| |
Daysa
|
F1
|
F2
|
F3
|
F4
|
F5
|
F6
|
|---|
|
Specific biogas production (ml g−1VSinput)
|
0–75
|
620 ± 55
|
645 ± 65
|
650 ± 60
|
645 ± 65
|
655 ± 65
|
680 ± 60
|
|
76–132
|
540 ± 20
|
580 ± 30
|
585 ± 40
|
525 ± 35
|
530 ± 35
|
550 ± 20
|
|
133–218
|
525 ± 65
|
570 ± 100
|
500 ± 100
|
505 ± 60
|
450 ± 90
|
575 ± 60
|
|
Methane (% of biogas)
|
0–75
|
61 ± 0
|
61 ± 0
|
61 ± 0
|
61 ± 1
|
63 ± 1
|
63 ± 0
|
|
76–132
|
63 ± 1
|
62 ± 2
|
62 ± 3
|
64 ± 1
|
62 ± 4
|
64 ± 1
|
|
133–218
|
61 ± 1
|
62 ± 1
|
61 ± 1
|
63 ± 1
|
62 ± 1
|
63 ± 1
|
|
Gaseous H2S (ppm)
|
0–75
|
< 20
|
< 20
|
< 20
|
< 20
|
< 20
|
< 20
|
|
76–132
|
< 20
|
< 20
|
< 20
|
280 ± 100
|
310 ± 115
|
250 ± 105
|
|
133–218
|
< 20
|
< 20
|
< 20
|
510 ± 100
|
440 ± 70
|
470 ± 60
|
|
Total solids (% of total weight)
|
0–75
|
2.1 ± 0.2
|
1.9 ± 0.2
|
2.1 ± 0.2
|
2.1 ± 0.2
|
2.1 ± 0.2
|
2.1 ± 0.2
|
|
76–132
|
2.1 ± 0.1
|
2.2 ± 0.1
|
2.1 ± 0.1
|
2.3 ± 0.1
|
2.3 ± 0.2
|
2.3 ± 0.2
|
|
133–218
|
2.0 ± 0.2
|
2.1 ± 0.2
|
2.2 ± 0.3
|
2.2 ± 0.3
|
2.4 ± 0.2
|
2.2 ± 0.0
|
|
Volatile solids (% of TS)
|
0–75
|
62 ± 1
|
62 ± 1
|
63 ± 1
|
63 ± 1
|
62 ± 2
|
63 ± 1
|
|
76–132
|
61 ± 1
|
61 ± 1
|
62 ± 2
|
58 ± 2
|
57 ± 4
|
58 ± 2
|
|
133–218
|
62 ± 0
|
63 ± 1
|
65 ± 3
|
57 ± 1
|
59 ± 3
|
56 ± 0
|
- aDays 0-75: start-up phase; Day 76: start of sulfide addition to F4, F5, and F6; Day 133: start of LCFA addition to F2, F3, F4, and F5
