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dc.contributor.authorAalto, Sanni L.
dc.contributor.authorSaarenheimo, Jatta
dc.contributor.authorRopponen, Janne
dc.contributor.authorJuntunen, Janne
dc.contributor.authorRissanen, Antti
dc.contributor.authorTiirola, Marja
dc.date.accessioned2018-04-17T06:57:54Z
dc.date.available2018-04-17T06:57:54Z
dc.date.issued2018
dc.identifier.citationAalto, S. L., Saarenheimo, J., Ropponen, J., Juntunen, J., Rissanen, A., & Tiirola, M. (2018). Sediment diffusion method improves wastewater nitrogen removal in the receiving lake sediments. <i>Water Research</i>, <i>138</i>, 312-322. <a href="https://doi.org/10.1016/j.watres.2018.03.068" target="_blank">https://doi.org/10.1016/j.watres.2018.03.068</a>
dc.identifier.otherCONVID_27975959
dc.identifier.otherTUTKAID_77213
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/57618
dc.description.abstractSediment 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.
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherIWA Publishing
dc.relation.ispartofseriesWater Research
dc.subject.otherDNRA
dc.subject.othernitrate reduction
dc.subject.othernitrogen removal
dc.subject.otherwastewater
dc.titleSediment diffusion method improves wastewater nitrogen removal in the receiving lake sediments
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201804091953
dc.contributor.laitosBio- ja ympäristötieteiden laitosfi
dc.contributor.laitosDepartment of Biological and Environmental Scienceen
dc.contributor.oppiaineAkvaattiset tieteetfi
dc.contributor.oppiaineYmpäristötiedefi
dc.contributor.oppiaineAquatic Sciencesen
dc.contributor.oppiaineEnvironmental Scienceen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2018-04-09T06:06:14Z
dc.description.reviewstatuspeerReviewed
dc.format.pagerange312-322
dc.relation.issn0043-1354
dc.relation.numberinseries0
dc.relation.volume138
dc.type.versionpublishedVersion
dc.rights.copyright© 2018 The Authors. Published by Elsevier Ltd. This is an open access article distributed under the terms of the Creative Commons License.
dc.rights.accesslevelopenAccessfi
dc.relation.grantnumber615146
dc.relation.grantnumber615146
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/FP7/615146/EU//
dc.subject.ysojätevesi
dc.subject.ysosedimentit
dc.subject.ysodenitrifikaatio
dc.subject.ysotyppi
dc.subject.ysodityppioksidi
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p5794
jyx.subject.urihttp://www.yso.fi/onto/yso/p14605
jyx.subject.urihttp://www.yso.fi/onto/yso/p12487
jyx.subject.urihttp://www.yso.fi/onto/yso/p10988
jyx.subject.urihttp://www.yso.fi/onto/yso/p15107
dc.rights.urlhttps://creativecommons.org/licenses/by/4.0/
dc.relation.doi10.1016/j.watres.2018.03.068
dc.relation.funderEuroopan komissiofi
dc.relation.funderEuropean Commissionen
jyx.fundingprogramEU:n 7. puiteohjelma (FP7)fi
jyx.fundingprogramFP7 (EU's 7th Framework Programme)en
jyx.fundinginformationThe work was supported by the funding of Academy of Finland project 260797, European Union project LIFE12 ENV/FI/597 (N-SINK) and European Research Council (ERC) CoG project 615146 for MT, and Academy of Finland projects 310302 for SLA and 286642 for AJR.


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© 2018 The Authors. Published by Elsevier Ltd. This is an open access article distributed under the terms of the Creative Commons License.
Except where otherwise noted, this item's license is described as © 2018 The Authors. Published by Elsevier Ltd. This is an open access article distributed under the terms of the Creative Commons License.