There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.
Abstract
The study on the operational conditions of simultaneous nitrification and denitrification
(SND) in the channel of oxidation ditch (OD) without the need for a special anoxic
tank was carried out based on lab-scale and pilot-scale experiments using real domestic
wastewater. The influence of sludge loading and component proportion in influent,
temperature, hydraulic retention time (HRT), dissolved oxygen (DO) and operational
mode on SND was investigated. The result indicated that the optimal DO (ODO) of SND
occurrence was confirmed majorly by the sludge loading of influent and temperature,
the high TCOD/NH(3)-N and short HRT can enhance the occurrence of SND. A new operational
mode was proposed that achieved a higher removal efficiency of 60-70% for total nitrogen
by SND with HRT of 4-6h, and the concentrations of NH(3)-N and TN in effluent are
less than 5 and 15 mg/L, respectively.