title: A pilot study on a step-feeding anoxic/oxic activated sludge system.
abstract: A four stage pilot plant of step-feed biological nutrient removal (BNR) was employed to investigate reactor performance and process stability. The results obtained showed that step-feed BNR is efficient and cost-effective for nitrogen and carbonaceous removal from municipal wastewater. The total average removal efficiencies of COD, NH3-N, TN and TP could reach as high as 89.5, 97.8, 73 and 75%, respectively, with 50% of return activated sludge (RAS), 9 h of hydraulic retention time (HRT) and 20 d of sludge retention time (SRT). Step-feed BNR is an alternative and effective technology of nutrient removal for municipal wastewater treatment.
authors.affiliation: School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, China.
authors.forename: Wang
authors.initials: W
authors.lastname: Sheping
authors.forename: Yu
authors.initials: Y
authors.lastname: Lifang
authors.forename: Han
authors.initials: H
authors.lastname: Guanghui
authors.forename: Zhu
authors.initials: Z
authors.lastname: Hairong
authors.forename: Peng
authors.initials: P
authors.lastname: Dangcong
mesh_terms: D000332:Aerobiosis; D000693:Anaerobiosis; D009584:Nitrogen / Q000032:analysis*; D010865:Pilot Projects; D012722:Sewage / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
chemical_list: D012722:Sewage; D014874:Water Pollutants, Chemical; D009584:Nitrogen