title: Study of operational conditions of simultaneous nitrification and denitrification in a Carrousel oxidation ditch for domestic wastewater treatment.
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.
authors.affiliation: State Key Joint Laboratory of Environment Simulation and Pollution Control, Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Yanchen
authors.initials: Y
authors.lastname: Liu
authors.forename: Hanchang
authors.initials: H
authors.lastname: Shi
authors.forename: Lan
authors.initials: L
authors.lastname: Xia
authors.forename: Huiming
authors.initials: H
authors.lastname: Shi
authors.forename: Tonggang
authors.initials: T
authors.lastname: Shen
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Wang
authors.forename: Gan
authors.initials: G
authors.lastname: Wang
authors.forename: Yingzhe
authors.initials: Y
authors.lastname: Wang
mesh_terms: D000641:Ammonia / Q000737:chemistry; D001673:Biodegradation, Environmental; D019149:Bioreactors; D004867:Equipment Design; D009584:Nitrogen / Q000737:chemistry* / Q000302:isolation & purification; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry*; D010865:Pilot Projects; D012722:Sewage; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D012722:Sewage; D014874:Water Pollutants, Chemical; D000641:Ammonia; D009584:Nitrogen; D010100:Oxygen