Table 5.
Spearman's rho correlation between the detected methanogen groups and the monitored control parameters
| pH | Ac/Alc ratio | % TVS added | Biogas production (m3/kg VS added) | msar (gene copies/μl) | msa (1/Ct) | |
|---|---|---|---|---|---|---|
| msar (gene copies/μl) | 0.630** | -0.589** | 0.744** | 0.673** | 1 | 0.782** |
| msa (1/Ct) | 0.847** | - | 0.641* | 0.576* | 0.782** | 1 |
| mcp (1/Ct) | - | - | 0.449* | - | 0.719** | 0.868** |
Significant correlation at p < 0.05 is identified with a single asterisk while highly significant at p < 0.01 with a double asterisk. The hyphen is introduced when no significant correlations (n.c.) were observed.