Digester Feed |
60% Raw Sludge, 40% Activated Sludge |
Digester Number |
1 |
3 |
5 |
Parameters |
Digester capacity (m3) |
7433 |
7433 |
7433 |
pH |
7.13 -7.5 |
7.27-7.55 |
7.36 |
Temperature(0C) |
34 |
34 |
34 |
Digester feeding per day (m3) |
2248 |
2148 |
2552 |
Solid retention time (days) |
16 |
16 |
14 |
Up flow velocity (m3/hr) |
120 |
120 |
120 |
Hydraulic Retention Time (HRT) (days) |
3.3 |
3 |
2.91 |
Organic loading rate (kg. oDS / m3.d) |
6.84 |
5.84 |
6.61 |
Dry solid (%) |
2.91-3.34 |
2.56-5.74 |
2.79-3.54 |
Volatile solids (%) |
70.27-70.95 |
43.75-70.15 |
54.54-67.49 |
Volatile fatty acid |
165-195 |
168-205 |
145.5-195 |
Alkalinity |
3014-3451 |
2992-3512 |
2893-3190 |
Dissolved sulfide (mg/L) |
37.2-38 |
32.4-37.2 |
26.4-27.6 |