Table 2: The biogas production at different HRTs (average concentrations at steady-states).

HRTBiogas production (L/d)Methane production (L/d)Methane percentage (%)Methane yield (m3 CH4/kg·CODremoved)

2410.74 ± 0.397.60 ± 0.2670.9 ± 0.30.309 ± 0.014
1814.00 ± 0.7810.29 ± 0.5773.5 ± 2.10.327 ± 0.028
1221.49 ± 1.2614.88 ± 1.5769.3 ± 1.60.316 ± 0.022