Table 2 Production of biogas and concentrations of methane and selected trace gases from the pilot AD reactor at organic loads of 3 (M1, M3) and 5–8 (M2, M4) kgVS m ^-3

Biogas^*) Ndm³/kgVS_fed

646 +/− 47

586 +/− 30

632 +/− 76

496 +/− 71

Methane (%, min-max)

52.3 – 66.0

46.0 – 70,9

51.7 – 68.0

nd

Trace gases

Ammonia, NH₃ (ppm)

< 3

< 3

83

38

H₂S (ppm)

< 0.1

< 0.1

nd

< 10

DMS (ppm)

< 0.2

< 0.2

nd

< 5

EtOH (ppm)

10

125

2380

2230