Table 3.
Concentration of SARS-CoV-2 and NoV GII in WWTP influent measured with passive sampling and composite sampling.
| SARS-CoV-2 |
NoV GII |
|||
|---|---|---|---|---|
| Date of sampling | Passive sampling |
Composite sampling |
Passive sampling |
Composite sampling |
| (Log gc /100cm2) | (Log gc /100 ml) | (Log gc /100cm2) | (Log gc /100 ml) | |
| 24-Nov-2020 | 1.7 | 4.1 | 1.2 | 3.2 |
| 25-Nov-2020 | 1.6 | 3.8 | 2.7 | 4.7 |
| 26-Nov-2020 | 1.8 | 4.4 | 2.8 | 4.6 |
| 27-Nov-2020 | 2.2 | 4.3 | 2.0 | 5.1 |
| 28-Nov-2020 | 2.2 | 4.0 | <LD | 5.2 |
| 29-Nov-2020 | 1.5 | 4.1 | 1.9 | 4.7 |
| 30-Nov-2020 | 1.4 | 4.1 | <LD | 4.6 |
| 1-Dec-2020 | 1.4 | 4.2 | <LD | 4.5 |
| 2-Dec-2020 | 1.6 | 3.8 | 2.3 | 4.5 |
| 3-Dec-2020 | 1.4 | 4.1 | 1.7 | 4.9 |
| 4-Dec-2020 | 2.4 | 3.9 | ND | 5.0 |
| 5-Dec-2020 | 2.8 | 4.0 | ND | 4.8 |
| 6-Dec-2020 | 1.8 | 3.9 | ND | 4.3 |
| 7-Dec-2020 | 2.4 | 3.7 | ND | 4.6 |
| 8-Dec-2020 | 2.4 | 3.9 | ND | 4.7 |
| 9-Dec-2020 | 2.3 | 4.2 | ND | 4.5 |
| 10-Dec-2020 | 2.6 | 4.1 | 1.9 | 4.1 |
| 11-Dec-2020 | 2.8 | 4.0 | 2.7 | 4.7 |
| 12-Dec-2020 | 3.0 | 4.0 | 1.8 | 4.1 |
| 13-Dec-2020 | 2.4 | 3.7 | <LD | 3.9 |
| 14-Dec-2020 | 3.2 | 4.1 | 1.4 | 4.0 |
| mean ± SD | 2.1 ± 0.5 | 4 ± 0.2 | 2.03 ± 0.5*** | 4.51 ± 0.4 |
| Frequency of detection (%) | 100 | 100 | 76.2 | 100 |
Nylon membrane (100 cm2) were immersed in the influent of a WWTP during 24 h from the 24/11/2020 to 14/12/2020; composite sampling: 24 h composite sample of raw wastewater. LD: limit of detection; ND: not determined. ANOVA was followed by Tukey's multiple comparisons test: ***p < 0.001.