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

Applied Biological Chemistry

Table 7 Comparative other studies on biogasification of sewage sludge and food waste (leachate)

Sample	Methane yield (Sm³CH₄/kgVS)	Temp (^oC)	HRT (day)	C/N ratio	Removal efficiency of VS (%)	Reference
Municipal wastewater sludge (1)	0.232	35	24	6.7	–	Kim et al. [29]
Municipal wastewater sludge (2)	0.181	35	24	5.0	–
Wastewater sludge with food waste leachate	0.396	35	24	8.3	–
Sewage sludge with food waste leachate (1:9)	0.233	55	30	6.0	72.5	Lee et al. [7]
Sewage sludge with food waste leachate (3:7)	0.298	55	30	7.4	84.3
Sewage sludge with food waste leachate (5:5)	0.344	55	30	9.4	89.0
Sewage sludge	0.180	35	30	–	47.6	Byun et al. [30]
Sewage sludge with food waste leachate (5:5)	0.223	35	30	–	63.4	Byun et al. [30]
Sewage sludge	0.186	35	–	–	35.4	Kim et al. [31]
Sewage sludge with food waste (0.87:0.13)	0.201	35	–	–	39.9	Kim et al. [31]
Sewage sludge only	0.262	Mesophilic	28	7.3	38.7	This study
Sewage sludge mixing with food waste leachate	0.478	Mesophilic	30	9.1	59.6	This study