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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