title: Application of membrane bioreactor for completely autotrophic nitrogen removal over nitrite (CANON) process.
abstract: A membrane bioreactor (MBR) was adopted for completely autotrophic nitrogen removal over nitrite (CANON) process at ambient temperature. CANON was rapidly started-up within around 50d under oxygen-limited condition. The average nitrogen removal rate reached to 0.70kgNm(-3)d(-1) with a removal efficiency of 88%. The ratio of air flow rate to volumetric ammonium loading rate should be maintained below 0.28Lairmin(-1)kg(-1)Nm(3)d for stable CANON. The feasibility of MBR for CANON process was proved in batch experiments. FISH results showed that aerobic ammonium-oxidizing bacteria predominated in the reactor sludge, whereas anaerobic ammonium-oxidizing bacteria predominated in the membrane biofilm. This study demonstrated that MBR was a suitable experimental setup for the operation of CANON process.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Xiaojing
authors.initials: X
authors.lastname: Zhang
authors.forename: Dong
authors.initials: D
authors.lastname: Li
authors.forename: Yuhai
authors.initials: Y
authors.lastname: Liang
authors.forename: Yulong
authors.initials: Y
authors.lastname: Zhang
authors.forename: Dan
authors.initials: D
authors.lastname: Fan
authors.forename: Jie
authors.initials: J
authors.lastname: Zhang
mesh_terms: D052818:Autotrophic Processes; D019149:Bioreactors / Q000382:microbiology*; D058440:Denitrification / Q000502:physiology*; D009573:Nitrites / Q000032:analysis*; D009584:Nitrogen / Q000032:analysis*; D010100:Oxygen / Q000378:metabolism; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D009573:Nitrites; D014874:Water Pollutants, Chemical; D009584:Nitrogen; D010100:Oxygen
keywords: AerAOB; AnAOB; CANON; DO; FISH; MBR