Table 9 Characterization of substrates used for semi-continuous biogas production (average ± standard deviation) [26]

7.4 ± 0.2^a

4.8 ± 0.2^a

6.2 ± 0.2^e

0.52 ± 0.06^b

1.95 ± 0.22^c

2.07 ± 0.25^f

59.6 ± 7.69^b

67.69 ± 10.25^c

68.12 ± 13.04^f

8611 ± 1664^b

41,783 ± 11,185^c

23,200 ± 3726^f

2371 ± 477^b

6544 ± 957^c

8748 ± 2714^f

1753 ± 248^b

323 ± 136^c

917 ± 312^f