Table 1 The main parameters of the Karbala WWTP.
Parameter | Value |
|---|---|
Mainstream flowrate | 100,000 m3/day |
Volume of anaerobic tank | 8736 m3 |
Volume of anoxic tank | 14,112 m3 |
Volume of aeration tank | 54,054 m3 |
Surface area for primary clarifier | 3216 m2 |
Surface area for secondary clarifier | 6432 m2 |
Volume of sludge anaerobic digester | 13,600 m3 |
Surface area for gravity thickener | 400 m2 |
Surface area for belt mechanical thickener | 60 m2 |
Volume chlorination basin | 3000 m3 |
Surface area for drying bed | 50,000 m2 |
Dissolved oxygen | 2–3 mg/L |
Mixed liquor suspended solids | 2000–4000 |
Solid loading rate | 3.6Â kg mlss/m2/h |
Hydraulic loading rate | 15.5 m3/m2/day |
Wasted activated sludge | 3000–4000 m3/day |
Return activated sludge | 50,000–60,000 m3/day |
Food/microorganisms | 0.16 |
Internal recycle | 3 |
Sludge volume index | 85Â mL/g |
