Table 1 Feedstock and initial characteristics of piles for the different batches

pH (1:5)

6.8

0.4

9.6

0.3

8.8^a

9.2^a

9.0^a

EC (1:10) (ms/cm)

3.34

1.30

6.59

2.81

4.06^a

5.24^a

5.07^a

Total N (%)

2.67

1.02

1.36

0.26

2.04^a

1.54^a

1.55^a

NH₄-N (mg/kg)

1513.91

255.60

652.64

290.80

232.34^a

192.83^a

336.55^a

NO₃-N (mg/kg)

1232.64

917.30

612.34

69.34

366.79^a

380.52^a

501.08^a

Org. C (%)

26.56

6.30

37.85

5.65

22.25^b

35.78^a

36.02^a

Total P (%)

3.77

1.14

0.43

0.08

2.93^a

1.92^a

1.98^a

Avail. P (mg/Kg)

9.88

0.65

11.46

1.75

9.95^a

9.93^a

5.26^b

Total K (%)

0.63

0.14

0.93

0.06

1.34^a

1.17^a

1.83^a

Avail. K (mg/Kg)

0.13

0.03

6.34

2.74

0.33^a

0.25^a

0.40^a

Ca (%)

2.53

0.38

0.76

0.32

3.52^a

2.14^a

2.66^a

Mg (%)

0.64

0.28

0.29

0.09

0.33^a

0.32^a

0.36^a

Mn(mg/Kg)

36.82

2.38

17.56

8.70

14.01^a

15.14^a

19.72^a

Cu(mg/Kg)

18.25

1.99

2.58

0.46

4.86^a

4.78^a

3.68^a

Zn(mg/Kg)

350.22

81.75

906.39

293.50

422.57^a

617.82^a

474.49^a

Fe(mg/Kg)

566.24

62.34

333.35

105.40

289.03^a

283.32^a

257.73^a

Pb(mg/Kg)

106.10

6.49

77.47

17.68

55.72^a

78.92^a

78.12^a

Cd(mg/Kg)

2.38

1.17

4.93

1.05

5.84^a

3.31^a

5.29^b

Cr(mg/Kg)

63.58

14.29

159.81

11.23

57.56^a

57.18^a

62.81^a

Hg(mg/Kg)

0.01

0.01

0.82

0.11

0.24^a

0.52^a

0.46^a

Ni(mg/Kg)

0.23

0.03

0.47

0.32

0.05^a

0.08^a

0.03^a

Se (mg/Kg)

0.18

0.06

0.36

0.09

0.09^a

0.12^a

0.03^a

E. coli (CFU/g)

8.1 x 10³

1.1 x 10⁴

1.3 x 10³

8.0 x 10²

5.2 x 10^4a

6.9 x 10^6a

1.7 x 10^7a

Total coliform (CFU/g)

9.6 x 10⁴

1.3 x 10⁵

3.3 x 10³

2.4 x 10³

3.8 x 10^5b

6.7 x 10^7a

6.0 x 10^7a