title: Performance evaluation of enhanced SBR in simultaneous removal of nitrogen and phosphorous.
abstract: BACKGROUND
  Simultaneous nitrogen, phosphorous and COD removal in a pilot-scale enhanced Sequencing Batch Reactor (eSBR) was investigated.
  
  
  METHODS
  The reactor consisted of a pre-anoxic zone and internal recycle and was fed with synthetic wastewater. The study was performed by operating the reactor in 6-hour cycles in three different operational modes during a time frame of 279 days.
  
  
  RESULTS
  Under the best operational conditions, the average removal rate of COD, TN, and TP were obtained as 93.52, 88.31, and 97.56%, respectively.
  
  
  CONCLUSIONS
  A significant denitrifying phosphorus removal (more than 80%) occurred at run1 and 3 which started the cycle under anoxic condition.
authors.affiliation: Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Tahereh
authors.initials: T
authors.lastname: Jafarzadeh Ghehi
authors.affiliation: Department of Environmental Engineering (Water Resources), Science and Research Branch, Faculty of Environment and Energy (FEE), Islamic Azad University, Tehran, Iran.
authors.forename: Soheil
authors.initials: S
authors.lastname: Mortezaeifar
authors.affiliation: Department of Environmental Engineering, School of Public Health, Iran University of Medical Sciences, P.O.Box:15875-4199, Tehran, Iran.
authors.forename: Mitra
authors.initials: M
authors.lastname: Gholami
authors.affiliation: Department of Environmental Engineering, School of Public Health, Iran University of Medical Sciences, P.O.Box:15875-4199, Tehran, Iran.
authors.forename: Roshanak
authors.initials: R
authors.lastname: Rezaei Kalantary
authors.affiliation: Center for Water Quality Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Amir Hossein
authors.initials: AH
authors.lastname: Mahvi
keywords: Biological nutrient removal; C/N/P ratio; Enhanced biological SBR; Nitrification- denitrification; Phosphorous removal