Table 1.
Overview of the number of bacterial OTUs that show a significant (P < 0.05) correlation with the operational parameters, based on the Kendall rank correlation coefficient. Only bacterial OTUs with a significant (P < 0.05) difference between DNA and RNA (203 OTUs in total) were considered
| Parameter | DNA | RNA |
|---|---|---|
| pH | 5 | 7 |
| Temperature | 44 | 29 |
| TAN | 40 | 62 |
| Free ammonia | 8 | 16 |
| Conductivity | 35 | 43 |
| Na+ | 41 | 7 |
| K+ | 0 | 0 |
| Total VFA | 1 | 2 |
| Acetate | 0 | 0 |
| Propionate | 0 | 0 |
| Butyrate | 0 | 0 |
| SRT | 1 | 0 |
TAN total ammonia nitrogen, VFA volatile fatty acids, SRT sludge retention time