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dc.contributor.authorLang, Štěpán
dc.date.accessioned2022-01-09T01:02:14Z
dc.date.available2022-01-09T01:02:14Z
dc.date.issued2017
dc.identifier43914346
dc.identifier.issn1211-8516 Sherpa/RoMEO, JCR
dc.identifier.urihttps://repozitar.mendelu.cz/xmlui/handle/20.500.12698/1418
dc.description.abstractAquaculture is currently one of the fastest growing food-producing sectors, accounting for around 50 % of the world fs food fish production. Limited resources, together with climatic change, have stimulated the search for solutions to support and sustain the production of fish as a source of protein for human consumption. The integration of a biological filtration (BF) into a semi-recirculating fish rearing system can increase its carrying capacity and increase system efficiency compared to its f energy consumption with minimum changes of system composition and minimal costs. Question is the capacity of the BF installed to a system and how it affects water quality. Two different amounts of BF media (surface) added to semi-recirculating rearing system compared with the same system without BF were tested in case of this study. The results have shown that if the BF capacity is insufficient, BF can have negative effects to the quality of water environment. The insufficient amount of BF media caused 4 times reduction of ammonia nitrogen (N-NH4 +) in system with BF compared to non BF system so it increased the system capacity for feed load 4 times. On the other hand it also increased nitrite nitrogen concentrations permanently more than 5.8 times for BF system compared to non BF system and increased rearing costs because the need of adding chlorides to the system to protect fish from nitrites toxicity. When the BF was dimensioned properly (next year) there were almost no N-NH4 + in a system (0.10 mg.l-1) and the concentration of N-NO2 - was kept at low levels too (0.150 mg .l-1). The nitrates (N.NO3-) concentration reached the level of 5.37 and 8.65 mg.l-1 in 2012 and 2013 respectively.en
dc.format441-446
dc.publisherMendelova univerzita v Brně
dc.relation.ispartofActa Universitatis Agriculturae et Silviculturae Mendelianae Brunensis
dc.relation.urihttps://doi.org/10.11118/actaun201765020441
dc.rightsCC BY-NC-ND 4.0
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectAmmoniaen
dc.subjectBiobloken
dc.subjectNitrificationen
dc.subjectNitriteen
dc.subjectRearing capacityen
dc.subjectTrouten
dc.subjectWater reuseen
dc.titleThe addition of simple biological filters of different capacity to semi-recirculating fish rearing system and its effectsen
dc.typeJ_ČLÁNEK
dc.date.updated2022-01-09T01:02:13Z
dc.description.versionOA
local.identifier.doi10.11118/actaun201765020441
local.identifier.scopus2-s2.0-85018456691
local.number2
local.volume65
local.identifier.obd43914346
local.identifier.e-issn2464-8310
dc.project.IDQJ1210013
dc.project.IDTechnologie chovu sladkovodních ryb s využitím recirkulačních systémů dánského typu se zaměřením na metody efektivního řízení prostředí a veterinární péče.
local.contributor.affiliationAF


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Zobrazit minimální záznam

CC BY-NC-ND 4.0
Kromě případů, kde je uvedeno jinak, licence tohoto záznamu je CC BY-NC-ND 4.0