|
Phase conditions
|
Phase I
|
Phase II
|
Phase III
|
Phase IV
|
Phase V
|
Phase VI
|
|---|
|
Hydraulic retention time (h)
|
46.3
|
42.5
|
45.4
|
∞
|
90.5
|
87.8
|
|
Phase duration (days)
|
0–17
|
17–20
|
20–38
|
38–45
|
45–71
|
71–104
|
|
pH influent
|
7.0
|
5.8
|
5.8
|
5.8
|
5.8
|
5.8
|
|
pH reactor
|
6.9 ± 0.1
|
6.1 ± 0.2
|
5.8 ± 0.1
|
5.8 ± 0.0
|
5.7 ± 0.1
|
5.8 ± 0.1
|
|
CO2 supply (mL/min)
|
0
|
0
|
0.18
|
0.36
|
0.36
|
0.36
|
|
Methanol in influent (mM)
|
250
|
250
|
250
|
–
|
250
|
400
|
- The changed parameters are indicated in italic
- The pH in the reactor was controlled during phase II to phase VI. The methanol concentration of the influent was increased from 250 mM to 400 mM in phase VI. The reactor was in batch mode during phase IV
