RETRACTED: Performance of Nitrogen and Phosphorus Removal of Municipal Wastewater in Sequencing Batch Biofilm Reactor (Retracted Article)

A lab-scale innovative sequencing batch biofilm reactor (SBBR) was developed to treat municipal wastewater. At normal temperature, the operation conditions of the SBBR were 2 min inflow -> 180 min non aeration -> 300 min aeration -> 30 min sedimentation -> 10 min outflow. The SBBR system developed in this study was a high efficiency and saving energy of wastewater treatment technology. The average removal efficiencies of NH4+-N, TN, TP and COD reached 95.8%, 72.8%, 97.5%, 92.5%, respectively. The effluent concentration of NH4+-N, TN, TP and COD satisfied with the first level A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18919-2002). Moreover simultaneous nitrification and denitrification(SND) was preceeded in the system. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of the Organizers of 2011 International Conference on Energy and Environmental Science.