title: Enhanced long-term organics and nitrogen removal and associated microbial community in intermittently aerated subsurface flow constructed wetlands.
abstract: The long-term enhanced removal efficiency of organics and nitrogen in subsurface flow constructed wetlands (SSF CWs) with and without intermittent aeration for decentralized domestic wastewater was evaluated, and the function of intermittent aeration on microbial community was also investigated in this study. The high and long-term 95.6% COD, 96.1% NH4(+)-N and 85.8% TN removal efficiencies were achieved in experimental intermittently aerated SSF CW compared with non-aerated SSF CW. Aerated SSF CWs also exhibited the excellent removal performance when comparatively comparing with other strategies and techniques applied in CWs. In addition, fluorescence in situ hybridization (FISH) analysis revealed that associated microbial abundance significantly increased owing to intermittent aeration. These results indicated intermittent aeration CWs might be an effective and sustainable strategy for wastewater treatment in rural areas, but require further full-scale investigation in future.
authors.affiliation: National Engineering Laboratory of Coal-Fired Pollutants Emission Reduction, Shandong University, Jinan 250061, PR China.
authors.forename: Jinlin
authors.initials: J
authors.lastname: Fan
authors.affiliation: School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China.
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang
authors.affiliation: School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia.
authors.forename: Wenshan
authors.initials: W
authors.lastname: Guo
authors.affiliation: School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia.
authors.forename: Shuang
authors.initials: S
authors.lastname: Liang
authors.affiliation: College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China. Electronic address: haimingwu14@nwsuaf.edu.cn.
authors.forename: Haiming
authors.initials: H
authors.lastname: Wu
mesh_terms: D000332:Aerobiosis; D064751:Ammonium Compounds / Q000302:isolation & purification; D001419:Bacteria / Q000378:metabolism*; D057919:Biological Oxygen Demand Analysis; D058440:Denitrification; D009584:Nitrogen / Q000302:isolation & purification*; D009930:Organic Chemicals / Q000302:isolation & purification*; D010084:Oxidation-Reduction; D014865:Waste Disposal, Fluid; D062065:Wastewater; D053833:Wetlands
chemical_list: D064751:Ammonium Compounds; D009584:Nitrogen; D009930:Organic Chemicals; D062065:Wastewater
keywords: Denitrification; Intermittent aeration; Nitrification; Nitrogen removal; Vertical flow constructed wetlands