Performance comparison of two anammox reactors:SBR and UBF

摘要

The performance of two selected high rate anammox reactors,i.e.sequencing batch reactor (SBR) and an upflow biofilter (UBF) were compared operating them simultaneously at 30 °C.The sludge from anaerobic digester of a municipal wastewater treatment plant was used for inoculation and synthetic wastewater was fed to both reactors during the experiment.During start-up,the nitrogen loading rate (NLR) was increased gradually from an initial 140 to 560 mg/1 day.The comparison of the performance revealed that the NLRs of SBR (2.7 g/1 day) and UBF (2.5 g/1 day) were far higher than those of the traditional nitrification/denitrification process.The biomass production of SBR outcompeted that of UBF.SBR took a longer time for start-up,i.e.about 57 days compared with 31 days of UBF.Moreover,SBR tolerated smaller pulse of substrate concentration and hydraulic load,showing a weaker stability compared with UBF.