title: Performance of organics and nitrogen removal in subsurface wastewater infiltration systems by intermittent aeration and shunt distributing wastewater.
abstract: Organics and nitrogen removal in four subsurface wastewater infiltration systems (SWISs), named SWIS A (without intermittent aeration and shunt distributing wastewater), SWIS B (with intermittent aeration), SWIS C (with shunt distributing wastewater) and SWIS D (with intermittent aeration and shunt distributing wastewater) was investigated. High average removal rates of 92.3% for COD, 90.2% for NH4-N and 88.1% for TN were achieved simultaneously in SWIS D compared with SWIS A, B and C. The excellent TN removal of SWIS D was due to intermittent aeration provided sufficient oxygen for nitrification in upper matrix and the favorable anoxic or anaerobic environment for denitrification in subsequent matrix, and moreover, shunt distributing wastewater provided sufficient carbon source for denitrification process. The results indicated that intermittent artificial aeration combined with shunt distributing wastewater could achieve high organics and nitrogen removal in SWISs.
authors.affiliation: College of Life Science, Shenyang Normal University, Shenyang 110034, China. Electronic address: crystalpan78@126.com.
authors.forename: Jing
authors.initials: J
authors.lastname: Pan
authors.affiliation: College of Life Science, Shenyang Normal University, Shenyang 110034, China.
authors.forename: Fang
authors.initials: F
authors.lastname: Yuan
authors.affiliation: College of Life Science, Shenyang Normal University, Shenyang 110034, China.
authors.forename: Long
authors.initials: L
authors.lastname: Yu
authors.affiliation: College of Life Science, Shenyang Normal University, Shenyang 110034, China.
authors.forename: Linli
authors.initials: L
authors.lastname: Huang
authors.affiliation: College of Life Science, Shenyang Normal University, Shenyang 110034, China.
authors.forename: Hexin
authors.initials: H
authors.lastname: Fei
authors.affiliation: College of Life Science, Shenyang Normal University, Shenyang 110034, China.
authors.forename: Fan
authors.initials: F
authors.lastname: Cheng
authors.affiliation: College of Life Science, Shenyang Normal University, Shenyang 110034, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhang
mesh_terms: D057919:Biological Oxygen Demand Analysis; D058440:Denitrification; D058465:Nitrification; D009584:Nitrogen / Q000032:analysis; D062065:Wastewater / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D009584:Nitrogen; D062065:Wastewater
keywords: Intermittent aeration; Nitrogen; Oxidation reduction potential; Shunt distributing wastewater; Subsurface wastewater infiltration system