Table 3 Physiochemical characteristics of sidestreams in Karbala WWTB.
Parameters | Floatation gravity thickener | Underflow mechanical thickener | Centrate | Total sidestreams |
|---|---|---|---|---|
Flowrate (m3/day) | 83 | 3000 | 518 | 3904 |
TSS (mg/L) | 4463 | 372 | 1185 | 508 |
BOD5 (mg/L) | 3037 | 99 | 144 | 250 |
COD (mg/L) | 6479 | 338 | 951 | 524 |
NO3 (mg/L) | 0 | 8.6 | 0 | 13 |
NO2 (mg/L) | 0 | 0.4 | 0 | 0.4 |
NH4 (mg/L) | 28 | 0.5 | 690 | 150 |
PO4-P (mg/L) | 5 | 0.7 | 1065 | 50 |
H2S (mg/L) | 40 | 0 | 600 | 100 |
Alkalinity (mg/L) | 325 | 143 | 7067 | 976 |
TP (mg/L) | 22 | 33 | 1109 | 72 |
DO (mg/L) | 0 | 1 | 0 | 0.85 |
