title: Nitrogen removal characteristics of enhanced in situ indigenous aerobic denitrification bacteria for micro-polluted reservoir source water.
abstract: Indigenous oligotrophic aerobic denitrifiers nitrogen removal characteristics, community metabolic activity and functional genes were analyzed in a micro-polluted reservoir. The results showed that the nitrate in the enhanced system decreased from 1.71±0.01 to 0.80±0.06mg/L, while the control system did little to remove and there was no nitrite accumulation. The total nitrogen (TN) removal rate of the enhanced system reached 38.33±1.50% and the TN removal rate of surface sediment in the enhanced system reached 23.85±2.52%. TN removal in the control system experienced an 85.48±2.37% increase. The densities of aerobic denitrifiers in the enhanced system ranged from 2.24×10(5) to 8.13×10(7)cfu/mL. The abundance of nirS and nirK genes in the enhanced system were higher than those of in the control system. These results suggest that the enhanced in situ indigenous aerobic denitrifiers have potential applications for the bioremediation of micro-polluted reservoir system.
authors.affiliation: School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
authors.forename: Shilei
authors.initials: S
authors.lastname: Zhou
authors.affiliation: School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China. Electronic address: huangtinglin@xauat.edu.cn.
authors.forename: Tinglin
authors.initials: T
authors.lastname: Huang
authors.affiliation: School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
authors.forename: Haihan
authors.initials: H
authors.lastname: Zhang
authors.affiliation: School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
authors.forename: Mingzheng
authors.initials: M
authors.lastname: Zeng
authors.affiliation: School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Liu
authors.affiliation: School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
authors.forename: Shiyuan
authors.initials: S
authors.lastname: Bai
authors.affiliation: School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
authors.forename: Jianchao
authors.initials: J
authors.lastname: Shi
authors.affiliation: School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
authors.forename: Xiaopeng
authors.initials: X
authors.lastname: Qiu
authors.affiliation: School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Yang
mesh_terms: D001420:Bacteria, Aerobic / Q000235:genetics / Q000378:metabolism*; D001673:Biodegradation, Environmental; D002244:Carbon / Q000302:isolation & purification; D058440:Denitrification; D005798:Genes, Bacterial; D006863:Hydrogen-Ion Concentration; D008970:Molecular Weight; D009584:Nitrogen / Q000302:isolation & purification*; D010084:Oxidation-Reduction; D010758:Phosphorus / Q000032:analysis; D016133:Polymerase Chain Reaction; D025341:Principal Component Analysis; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry; D014876:Water Pollution / Q000032:analysis*; D018508:Water Purification
chemical_list: D014867:Water; D010758:Phosphorus; D002244:Carbon; D009584:Nitrogen
keywords: Aerobic denitrification; In situ; Indigenous; Nitrogen removal; Oligotrophic