title: Intermittent aeration strategy to enhance organics and nitrogen removal in subsurface flow constructed wetlands.
abstract: In this study, an intermittent-aerated subsurface flow constructed wetland (SFCW) A was set up to assess its performance in decentralized rural sewage treatment. A conventional SFCW B and a subsurface wastewater infiltration system (SWIS C) were also constructed for comparison. Alternate anaerobic and aerobic conditions were well developed by intermittent aeration. High removal of organic pollutants (29.3 gm(-2) d(-1)), ammonium nitrogen (3.5 gm(-2) d(-1)) and total nitrogen (3.3 gm(-2) d(-1)) were obtained simultaneously in SFCW A compared with SFCW B and SWIS C. Fluorescence in situ hybridization analysis proved that the intermittent aeration obviously enhanced the growth of ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) in SFCW A. These results suggest that intermittent aeration strategy is reliable to enhance the performance of SFCWs in decentralized rural sewage treatment.
authors.affiliation: Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China.
authors.forename: Jinlin
authors.initials: J
authors.lastname: Fan
authors.forename: Bo
authors.initials: B
authors.lastname: Zhang
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang
authors.forename: Huu Hao
authors.initials: HH
authors.lastname: Ngo
authors.forename: Wenshan
authors.initials: W
authors.lastname: Guo
authors.forename: Feifei
authors.initials: F
authors.lastname: Liu
authors.forename: Yeye
authors.initials: Y
authors.lastname: Guo
authors.forename: Haiming
authors.initials: H
authors.lastname: Wu
mesh_terms: D000641:Ammonia / Q000378:metabolism; D057919:Biological Oxygen Demand Analysis; D017404:In Situ Hybridization, Fluorescence; D009584:Nitrogen / Q000032:analysis / Q000737:chemistry*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry; D010865:Pilot Projects; D012722:Sewage / Q000737:chemistry; D014872:Water Movements; D018508:Water Purification / Q000379:methods*; D053833:Wetlands
chemical_list: D012722:Sewage; D000641:Ammonia; D009584:Nitrogen; D010100:Oxygen