TABLE 24.6.
Average Removal of Pathogen and Indicator Microorganisms in a Wastewater Treatment Plant, St. Petersburg, Florida
| Raw wastewater to secondary wastewater | Secondary wastewater to postfiltration | Postfiltration to postdisinfection | Postdisinfection to poststorage | Raw wastewater to Poststorage | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Percentage | log10 | Percentage | log10 | Percentage | log10 | Percentage | log10 | Percentage | log10 | |
| Total coliforms | 98.3 | 1.75 | 69.3 | 0.51 | 99.99 | 4.23 | 75.4 | 0.61 | 99.999992 | 7.1 |
| Fecal coliforms | 99.1 | 2.06 | 10.5 | 0.05 | 99.998 | 4.95 | 56.8 | 0.36 | 99.999996 | 7.4 |
| Coliphagea | 82.1 | 0.75 | 99.98 | 3.81 | 90.05 | 1.03 | 90.3 | 1.03 | 99.999997 | 6.6 |
| Enterovirus | 98.0 | 1.71 | 84.0 | 0.81 | 96.5 | 1.45 | 90.9 | 1.04 | 99.999 | 5.0 |
| Giardia | 93.0 | 1.19 | 99.0 | 2.00 | 78.0 | 0.65 | 49.5 | 0.30 | 99.993 | 4.1 |
| Cryptosporidium | 92.8 | 1.14 | 97.9 | 1.68 | 61.1 | 0.41 | 8.5 | 0.04 | 99.95 | 3.2 |
a
Escherichia coli host ATCC 15597.