Efficacies of Various Anaerobic Starter Seeds for Biogas Production from Different Types of Wastewater

Table 3

Order of 25 factorial experiments based on rate and ultimate time of methane production.

Number	Experiment	Ultimate CH4 production time (day)	CH4 production rate; (mL CH4/g VSS⋅d)	Lag time (days)
1	CSsRBw	7	12.37	0
2	SWsRBw	8	8.32	0
3	POsRBw	9	8.95	0
4	SMsPOw	12	4.51	0
5	CSsPOw	14	7.36	0
6	SMsRBw	14	7.08	0
7	SMsSMw	14	6.94	0
8	CSsCSw	14	6.21	0
9	RBsRBw	17	5.91	0
10	POsPOw	17	4.77	0
11	POsCSw	17	4.35	0
12	CSsSMw	20	6.38	0
13	RBsPOw	20	5.37	0
14	RBsSMw	20	5.03	0
15	CSsSWw	20	3.37	0
16	SMsCSw	22	4.78	6
17	POsCSw	22	4.13	3
18	POsSWw	22	2.38	0
19	SWsCSw	24	3.86	0
20	SWsPOw	24	3.74	0
21	SWsSMw	24	2.69	0
22	RBsCSw	30	3.92	4
23	RBsSWw	30	3.01	0
24	SWsSWw	30	2.65	0
25	SMsSWw	32	1.71	0

Selected combinations of different starter seed and wastewater for next phase.