Table 5
Process | F/M Ratio mg BOD 5/d/mg MLVSS | Volumetric Loading kg BOD / m3/d (lbs. BOD /1000 ft3/d) | MLSS mg/1 |
Conventional | 0.2 - 0.5 | 0.6 (40) | 1,000 - 3,000 |
Step Aeration | 0.2 - 0.5 | 0.6 (40) | 2,000 - 3,500 |
Complete Mix | 0.2 - 0.6 | 0.8 (50) | 3,000 - 5,000 |
Contact-Stabilization | 0.2 - 0.6 | 0.8a (50) | 1,000 - 3,000b 4,000 - 10,000c |
Extended Aeration | 0.05 - 0.15 | 0.25 (15) | 3,000 - 5,000 |
footnotes: | a) total aeration | capacity | |
b) contact tank | |||
c) reaeration tank |
Table 6
Minimum | Maximum | |
Conventional | 15 | 75 |
Step aeration | 20 | 75 |
Contact stabilization | 50 | 150 |
Extended aeration | 50 | 200 |
Complete mix | 20 | 75 |
Wis. Admin. Code Department of Natural Resources NR 110.21