The addition of simple biological filters of different capacity to semi-recirculating fish rearing system and its effects

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F17%3A43912906" target="_blank" >RIV/62156489:43210/17:43912906 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.11118/actaun201765020441" target="_blank" >https://doi.org/10.11118/actaun201765020441</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.11118/actaun201765020441" target="_blank" >10.11118/actaun201765020441</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The addition of simple biological filters of different capacity to semi-recirculating fish rearing system and its effects

Popis výsledku v původním jazyce

Aquaculture 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.

Název v anglickém jazyce

The addition of simple biological filters of different capacity to semi-recirculating fish rearing system and its effects

Popis výsledku anglicky

Aquaculture 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.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

40103 - Fishery

Projekt

<a href="/cs/project/QJ1210013" target="_blank" >QJ1210013: Technologie chovu sladkovodních ryb s využitím recirkulačních systémů dánského typu se zaměřením na metody efektivního řízení prostředí a veterinární péče.</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis

ISSN

1211-8516

e-ISSN

—

Svazek periodika

65

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

6

Strana od-do

441-446

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85018456691