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Table 1 Summary of significant correlations and corresponding statistical values

From: Enzymatic monitoring and control of a two-phase batch digester leaching system with integrated anaerobic filter

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