Table 1.
Wastewater treatment plant characteristics.
| WWTP Name | Municipalities served (total population) | Average flow rate (m3d−1) | Population served | Primary sludge process details |
|---|---|---|---|---|
| Stamford | Stamford and Darien, CT (151,528) | 91 000 | 140 000 | Bar screens→primary clarifier→ de-gritting of primary sludge with hydrocyclones. Sample of thickened sludge collected after hydrocyclones. |
| Bridgeport West | Bridgeport, CT (144,900) | 120 000 | 105 000 | Bar screens→gravity thickener→primary clarifier. Sample collected at primary solids effluent pump. |
| New Haven | New Haven, Hamden, East Haven, Woodbridge, CT (228,862) | 151 000 | 200 000 | Bar screen→grit chamber→ primary clarifier→gravity thickener. Sample collected at effluent pump of gravity thickener. |
| Hartford, South Meadows | Hartford, West Hartford, Newington, Bloomfield, Wethersfield, CT (263,021) | 300 000 | 300 000 | Bar screen→grit chamber→ primary clarifier→gravity thickener. Sample collected at effluent pump of gravity thickener. |
| New London | New London and Waterford, CT (45,826) | 23 000 | 40 000 | Bar screen grit chamber→ primary sedimentation. Sample collected at primary solids pump. |
| Norwich | Norwich, Sprague, Franklin, Bozrah (46,495) | 32 000 | 22 500 | Bar screen→grit chamber→primary clarifier→gravity thickener. Sample collected at effluent pump from gravity thickener. |