Table A6.

Pearson’s correlation coefficients for the technological effects of WAS ultrasonic disintegration (inoculum + WAS_B).

Variables	pH	TS	VS	NTOT	PTOT	CST	Biogas
pH	−0.02	−0.11	−0.32	−0.19	−0.75 **	−0.31	−0.43
TS	−0.64	0.99 *	0.93 *	0.88 *	0.29	0.78 *	0.76 *
VS	−0.63	0.97 *	0.99 *	0.92 *	0.50	0.87 *	0.89 *
NTOT	−0.16	−0.26	−0.51	−0.49	−0.94 *	−0.62	−0.76 *
PTOT	0.17	0.15	0.41	0.31	0.91 *	0.57	0.63
CST	0.28	−0.81 *	−0.92 *	−0.94 *	−0.72 **	−0.88 *	−0.93 *

* bold—significant correlations, p < 0.05; ** non−significant correlations taken into account in statistical analysis (r ≥ 0.65); Biogas—total biogas production; TS—total solids; VS—volatile solids; N_TOT—total nitrogen; P_TOT—total phosphorus; CST—capillary suction time.