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Table 1 Characterizations of the inoculum and mixed sludge used in this study

From: Improvement of anaerobic digestion of sewage mixed sludge using free nitrous acid and Fenton pre-treatment

Characterization

COD (g/L)

SCOD (g/L)

TS (g/L)

TSS (g/L)

VS (g/L)

VSS (g/L)

pH

Inoculum

38.2 ± 0.1

3.25 ± 0.01

31.6 ± 0.3

26.8 ± 0.3

25.1 ± 0.2

21.8 ± 0.3

7.65 ± 0.01

Mixed sludge

48.5 ± 0.2

4.25 ± 0.02

39.5 ± 0.4

35.7 ± 0.4

31.5 ± 0.4

29.1 ± 0.2

6.32 ± 0.02