Biogas potential and methanogenic community shift in in-situ anaerobic sewage sludge digestion with food waste leachate additions

Applied Biological Chemistry

Table 5 Theoretical methane yield in target biogasification facilities based on the nutrient contents

Sample^a	Mass per composition in samples (g/100)			Molar ratio^b	Mass ratio	Theoretical methane yield (Sm³CH₄/kgVS)
Sample^a	Protein	Fat	Carbohydrate	Molar ratio^b	Mass ratio	Theoretical methane yield (Sm³CH₄/kgVS)
SD1	1.26	0.70	0.82	0.66: 0.04: 0.30	0.45:0.25:0.30	0.496
CD1	2.06	1.15	0.64	0.78: 0.05: 0.17	0.54:0.30:0.16	0.511
CD2	1.09	1.68	0.98	0.55: 0.11: 0.34	0.29: 0.45: 0.26	0.524
CD3	2.01	1.62	1.92	0.56: 0.06: 0.38	0.36: 0.29: 0.35	0.496
Average	1.61	1.28	1.09	–	–	0.507

CD: Combined anaerobic digestion facility treating sewage sludge and food waste (leachate)
^aSD: Anaerobic digestion facility treating sewage sludge only
^bThe average molar ratio by components of food waste extracted in biogasification facilities was applied