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Table 1

Physicochemical, microbiological, and parasitological characterization of digestates for the one- and two-phase configurations

Parameters	Substrate	C1	C2	Executive order 1287/14^a	USEPA (1995)
Physicochemical characterization
CEC (cmol/kg)	N.E.	20.75	51.80	N.E.	N.E.
TOC (g/kg)	39.46	37.18	39.47	N.E.	N.E.
TN (g/kg)	1.86	6.46	14.13	N.E.	N.E.
TP (g/kg)	0.2	7.23	10.58	N.E.	N.E.
NH₄⁺ (mg/L)	86	176	342	N.E.	N.E.
Cu (mg/kg)	<1.0	31.65	148.26	1750	1,500
Cd (mg/kg)	<1.0	0.11	0.22	40	39
Cr (mg/kg)	<1.0	11.19	52.75	1,500	1,200
Zn (mg/kg)	6.5	202.25	1,176.52	2,800	2,800
Hg (mg/kg)	<0.01	<0.01	<0.01	20	17
Mo (mg/kg)	<2.30	<2.30	2.30	75	75
Ni (mg/kg)	4.5	7.76	32.84	420	420
Pb (mg/kg)	<0.01	3.12	23.01	400	N.E
Se (mg/kg)	<0.01	<0.01	<0.01	100	36
Mg (g/kg)	9.61	5.11	7.20	N.E.	N.E.
Microbiological and parasitological characterization
FC (CFU100 mL)	N.D.	0	0	<2E + 6	<1,000
Samonella spp. (CFU/25 g)	N.D.	Absence	Absence	<1 E + 3	<3 NMP/4 g
HE (Egg Units/g)	N.D.	16	0	<10	1

Parameters	Substrate	C1	C2	Executive order 1287/14^a	USEPA (1995)
Physicochemical characterization
CEC (cmol/kg)	N.E.	20.75	51.80	N.E.	N.E.
TOC (g/kg)	39.46	37.18	39.47	N.E.	N.E.
TN (g/kg)	1.86	6.46	14.13	N.E.	N.E.
TP (g/kg)	0.2	7.23	10.58	N.E.	N.E.
NH₄⁺ (mg/L)	86	176	342	N.E.	N.E.
Cu (mg/kg)	<1.0	31.65	148.26	1750	1,500
Cd (mg/kg)	<1.0	0.11	0.22	40	39
Cr (mg/kg)	<1.0	11.19	52.75	1,500	1,200
Zn (mg/kg)	6.5	202.25	1,176.52	2,800	2,800
Hg (mg/kg)	<0.01	<0.01	<0.01	20	17
Mo (mg/kg)	<2.30	<2.30	2.30	75	75
Ni (mg/kg)	4.5	7.76	32.84	420	420
Pb (mg/kg)	<0.01	3.12	23.01	400	N.E
Se (mg/kg)	<0.01	<0.01	<0.01	100	36
Mg (g/kg)	9.61	5.11	7.20	N.E.	N.E.
Microbiological and parasitological characterization
FC (CFU100 mL)	N.D.	0	0	<2E + 6	<1,000
Samonella spp. (CFU/25 g)	N.D.	Absence	Absence	<1 E + 3	<3 NMP/4 g
HE (Egg Units/g)	N.D.	16	0	<10	1

^aClass B Classification; N.E.: Not established; N.D.: Not determined.