title: [Study on ability of nitrification in a subsurface constructed wetland system treating sewage].
abstract: The nitrification ability of different layers in a subsurface constructed wetland treating sewage was measured. The experiment results showed that the ability of nitrification was decreased along the direction of water flow in the subsurface wetland. The constants of ammonia oxidation rate and nitrite oxidation rate in the slag layer on the bottom were 1.99-6.89 mg.(h.kg)-1 and 1.14-5.22 mg.(h.kg)-1 respectively, but in the soil layer on the top were 0.53-0.89 mg.(h.kg)-1 and 0.96-1.39 mg.(h.kg)-1 respectively. So the ability of nitrification in the layer of slag was better than the layer of soil obviously, and it showed that the nitrification was mainly happened in the slag layer.
authors.affiliation: ESPC State Key Joint Laboratory, Dept. of Environ. Sci. and Eng., Tsinghua University, Beijing 100084, China.
authors.forename: Chaoxiang
authors.initials: C
authors.lastname: Liu
authors.forename: Chunhong
authors.initials: C
authors.lastname: Dong
authors.forename: Fengming
authors.initials: F
authors.lastname: Li
authors.forename: Hongying
authors.initials: H
authors.lastname: Hu
authors.forename: Xia
authors.initials: X
authors.lastname: Huang
authors.forename: Hangchang
authors.initials: H
authors.lastname: Shi
authors.forename: Yi
authors.initials: Y
authors.lastname: Qian
mesh_terms: D000641:Ammonia / Q000378:metabolism; D017753:Ecosystem; D005068:Eutrophication; D009609:Nitrous Oxide / Q000378:metabolism; D012722:Sewage; D012987:Soil / Q000032:analysis; D014865:Waste Disposal, Fluid / Q000379:methods*; D014872:Water Movements
chemical_list: D012722:Sewage; D012987:Soil; D000641:Ammonia; D009609:Nitrous Oxide