Table 2.
Reduction efficiencies of advanced wastewater treatment technologies on taxonomic and antibiotic resistance gene markers.
| Target | Control | UV treatment | Ozone treatment | Combination | |||
|---|---|---|---|---|---|---|---|
| Absolute abundance | Absolute abundance | Reduction (–) | Absolute abundance | Reduction (–) | Absolute abundance | Reduction (–) | |
| Increase (+) | Increase (+) | Increase (+) | |||||
| [Cell equivalents/ 100 mL] | [Cell equivalents/ 100 mL] | [%] | [Cell equivalents/ 100 mL] | [%] | [Cell equivalents/ 100 mL] | [%] | |
| 16S | 2.94E+08 | 9.04E+07 | −69.3% | 4.65E+06 | −98.4% | 5.47E+06 | −98.1% |
| 23S | 6.27E+03 | 3.61E+03 | −42.4% | 1.91E+01 | −99.7% | 9.92E+01 | −98.4% |
| ecfx | 9.89E+01 | 7.50E+01 | −24.1% | 0.00E+00 | < LOD | 0.00E+00 | < LOD |
| yccT | 1.50E+04 | 1.09E+04 | −27.4% | 1.14E+02 | −99.2% | 1.57E+02 | −99.0% |
| mecA | 4.70E+01 | 0.00E+00 | < LOD | 0.00E+00 | < LOD | 0.00E+00 | < LOD |
| ctxM32 | 1.50E+04 | 5.05E+04 | 236.3% | 2.17E+03 | −85.5% | 2.38E+03 | −84.1% |
| ermB | 5.37E+04 | 3.75E+04 | −30.2% | 1.01E+03 | −98.1% | 1.07E+03 | −98.0% |
| blaTEM | 1.22E+05 | 1.83E+05 | 50.1% | 1.10E+04 | −91.0% | 1.12E+04 | −90.8% |
| sul1 | 1.33E+06 | 9.33E+05 | −29.9% | 6.83E+04 | −94.9% | 5.53E+04 | −95.8% |
| intl1 | 4.42E+05 | 2.43E+05 | −44.9% | 2.34E+04 | −94.7% | 4.61E+03 | −99.0% |
The abundances and reduction efficiencies of conventional treated wastewater (control), UV treated wastewater at 400 J/m2 (UV treatment), ozone treated wastewater with 1 g ozone/g DOC (ozone treatment) and the combination of UV and ozone treatment (combination) are illustrated.