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Type of publication: Straipsnis konferencijos medžiagoje kitose duomenų bazėse / Article in conference proceedings in other databases (P1c)
Field of Science: Aplinkos inžinerija / Environmental engineering (T004)
Author(s): Žibienė, Gražina;Žibas, Alvydas
Title: The use of zeolite for water quality management in cold water recirculation aquaculture systems
Is part of: Rural development 2019 : research and innovation for bioeconomy (RD2019) [elektroninis išteklius] : 9th international scientific conference, September 26-28, 2019, Agriculture Academy of Vytautas Magnus University. Akademija : Agriculture Academy of Vytautas Magnus University
Extent: p. 1-7
Date: 2019
Note: Edited by prof. Asta Raupelienė
Keywords: Arctic charr;Hybrid charr;Recirculating aquaculture system;Water quality management;Zeolite
Abstract: This study was performed to evaluate use of zeolitefor water quality management in cold water recirculating aquaculture system. The system was reared Arctic charr (Salvelinus alpinus) andHybrid char (Salvelinus fontinalis × Salvelinus alpinus) fry. Fish biomass in the reservoirs was distributed as follows: Arctic charr accounted for 7.32 kg at a density of 23.74 kg∙m-3, and hybrid charr accounted for 7.78 kg at a density of 26.91 kg∙m-3. After increasing the feed rate and documenting water quality studies, a vast increase of ammonium and nitrite concentration was noticed in the rearing tanks. Natural zeolite, known as clinoptilolite with a cation exchange capacity (CEC) of 1.20–1.50 mol.∙kg-1, was used to reduce the amounts of these hazardous substances in the rearing tanks.Zeolite was used to decrease the increased concentration of ammonia and nitrites, which were reduced by 22.7% and 16.7%, respectively, during the study period. These results suggest that zeolite is suitable for water quality management in cold water recirculating aquaculture systemwith as little of an investment as possible
Affiliation(s): Proj. "Trikotaž. geot. įdėklo naudojimas
Vandens ūkio ir žemėtvarkos fakultetas
Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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