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Sediment diffusion method improves wastewater nitrogen removal in the receiving lake sediments

Tutkimustuotosvertaisarvioitu

Standard

Sediment diffusion method improves wastewater nitrogen removal in the receiving lake sediments. / Aalto, Sanni L; Saarenheimo, Jatta; Ropponen, J; Juntunen, J; Rissanen, Antti J.; Tiirola, Marja.

julkaisussa: Water Research, Vuosikerta 138, 2018, s. 312-322.

Tutkimustuotosvertaisarvioitu

Harvard

Aalto, SL, Saarenheimo, J, Ropponen, J, Juntunen, J, Rissanen, AJ & Tiirola, M 2018, 'Sediment diffusion method improves wastewater nitrogen removal in the receiving lake sediments', Water Research, Vuosikerta. 138, Sivut 312-322. https://doi.org/10.1016/j.watres.2018.03.068

APA

Aalto, S. L., Saarenheimo, J., Ropponen, J., Juntunen, J., Rissanen, A. J., & Tiirola, M. (2018). Sediment diffusion method improves wastewater nitrogen removal in the receiving lake sediments. Water Research, 138, 312-322. https://doi.org/10.1016/j.watres.2018.03.068

Vancouver

Author

Aalto, Sanni L ; Saarenheimo, Jatta ; Ropponen, J ; Juntunen, J ; Rissanen, Antti J. ; Tiirola, Marja. / Sediment diffusion method improves wastewater nitrogen removal in the receiving lake sediments. Julkaisussa: Water Research. 2018 ; Vuosikerta 138. Sivut 312-322.

Bibtex - Lataa

@article{e6866df2bdf64bf494c126b32e528999,
title = "Sediment diffusion method improves wastewater nitrogen removal in the receiving lake sediments",
abstract = "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 Pet{\"a}j{\"a}vesi, 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.",
author = "Aalto, {Sanni L} and Jatta Saarenheimo and J Ropponen and J Juntunen and Rissanen, {Antti J.} and Marja Tiirola",
year = "2018",
doi = "10.1016/j.watres.2018.03.068",
language = "English",
volume = "138",
pages = "312--322",
journal = "Water Research",
issn = "0043-1354",
publisher = "PERGAMON-ELSEVIER SCIENCE LTD",

}

RIS (suitable for import to EndNote) - Lataa

TY - JOUR

T1 - Sediment diffusion method improves wastewater nitrogen removal in the receiving lake sediments

AU - Aalto, Sanni L

AU - Saarenheimo, Jatta

AU - Ropponen, J

AU - Juntunen, J

AU - Rissanen, Antti J.

AU - Tiirola, Marja

PY - 2018

Y1 - 2018

N2 - 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.

AB - 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.

U2 - 10.1016/j.watres.2018.03.068

DO - 10.1016/j.watres.2018.03.068

M3 - Article

VL - 138

SP - 312

EP - 322

JO - Water Research

JF - Water Research

SN - 0043-1354

ER -