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[{"key": "dc.contributor.advisor", "value": "Pirhonen, Juhani", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Pulkkinen, Jani", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Nummela, Henri", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2023-09-27T06:21:27Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2023-09-27T06:21:27Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2023", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/89247", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Sis\u00e4vesill\u00e4 tapahtuvan vesiviljelyn tavoitteena tulevaisuudessa on tuotannon kasvattaminen sek\u00e4 p\u00e4\u00e4st\u00f6jen ja kulujen pienent\u00e4minen. T\u00e4m\u00e4 vaatii uusien ja kilpailukykyisten menetelmien kehitt\u00e4mist\u00e4. Kiertovesiviljelyss\u00e4 vett\u00e4 kierr\u00e4tet\u00e4\u00e4n j\u00e4rjestelm\u00e4n l\u00e4pi samalla puhdistaen sit\u00e4, jolloin uuden korvausveden m\u00e4\u00e4r\u00e4 on huomattavasti pienempi kuin perinteisess\u00e4 l\u00e4pivirtauskasvatuksessa. Kierto-vesiviljelyn etuina ovat pienemm\u00e4t ravinnep\u00e4\u00e4st\u00f6t sek\u00e4 tarkempi kasvatusolosuhteiden, kuten l\u00e4mp\u00f6tilan ja vedenlaadun, s\u00e4\u00e4tely. Haasteina puolestaan ovat taloudelliset kustannukset, kiintoaineen ja ravinteiden kertyminen j\u00e4rjestelm\u00e4\u00e4n, mik\u00e4 voi aiheuttaa ongelmia kalojen hyvinvoinnille ja j\u00e4rjestelm\u00e4n toiminnalle. Haasteita voidaan v\u00e4hent\u00e4\u00e4 erilaisilla vesiviljely tekniikoilla, kuten osittaiskiertokasvatuksella. Osittaiskiertokasvatusj\u00e4rjestelm\u00e4ss\u00e4 ei k\u00e4ytet\u00e4 biologista suodatinta ja uuden korvausveden m\u00e4\u00e4r\u00e4 on suurempi kuin kiertovesiviljelyss\u00e4. T\u00e4m\u00e4n tutkielman ravinnetasekoe toteutettiin Laukaan Luonnonvarakeskuksen kalanviljelylaitoksella vuonna 2020 k\u00e4ytt\u00f6\u00f6notetussa osittaiskiertokasvatusj\u00e4rjestelm\u00e4ss\u00e4. Osittaiskiertokasvatusj\u00e4rjestelm\u00e4 koostui kolmesta ISO-merikontista. Konttien poistovesi johdettiin py\u00f6rreselkeyttimeen, jossa kiintoaine eroteltiin poistovedest\u00e4. Vuoden 2021 ravinnetasekokeen tarkoituksena oli selvitt\u00e4\u00e4, voidaanko osittaiskiertoj\u00e4rjestelm\u00e4n poistoveden ravinnep\u00e4\u00e4st\u00f6j\u00e4 v\u00e4hent\u00e4\u00e4 liitt\u00e4m\u00e4ll\u00e4 j\u00e4rjestelm\u00e4\u00e4n rumpusuodatin ja kaksi pient\u00e4 rakennettua kosteikkoa. Py\u00f6rreselkeyttimen lietteen, rumpusuodattimen pesuveden sek\u00e4 poistoveden n\u00e4ytteist\u00e4 analysoitiin kiintoaineen, kokonaistypen, kokonaisfosforin sek\u00e4 fosfaattifosforin pitoisuudet. Kosteikoiden ja poistoveden n\u00e4ytteist\u00e4 analysoitiin kokonaistypen, ammonium-, nitriitti- ja nitraattitypen sek\u00e4 fosfaattifosforin pitoisuudet. Ravinnetasekokeen aikana poistoveden mukana vapautui 0,4 kg fosforia, 28 kg typpe\u00e4 ja 38 kg kiintoainetta. Kaloihin sitoutumattomasta typest\u00e4 93,8 % vapautui poistoveden mu-kana. Typen p\u00e4\u00e4st\u00f6j\u00e4 on mahdollista v\u00e4hent\u00e4\u00e4 kosteikoiden avulla. K\u00e4ytetyt kosteikot alensivat poistoveden typpipitoisuutta heikosti, sill\u00e4 ravinnetasekoe ajoittui j\u00e4rviruo\u2019on kasvukauden loppuun. Ravinnep\u00e4\u00e4st\u00f6t suhteutettuna ruokintaan olivat fosforin osalta pienemm\u00e4t vuonna 2021, (0,6 \u00b1 0,1 g/kg rehua) kuin vuonna 2020 (2,7 \u00b1 0,6 g/kg rehua) (p < 0,001). Erot vuosien v\u00e4lill\u00e4 johtuivat k\u00e4ytettyjen rehujen fosforipitoisuudesta sek\u00e4 rehun sis\u00e4lt\u00e4m\u00e4n fosforin tehokkaammasta sitoutumisesta kaloihin vuonna 2021.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "The aim for inland aquaculture in the future is to increase production and to decrease costs and effluent discharges. Development for new and commercially competitive methods are required. In recirculating aquaculture systems (RAS), the water is reused in the system. The water is treated as it recirculates in the system and the usage of makeup water is significantly lower than in traditional flow-through systems. The advantages of the recirculating aquaculture system are lower nutrient discharge and control over the rearing conditions, for example better control over water temperature and water quality parameters. The challenges in recirculating aquaculture are expenses of the system, accumulation of solids and nutrients in the system, which can cause problems to fish health and to the function of the system. The challenges in recirculating aquaculture system can be reduced with different aquaculture methods, for example a partial recirculating aquaculture system. In partial recirculating aquaculture system, the usage of makeup water is higher than in recirculating aquaculture systems, but less than in flow-through systems. For this thesis the nutrient discharge experiment was carried out in the fish farm of Natural Resources Institute Finland, in Laukaa, in a partial recirculating aquaculture system, which was put into service in 2020. The partial recirculating aquaculture system consisted of three ISO shipping containers. Wastewater flowed into a swirl separator, where the solids were sedimented to sludge and clear water was discharged. A drum filter and two constructed wetlands were connected to the system to improve discharged water quality. Concentrations of phosphorus, nitrogen and solid matter were analysed of the sludge from swirl separator, backwash water of the drum filter and discharged water. Concentrations of total nitrogen, ammonia, nitrite, nitrate, and phosphate were analysed of the wetland water and wastewater. During the experiment 0.4 kg of phosphorus, 28 kg of nitrogen and 38 kg of solid matter were released in the wastewater. 93.8 % of the nitrogen not bound to fish was released in the wastewater. Nitrogen emissions could be reduced with wetlands. Phosphorus discharges in proportion to the fed feed were lower in 2021 (0.6 \u00b1 0.1 g/kg feed) than in 2020 (2.7 \u00b1 0.6 g/kg feed) (p < 0.001). Differences in phosphorus discharge is caused by different feed compositions and more efficient binding of phosphorus in fish in 2021.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Paivi Vuorio (paelvuor@jyu.fi) on 2023-09-27T06:21:27Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2023-09-27T06:21:27Z (GMT). No. of bitstreams: 0\n Previous issue date: 2023", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "36", "language": "", "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": "kiertovesiviljely", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "merikontit", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Kalojen osittaiskiertokasvatuksen ravinnep\u00e4\u00e4st\u00f6t ja poistoveden k\u00e4sittelymenetelm\u00e4t", "language": "", "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-202309275258", "language": "", "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "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": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "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": "yvv.contractresearch.funding", "value": "0", "language": "", "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.copyright", "value": "\u00a9 The Author(s)", "language": null, "element": "rights", "qualifier": "copyright", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "restrictedAccess", "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.oppiainekoodi", "value": "4012", "language": "", "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "vesiviljely (kalatalous)", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "ravinteet", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "fosfori", "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.subject.yso", "value": "p\u00e4\u00e4st\u00f6t", "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"}, {"key": "dc.rights.accessrights", "value": "The author has not given permission to make the work publicly available electronically. Therefore the material can be read only at the archival workstation at Jyv\u00e4skyl\u00e4 University Library (https://kirjasto.jyu.fi/collections/archival-workstation).", "language": "en", "element": "rights", "qualifier": "accessrights", "schema": "dc"}, {"key": "dc.rights.accessrights", "value": "Tekij\u00e4 ei ole antanut lupaa avoimeen julkaisuun, joten aineisto on luettavissa vain Jyv\u00e4skyl\u00e4n yliopiston kirjaston arkistoty\u00f6semalta. Ks. https://kirjasto.jyu.fi/kokoelmat/arkistotyoasema..", "language": "fi", "element": "rights", "qualifier": "accessrights", "schema": "dc"}]
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