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[{"key": "dc.contributor.advisor", "value": "Ohtonen, Arttu", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Modiq, Heliminna", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Matilainen, Rose", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Louhelainen, Jarmo", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Leinonen, Perttu", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2025-06-09T07:53:03Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2025-06-09T07:53:03Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2025", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/103251", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Tutkielmassa perehdyttiin kirjallisuuskatsauksen, sek\u00e4 yhti\u00f6n sis\u00e4isen ymp\u00e4rist\u00f6tarkkailun kautta p\u00e4\u00e4asiassa Taivalj\u00e4rven hopeakaivoksen uusiin passiiviseen typenpoistoon perustuvien hakebioreaktorien toimintaan, mutta my\u00f6s aiemmin k\u00e4yt\u00f6ss\u00e4 olleiden pintavalutuskenttien toimintaan, jotta voitaisiin tunnistaa ja kehitt\u00e4\u00e4 niiden toiminnan kannalta olennaisimpia tekij\u00f6it\u00e4.\nPassiivisen typenpoiston havaittiin olevan merkitt\u00e4v\u00e4sti tehokkaampaa hydraulisen viipym\u00e4ajan (HRT) ja l\u00e4mp\u00f6tilan kasvaessa. Liuennut orgaaninen hiili edist\u00e4\u00e4 typenpoistoa merkitt\u00e4v\u00e4sti ja sen merkitys huomattiin erityisesti, kun hakebioreaktoreista liukeni ensimm\u00e4isin\u00e4 viikkoina paljon hiilt\u00e4, josta seurasi poikkeuksellisen hyvi\u00e4 tuloksia, jotka heikkeniv\u00e4t hiilen liukenemisen v\u00e4henemisen j\u00e4lkeen.\nHakebioreaktoreiden typenpoisto perustuu anaerobiseen denitrifikaatioon, mutta hakkeesta mikrobeille ravintoa hajottavat eli\u00f6t toimivat aerobisesti, mink\u00e4 vuoksi hakebioreaktoreille suositellaan kuivien ja m\u00e4rkien olosuhteiden syklitt\u00e4mist\u00e4 hiilityppi tasapainon parantamiseksi. K\u00e4sitelt\u00e4v\u00e4n kaivoksen kuivausveden korkean happipitoisuuden ep\u00e4iltiin aiheuttavan hakebioreaktorin sis\u00e4\u00e4ntulokaivon l\u00e4heisyydess\u00e4 hakkeen liiallista kulumista ja viiv\u00e4stytt\u00e4v\u00e4n denitrifikaation alkamista.\nUseista teknisist\u00e4 ongelmista huolimatta passiiviset menetelm\u00e4t kevensiv\u00e4t kaivoksen tuottamaa vuoden 2024 kumulatiivista typpikuormitusta lokakuuhun menness\u00e4 7645 kg, kokonaiskuormituksen j\u00e4\u00e4dess\u00e4 7432 kg:aan. Vaikka vuoden kumulatiivinen typpikuormitus v\u00e4heni 51 %, ylittyi kaivoksen vuosittainen ymp\u00e4rist\u00f6luvan m\u00e4\u00e4ritt\u00e4m\u00e4 7000 kg raja-arvo, mik\u00e4 j\u00e4tt\u00e4\u00e4 viel\u00e4 kehitt\u00e4misen sijaa passiivisille menetelmille.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Paivi Vuorio (paelvuor@jyu.fi) on 2025-06-09T07:53:03Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2025-06-09T07:53:03Z (GMT). No. of bitstreams: 0\n Previous issue date: 2025", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "76", "language": null, "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.language.iso", "value": "fin", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": null, "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Passiiviset menetelm\u00e4t Taivalj\u00e4rven kaivoksen typpikuormituksen hallinnassa", "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-202506095054", "language": null, "element": "identifier", "qualifier": "urn", "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": "Kemian laitos", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Department of Chemistry", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": null, "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": null, "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Soveltava kemia", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Applied Chemistry", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.copyright", "value": "\u00a9 The Author(s)", "language": "fi", "element": "rights", "qualifier": "copyright", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": null, "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "masterThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.yso", "value": "kaivokset", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "kaivostoiminta", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "kuormitus", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "kaivosteollisuus", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}]
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