title: Ammonium removal by a novel oligotrophic Acinetobacter sp. Y16 capable of heterotrophic nitrification-aerobic denitrification at low temperature.
abstract: Ammonium removal from source water is usually inhibited by insufficient carbon sources and low temperature in Northeastern China. A strain Y16 was isolated from oligotrophic niche and was identified as Acinetobacter sp. Y16. It demonstrated excellent capability for ammonium removal at 2 °C, and simultaneously produced nitrogen gas as the end product. About 66% of ammonium was removed after 36 h of incubation. Only trace accumulation of nitrate was observed during the process. The utilization of nitrite and nitrate as well as the existence of napA gene further proved the aerobic denitrification ability of strain Y16. Sodium acetate was the most favorable carbon source for ammonium oxidation by strain Y16. High rotation speed was beneficial for ammonium oxidation. Furthermore, strain Y16 could efficiently remove ammonium at low C/N ratio and low temperature conditions, which was advantageous for nitrogen removal from source water under cold temperatures.
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, PR China.
authors.forename: Xiaofei
authors.initials: X
authors.lastname: Huang
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, PR China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, PR China. Electronic address: wglihit@gmail.com.
authors.forename: Weiguang
authors.initials: W
authors.lastname: Li
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, PR China.
authors.forename: Duoying
authors.initials: D
authors.lastname: Zhang
authors.affiliation: School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, PR China.
authors.forename: Wen
authors.initials: W
authors.lastname: Qin
mesh_terms: D000150:Acinetobacter / Q000378:metabolism*; D000332:Aerobiosis; D064751:Ammonium Compounds / Q000737:chemistry / Q000302:isolation & purification*; D002244:Carbon / Q000737:chemistry; D002681:China; D058440:Denitrification; D005740:Gases; D009566:Nitrates / Q000737:chemistry; D058465:Nitrification; D009573:Nitrites / Q000737:chemistry; D009584:Nitrogen / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry; D010802:Phylogeny; D019346:Sodium Acetate / Q000737:chemistry; D013696:Temperature; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*; D014881:Water Supply
chemical_list: D064751:Ammonium Compounds; D005740:Gases; D009566:Nitrates; D009573:Nitrites; D014874:Water Pollutants, Chemical; D019346:Sodium Acetate; D002244:Carbon; D009584:Nitrogen; D010100:Oxygen
keywords: Acinetobacter sp.; Aerobic denitrification; Ammonium removal; Heterotrophic nitrification; Low temperature