
FIGURE 13.10 Suitability of pseudo-steady state assumption for biomass production in the reactor at short
times with (a) a constant feed rate of Q
¼ m max V 0 and initial conditions of S 0 ¼
S F and X 0 ¼
1.05 YF X/S S F ; (b) an
exponential feed rate of Q
¼
0.1
m max V 0 exp(0.2
m max t ) and initial conditions of S 0 ¼
S F and X 0 ¼
1.05 YF X/S S F ;
(c) an exponential feed rate of Q
¼
0.1
m max V 0 exp(0.2
m max t ) and initial conditions of S 0 ¼
S F and X 0 ¼
0.0105 YF X/S S F ;
(d) an exponential feed rate of Q
¼
0.1
m max V 0 exp(0.2
m max t ) and initial conditions of S 0 ¼
0.0125 S F and X I ¼
1.05 YF X/
S S F ; (e) an exponential feed rate of Q
¼
0.1
m max V 0 exp(0.2
m max t ) and initial conditions of S 0 ¼
S F and X 0 ¼
0.0105 YF X/
S S F . In the last case (e), there is a death rate of k d ¼
0.1
m max . In all cases, the Monod saturation constant K S ¼
0.05 S F .
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