The seed sludge used in this experiment

Digester performance and process RO4929097 without and with supplementation of microelements and sulfate.ParameterUnita.1a.2Operation periodDay100–132 (33 days)187–225 (38 days)HRTDays1515OLRkg-COD/m3/d8.5 ± 0.488.2 ± 0.66Biogas productionL/L-digester/dunstable2.33 ± 0.14CH4%59 ± 0.1260 ± 0.82CO2%41 ± 1.4140 ± 0.88H2ppm402 ± 48.1385 ± 39.2EffluentpH/7.22 ± 0.117.38 ± 0.13TANg/L0.84 ± 0.230.95 ± 0.04Bicarbonate alkalinity (PA)g/L2.12 ± 0.422.43 ± 0.47Total alkalinity (TA)g/L4.15 ± 0.594.39 ± 0.51Inter. alkalinity (IA)g/L2.03 ± 0.191.96 ± 0.08IA/PA ratio/0.98 ± 0.140.83 ± 0.15IA/TA ratio/0.49 ± 0.030.45 ± 0.04VFAeffluent (range)Acetic acidg/L0.11–1.000.12–0.40Propionic acidg/L0.76–2.090.86–1.99Iso-butyric acidg/L0.14–0.400.09–0.41Butyric acidg/L0.07–0.08?0.14–0.24?Iso-valeric acidg/L0.14–0.380.10–0.43Valeric acidg/L0.10–0.210.16–0.44Total VFAg/L2.07–2.931.34–2.78TS removal%44 ± 3.6644 ± 4.10VS removal%49 ± 4.4349 ± 4.36COD removal%54 ± 2.2853 ± 3.05Biogas conv. efficiency%40 ± 4.6844 ± 2.94Hydrolysis%46 ± 5.6351 ± 3.67Acidogenesis%41 ± 5.1846 ± 3.39Methanogenesis%40 ± 4.6844 ± 2.94a.1: without supplementation of inheritance of acquired characteristics microelements and sulfate.a.2: with supplementation of microelements and sulfate.?Rarely detected.Full-size tableTable optionsView in workspaceDownload as CSV