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Two anoxic/oxic sequencing batch reactors (A/O SBRs) were operated to investigate the effects of step-feed on granulation processes and performances of partial nitrifying granules (PNG). R1 was operated in a traditional single-feed mode, while a two-step-feed strategy was used in R2. Results showed that R1 had a faster granulation process and better performance in maintaining partial nitrification...
This study investigated the effects of dissolved oxygen (DO) and reflux ratio on the performance of nitrogen removal in a lab-scale bio film-A/O reactor. Results showed that higher DO and reflux ratio was favorable for nitrification in aerobic reactor, but was adverse for denitrification in anaerobic reactor. Under optimal DO concentration of 4 mg/Land sludge reflux ratio of 200%, the bio film-A/O...
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