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AACL BIOFLUX
Aquaculture, Aquarium, Conservation & Legislation International Journal of the Bioflux Society

Considerations upon energetic efficiency of a recirculating aquatic system (RAS) for super intensive fish culture
Petru David, Augustin Pop, and Valentin Popovici
INMA Bucharest (Institutul Național de cercetare-dezvoltare pentru Mașini și instalații destinate Agriculturii șiindustriei alimentare) Corresponding author: Petru David, e-mail: inmatm_david@yahoo.com

Abstract. The efficiency of the aquaculture using recirculating systems depends on many factors among which the most important it is the energy consumption of the system. To assure a high level energy conservation in an aquatic recirculating system, the intensity of water recirculation must be maximized, but thisleads to a increasing of the consumed energy for water circulation. That is why is required a rigorous analysis for the energetic consumption for a system of this type and establishment of optimum solutions to minimize the consumption. This paperwork presents a detailed analysis of the energy consumption for a recirculating aquatic system for fish breeding, as well as considerations and solutionsfor optimization of the energy consumption. key words: fish breeding, super intensive, system, aquatic, energetic consumption. Rezumat. Eficienţa acvaculturii practicată in sistemele cu recirculare depinde de mai mulţi factori, printre care cel mai important este energia consumată de sistem. Pentru a asigura un grad de conservare al energiei ridicat, intr-un sistem acvacol recirculant, trebuiemaximizat gradul de recirculare al apei. Dar acest lucru conduce la creşterea energiei consumate pentru vehicularea apei. Din acest motiv se impune o analiză riguroasă a consumului energetic al unui astfel de sistem şi stabilirea soluţiilor optime pentru diminuarea acestuia. Lucrarea prezintă o analiză detaliată a consumului de energie al unui sistem acvacol recirculant de creştere superintensivă apeştilor, precum şi consideraţii şi soluţii în direcţia reducerii acestuia. Cuvinte cheie: creşterea peştilor, superintensiv, sistem, acvacol, recirculant, consum energetic. Résumé. L'efficacité de l'aquaculture pratiquée dans les systèmes avec recirculation dépend de plusieurs facteurs, parmi lesquels le plus important est l'énergie consommée par le système. Afin d'assurer un haut degré deconservation de l'énergie dans un système acvacol recirculant, il faut maximiser le degré de recirculation de l'eau. Mais cela conduit à une augmentation d'énergie pour véhiculer l'eau. Pour cette raison, il exige une analyse rigoureuse de la consommation d'énergie d'un tel système et établir les meilleures solutions pour la réduire. Le papier présente une analyse détaillée de la consommation d'énergied'un système acvacol recirculant pour la croissance super intensive des poissons, ainsi que des considérations et des solutions pour la réduire. Mots-clés: croissance du poisson, super intensive, système, acvacol, recirculant, consommation d'énergie.

Introduction. Traditional aquaculture production in ponds requires large quantities of water and as well as vast land surfaces. For flooding a pondwith a surface of 1 ha are required approximately 9500 mc of water, and to compensate for evaporation and seepage a same amount of water is needed. In this conditions to produce 5000 kg fish/ha the water consume will be very high, about 0.9 mc water/kg of fish. That’s why in many of Romania areas pond aquaculture is not possible due to the limited water reserves or the lack of fields suitable forpond construction. Recirculating aquaculture production systems may offer an alternative to pond aquaculture technology. Through water treatment and reuse, recirculating systems use a fraction of the water required by ponds to produce similar yields. Because recirculating

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systems usually use different types of tanks dense populated, to obtain the culture product, the requirement...
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