|
Parameter
|
Added source of nitrogen
|
|---|
| |
No supplement
|
(NH
4
)
2
SO
4
|
(NH
4
)
2
CO
3
|
Urea
|
|---|
|
Supplied N
|
[mg/L]
|
0
|
106
|
146
|
117
|
|
NH4-N + urea-N
|
[mg/L]
|
7
|
113
|
153
|
124
|
|
Initial pH value
|
[−]
|
5.96
|
5.94
|
7.50
|
7.18
|
|
μ at t = 14 h
|
[h−1]
|
0.51
|
0.57
|
0.29
|
0.57
|
|
Final sugar
|
[g/L]
|
0.92
|
0.00
|
0.15
|
0.00
|
|
Final biomass
|
[g/L]
|
0.47
|
1.23
|
1.06
|
1.29
|
|
Final pH value
|
[−]
|
3.99
|
2.47
|
3.45
|
7.10
|
- The whey and the sources of nitrogen were autoclaved together; the data belong to the experiment shown in Figure 1; the final parameters were measured after a total of 40 h of cultivation.
