DOI: 10.1016/j.watres.2018.03.068
Scopus记录号: 2-s2.0-85047388032
论文题名: Sediment diffusion method improves wastewater nitrogen removal in the receiving lake sediments
作者: Aalto S.L. ; Saarenheimo J. ; Ropponen J. ; Juntunen J. ; Rissanen A.J. ; Tiirola M.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 138 起始页码: 312
结束页码: 322
语种: 英语
英文关键词: Denitrification
; DNRA
; Nitrate reduction
; Nitrogen removal
; Nitrous oxide
; Wastewater
Scopus关键词: Aquatic ecosystems
; Biogeochemistry
; Biological materials
; Denitrification
; Diffusion
; Lakes
; Nitrates
; Nitrogen oxides
; Organic compounds
; Sediments
; Wastewater
; Wastewater treatment
; Denitrification capacity
; Discharged wastewater
; Dissimilatory nitrate reduction
; DNRA
; Nitrate concentration
; Nitrate reduction
; Nitrous oxide
; Wastewater treatment plants
; Nitrogen removal
; ammonia
; nitrate
; nitrogen
; nitrous oxide
; organic matter
; oxygen
; stable isotope
; nitric acid derivative
; nitrogen
; oxygen
; ammonification
; aquatic ecosystem
; denitrification
; diffusion
; lacustrine deposit
; microbial activity
; nitrate
; nitrogen
; nitrous oxide
; organic matter
; pollutant removal
; reduction
; stable isotope
; wastewater treatment
; ammonification
; Article
; autumn
; denitrification
; diffusion
; lake sediment
; priority journal
; reduction (chemistry)
; seasonal variation
; sediment
; simulation
; spring
; waste water
; waste water management
; waste water treatment plant
; diffusion
; lake
; metabolism
; season
; sediment
; waste water
; water pollutant
; Finland
; Denitrification
; Diffusion
; Geologic Sediments
; Lakes
; Nitrates
; Nitrogen
; Oxygen
; Seasons
; Waste Water
; Water Pollutants, Chemical
英文摘要: Sediment microbes have a great potential to transform reactive N to harmless N2, thus decreasing wastewater nitrogen load into aquatic ecosystems. Here, we examined if spatial allocation of the wastewater discharge by a specially constructed sediment diffuser pipe system enhanced the microbial nitrate reduction processes. Full-scale experiments were set on two Finnish lake sites, Keuruu and Petäjävesi, and effects on the nitrate removal processes were studied using the stable isotope pairing technique. All nitrate reduction rates followed nitrate concentrations, being highest at the wastewater-influenced sampling points. Complete denitrification with N2 as an end-product was the main nitrate reduction process, indicating that the high nitrate and organic matter concentrations of wastewater did not promote nitrous oxide (N2O) production (truncated denitrification) or ammonification (dissimilatory nitrate reduction to ammonium; DNRA). Using 3D simulation, we demonstrated that the sediment diffusion method enhanced the contact time and amount of wastewater near the sediment surface especially in spring and in autumn, altering organic matter concentration and oxygen levels, and increasing the denitrification capacity of the sediment. We estimated that natural denitrification potentially removed 3–10% of discharged wastewater nitrate in the 33 ha study area of Keuruu, and the sediment diffusion method increased this areal denitrification capacity on average 45%. Overall, our results indicate that sediment diffusion method can supplement wastewater treatment plant (WWTP) nitrate removal without enhancing alternative harmful processes. © 2018 The Authors Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112784
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35, Jyväskylä, 40014, Finland; Department of Environmental and Biological Sciences, University of Eastern Finland, P.O. Box 1627, Kuopio, 70211, Finland; Finnish Environment Institute, Jyväskylä Office, Survontie 9A, Jyväskylä, 40500, Finland; Laboratory of Chemistry and Bioengineering, Tampere University of Technology, P.O. Box 527, Tampere, 33101, Finland
Recommended Citation:
Aalto S.L.,Saarenheimo J.,Ropponen J.,et al. Sediment diffusion method improves wastewater nitrogen removal in the receiving lake sediments[J]. Water Research,2018-01-01,138