Dependent | Independent | Sample size ( n) | Correlation coefficient ( r) | Correlation coefficient squared (r2) | p Value | ||
---|---|---|---|---|---|---|---|
Parameter | Measuring point | Parameter | Measuring point | ||||
Esterase activity (IU/mL) | Basin 1 + 2 | Methane content (vol.%;) | Methane reactor | 12 | 0.87 | 0.76 | 2.44 × 10−4 |
Effluent of the percolator, basin 1 + 2 | COD (mg/L) | Effluent of the percolator, basin 1 + 2 | 184 | 0.84 | 0.71 | 1.64 × 10−50 | |
Input | Age of the silage (month) | Input | 8 | −0.89 | 0.79 | 6.28 × 10−4 | |
Aminopeptidase (IU/mL) | Input | Age of the silage (month) | Input | 6 | −0.82 | 0.68 | 4.35 × 10−2 |
Input | Cumulative COD yield (mg/L) | Effluent of the percolator | 6 | 0.94 | 0.88 | 5.76 × 10−3 | |
Cellulase (IU/mL) | Input | Cumulative COD yield (mg/L) | Effluent of the percolator | 6 | 0.87 | 0.76 | 2.43 × 10−2 |