Table 3.
The average percentage effectiveness of EM activity and the average time of EM activity in reducing the value of microbiological parameters in the analyzed water test points of the Turawa reservoir
| Parameters | Description | Microbiological parameters | ||||
|---|---|---|---|---|---|---|
| HBN22 | HBN36 | CBN | FCBN | FEN | ||
| Average percentage effectiveness of EM at test points | 1 (30 cm) | − 60.55% | − 38.21% | 40.00% | − 19.39% | − 37.91% |
| 1 (100 cm) | − 73.13% | 17.96% | 0.00% | 28.57% | 89.96% | |
| 2 ( 30 cm) | − 47.50% | − 92.13% | − 72.18% | − 65.99% | − 86.38% | |
| 2 (100 cm) | 99.16% | 62.45% | − 76.77% | − 72.18% | − 79.23% | |
| 3 (30 cm) | − 63.76% | − 67.73% | − 13.89% | − 79.59% | − 37.74% | |
| 3 (100 cm) | − 71.22% | − 60.71% | − 88.97% | − 73.16% | − 80.66% | |
| Overall1 | − 58.38% | − 48.88% | − 46.44% | − 47.22% | − 55.77% | |
| Average duration of action of EM in total in reducing parameter values2 | Days | 19.52 | 19.67 | 34.13 | 30.47 | 17.64 |
| Hours | 468.5 | 472.1 | 819.2 | 731.3 | 423.4 | |
| Minutes | 28,110 | 28,323 | 49,152 | 43,878 | 25,401 | |
| Mann–Whitney U test | U-value | 65.5 | 84.0 | 77.5 | 74.5 | 55.0 |
| z-score | 3.03731 | 2.35199 | 2.65764 | 2.75256 | 3.36951 | |
| P | 0.00236 | 0.01428 | 0.00782 | 0.00596 | 0.00076 | |
Italics — statistically significant values for p ≤ 0.05
1Mean value for individual parameters from the series immediately before and after the application of EM