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[{"key": "dc.contributor.advisor", "value": "Louhelainen, Jarmo", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Lehmonen, Jani", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Kakko, Otso", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2025-06-06T06:37:30Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2025-06-06T06:37:30Z", "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/123456789/103139", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "T\u00e4ss\u00e4 pro gradu -tutkielmassa karakterisoidaan puupohjaisen vaahtorainausprosessin prosessivett\u00e4 sek\u00e4 kehitet\u00e4\u00e4n prosessissa muodostuneelle j\u00e4tevedelle puhdistusmenetelm\u00e4. Vaahtorainaus on menetelm\u00e4, jossa kuitupohjaisten tuotteiden valmistamisessa k\u00e4ytet\u00e4\u00e4n kantaja-aineena, veden sijasta, vesipohjaista vaahtoa. Pro gradu -tutkielman kirjallisuuskatsauksessa tarkastellaan puun koostumusta, vaahtoa sek\u00e4 vaahtorainausta ja sen sovelluksia. N\u00e4iden lis\u00e4ksi perehdyt\u00e4\u00e4n veden laatuun vaikuttaviin fyysisiin, kemiallisiin ja biologisiin tekij\u00f6ihin sek\u00e4 j\u00e4teveden puhdistamiseen.\nTy\u00f6n kokeellisessa osuudessa kierr\u00e4tetyst\u00e4 prosessivedest\u00e4, kymmenen kierr\u00e4tyst\u00e4, karakterisoitiin veden laatua kuormittavia aineita: fosfori, typpi, sulfaatti, ammoniumioni sek\u00e4 kemiallinen hapenkulutus. Pitoisuuksien mahdollista kumuloitumista seurattiin jokaisen kierr\u00e4tyksen j\u00e4lkeen. Mitatut pitoisuudet 10. kierron j\u00e4lkeen olivat fosfori 3,1 mg/l, typpi \n11 mg/l, sulfaatti 35 mg/l, ammoniumioni 1,1 \u00b1 0,13 mg/l ja kemiallinen hapenkulutus oli\n30000 \u00b1 130 mg/l. \nJ\u00e4teveden puhdistusta varten kehitettiin puhdistusprosessi, joka on skaalattavissa laboratoriomittakaavasta teollisen mittakaavan tuotantoprosessiin. Puhdistusprosessi koostui kolmesta eri vaiheesta: flokkulointi, koagulointi, suodatus. Kolmivaiheisen prosessin j\u00e4lkeen j\u00e4teveden pitoisuudet olivat fosfori < 0,5 mg/l, typpi < 10 mg/l, sulfaatti 12400 \u00b1 600 mg/l, ammoniumioni 1,5 mg/l ja kemiallinen hapenkulutus 1200 \u00b1 40 mg/l. \nTulosten perusteella prosessiveden kemiallinen hapenkulutus saatiin v\u00e4hennetty\u00e4 96 %. Kemiallisen hapenkulutuksen alentamiseksi k\u00e4ytettiin runsaasti sulfaattia. T\u00e4m\u00e4n poistaminen on kuitenkin yksinkertaisempi prosessi kuin kemiallisen hapenkulutuksen v\u00e4hent\u00e4minen. Puhdistusmenetelm\u00e4\u00e4 kehitett\u00e4ess\u00e4 huomioitiin prosessin skaalautuvuuden t\u00e4rkeys teollista mittakaavaa ajatellen.", "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 2025-06-06T06:37:30Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2025-06-06T06:37:30Z (GMT). No. of bitstreams: 0\n Previous issue date: 2025", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "81", "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": "prosessivesi", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "UV/Vis", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Puupohjaisen prosessiveden karakterisointi sek\u00e4 j\u00e4teveden puhdistus", "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-202506064945", "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": "Analyyttinen kemia", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Analytical 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": "puu (luonnonmateriaalit)", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "j\u00e4tevesi", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "vedenlaatu", "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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