Table 2 Final characterisation of batches of FS and FW co-composting

pH (1:5)

8.7^a

7

8.9^a

7

8.9^a

2

EC (1:10) (mS/cm)

5.3^a

15

6.3^b

2

6.4^c

2

Total N (%)

1.0a

20

1.3^a

3

1.7^b

12

NH₄-N (%)

0.13^a

8

6.65^b

7

7.04^b

5

NO₃-N (%)

0.12^a

8

11.17^b

76

6.69^b

3

Org. C (%)

13.6^a

7

14.2^a

23

12.2^a

8

Total P (%)

1.8^a

11

1.3^a

31

1.3^a

8

Total K (%)

1.8^a

11

3.0^b

17

2.6^b

8

Avail. K (mg/Kg)

0.14^a

14

0.19^a

111

0.48^b

2

Ca (%)

0.96^a

25

1.59^a

52

3.13^b

6

Mg (%)

0.33^a

24

0.57^a

40

0.56^a

9

Mn (mg/Kg)

14.94^a

18

23.08^b

18

24.06^b

5

Cu (mg/Kg)

6.21^a

38

7.07^a

22

6.98^a

15

300.0

70.0

Zn (mg/Kg)

531.46^a

17

701.08^a

29

500.87^a

8

600.0

200.0

Fe (mg/Kg)

289.32^a

4

307.89^a

24

273.56^a

4

Pb (mg/Kg)

66.72^a

15

64.61^a

40

71.28^a

7

40.0

25.0

Cd (mg/Kg)

6.08^a

18

4.80^b

45

3.12^bc

43

1.3

0.7

Cr (mg/Kg)

66.27^a

14

55.99^a

17

54.00^a

10

60.0

70.0

Hg (mg/Kg)

1.08^a

12

0.37^a

65

0.33^a

21

0.45

0.40

Ni (mg/Kg)

0.01^a

0

0.04^a

125

0.04^a

50

Se (mg/Kg)

0.02^a

0

0.09^a

44

0.06^a

33