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[{"key": "dc.contributor.advisor", "value": "Tiirola, Marja", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Rissanen, Antti", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Hasari, Miikka", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2015-02-19T11:15:15Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2015-02-19T11:15:15Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2015", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.other", "value": "oai:jykdok.linneanet.fi:1466546", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/45373", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Denitrifikaatio ja DNRA (dissimilatory nitrate reduction to ammonium) ovat nitraattia pelkist\u00e4vi\u00e4 prosesseja, jotka yleens\u00e4 esiintyv\u00e4t hapettomissa olosuhteissa, kuten j\u00e4rvien sedimenteiss\u00e4 ja alusvesiss\u00e4. Denitrifikaatiossa syntyy typpikaasua, joka poistuu ilmakeh\u00e4\u00e4n, kun taas DNRA:n lopputuote on ammonium, joka j\u00e4\u00e4 veteen. Luonnollinen denitrifikaatio voi poistaa typpe\u00e4 j\u00e4tevedenpuhdistamon poistovedest\u00e4, mutta DNRA:n rooli on v\u00e4hemm\u00e4n tunnettu. N\u00e4iden prosessien tutkiminen voi auttaa j\u00e4tevedenpuhdistuksen kehitt\u00e4misess\u00e4. T\u00e4ss\u00e4 Pro Gradu \u2013ty\u00f6ss\u00e4 tutkittiin denitrifikaation ja DNRA:n prosessinopeuksia sek\u00e4 nopeuksien korrelaatioita erilaisten vedenlaatumuuttujien kanssa. Tutkimuspaikkana oli Keurusselk\u00e4 \u2013j\u00e4rvi, jonne paikallinen j\u00e4tevedenpuhdistamo laskee poistovetens\u00e4. Metodina k\u00e4ytettiin isotooppileimausta inkubaatio- ja reaktorikokeissa.\nJ\u00e4rvest\u00e4 valittiin kolme n\u00e4ytteenottopistett\u00e4, joista kaksi sijaitsivat poistovesiputkesta my\u00f6t\u00e4virtaan ja yht\u00e4 k\u00e4ytettiin kontrollina. Hypoteesein\u00e4 olivat: a) denitrifikaationopeudet ovat suurempia purkuputken l\u00e4heisyydess\u00e4 korkeamman nitraattipitoisuuden vuoksi, sek\u00e4 b) DNRA:denitrifikaatio \u2013suhde on niin ik\u00e4\u00e4n suurempi samoissa olosuhteissa. Denitrifikaationopeudet olivat korkeimmillaan purkuputken kohdalla ja ylip\u00e4\u00e4t\u00e4\u00e4n suurempia kuin DNRA:n nopeudet. DNRA:denitrifikaatio \u2013suhteessa ei havaittu merkitt\u00e4vi\u00e4 eroja n\u00e4ytepisteiden tai ajankohtien v\u00e4lill\u00e4. Denitrifikaatio korreloi positiivisesti nitraattipitoisuuden kanssa ja negatiivisesti happipitoisuuden sek\u00e4 pH:n kanssa. DNRA korreloi negatiivisesti pH:n kanssa. Reaktorikokeissa havaittiin aluksi positiivinen korrelaatio denitrifikaation ja veden nitraattipitoisuuden v\u00e4lill\u00e4, mutta 24 tunnin inkubaation j\u00e4lkeen vastaavaa korrelaatiota ei en\u00e4\u00e4 esiintynyt.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Denitrification and dissimilatory nitrate reduction to ammonium (DNRA) are anoxic microbial nitrate-reducing processes, which occur for example in lake sediment and hypolimnion. Denitrification produces N2 gas, which exits the water body, while DNRA produces ammonium, which is retained in the water. Wastewater effluent in a lake can be further purified by natural denitrification, but the role of DNRA is less known. Understanding these processes can help to improve wastewater treatment. In this thesis, rates of denitrification and DNRA and their correlations with water quality were studied in Lake Keurusselk\u00e4, where a wastewater treatment plant releases its effluent waters. Incubation and reactor experiments were conducted by using 15N tracers.\nThe hypotheses were that the rates of denitrification are higher when wastewater effluent is present, and that the DNRA:denitrification ratio is also higher in the same conditions. The denitrification rates were highest near the effluent pipe, and in overall higher than those of DNRA. The ratio showed no such trend. Denitrification correlated positively with nitrate concentration and negatively with oxygen concentration and pH, while DNRA showed negative correlation with pH. The reactor experiment results showed initial positive correlation between ambient NO3- levels and denitrification, but not anymore after 24 hours of incubation.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Miikka Hasari (mialhasa) on 2015-02-19 11:15:14.595667. Form: Pro gradu -lomake (https://kirjasto.jyu.fi/julkaisut/julkaisulomakkeet/pro-gradu-lomake). JyX data: [jyx_publishing-allowed (fi) =True]", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by jyx lomake-julkaisija (jyx-julkaisija@noreply.fi) on 2015-02-19T11:15:15Z\nNo. of bitstreams: 2\nURN:NBN:fi:jyu-201502191346.pdf: 1881786 bytes, checksum: a6e456ab8582611cc44fe71f344cc06f (MD5)\nlicense.html: 4859 bytes, checksum: d1a72d64fd334f35e60a41e3d6cc3455 (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2015-02-19T11:15:15Z (GMT). No. of bitstreams: 2\nURN:NBN:fi:jyu-201502191346.pdf: 1881786 bytes, checksum: a6e456ab8582611cc44fe71f344cc06f (MD5)\nlicense.html: 4859 bytes, checksum: d1a72d64fd334f35e60a41e3d6cc3455 (MD5)\n Previous issue date: 2015", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "1 verkkoaineisto (40 sivua)", "language": null, "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.format.mimetype", "value": "application/pdf", "language": null, "element": "format", "qualifier": "mimetype", "schema": "dc"}, {"key": "dc.language.iso", "value": "eng", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": "en", "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "DNRA", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Denitrification and dissimilatory nitrate reduction to ammonium in a lake receiving wastewater effluent", "language": null, "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "master thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-201502191346", "language": null, "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Matemaattis-luonnontieteellinen tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Sciences", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Bio- ja ymp\u00e4rist\u00f6tieteiden laitos", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Department of Biological and Environmental Science", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Akvaattiset tieteet", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Aquatic sciences", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.date.updated", "value": "2015-02-19T11:15:16Z", "language": null, "element": "date", "qualifier": "updated", "schema": "dc"}, {"key": "yvv.contractresearch.funding", "value": "0", "language": null, "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": "fi", "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "masterThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.oppiainekoodi", "value": "4012", "language": null, "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "j\u00e4rvet", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "denitrifikaatio", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "isotoopit", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.format.content", "value": "fulltext", "language": null, "element": "format", "qualifier": "content", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}, {"key": "dc.type.okm", "value": "G2", "language": null, "element": "type", "qualifier": "okm", "schema": "dc"}]
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