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Table 2 Characterizations of mixed substrates

From: Enhancing methane production using anaerobic co-digestion of waste activated sludge with combined fruit waste and cheese whey

Waste activated sludge: mixed fruit and cheese whey 100:0 95:5 90:10 85:15
COD (g/l) 52.1 ± 0.06 53.12 ± 0.06 54.78 ± 0.06 55.31 ± 0.06
SCOD (g/l) 4.020 ± 0.08 6.23 ± 0.11 7.12 ± 0.09 8.51 ± 0.21
VS (g/l) 33.12 ± 0.02 34.41 ± 0.82 34.91 ± 0.92 35.33 ± 0.82
VSS (g/l) 30.01 ± 0.06 28.91 ± 0.52 29.45 ± 0.61 30.27 ± 0.4
TS (g/l) 41.25 ± 0.02 42.68 ± 0.55 44.11 ± 0.71 44.72 ± 0.52
TSS (g/l) 36.8 ± 0.06 35.96 ± 0.72 35.21 ± 0.81 34.87 ± 0.83
pH 6.54 ± 0 6.51 ± 0 6.49 ± 0 6.46 ± 0
C/N 10 ± 0.2 13.5 ± 0.3 15.12 ± 0.25 16.33 ± 0.52
Alkalinity (mg CaCO3/l) 3050 ± 25 2651 ± 0.43 2570 ± 56 2450 ± 63