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Showing 1 to 20 of 23 for “"Recirculating Aquaculture System"”.
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Modeling thermal environment of a recirculating aquaculture system facility
Economic viability of fish production in recirculating aquaculture system (RAS) facility depends on minimizing the energy requirements of operating such facilities. The fish growth and water quality aspects of RAS have been studied in considerable details. However, the understanding of the thermal …
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Preliminary design of a recirculating aquaculture system in Boston Harbor
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1997.
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Investigation of the Microbiome of a Recirculating Aquaculture System (RAS) for Crassostrea virginica Larvae
<p>Recirculating Aquaculture Systems (RAS) offer control over physicochemical and biological factors impacting aquaculture success. One understudied facet of RASs is the water microbiome. Oyster larval microbiomes are shaped by their aquatic microbiomes. Understanding the dynamics of and the …
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Denitrification of Recirculating Aquaculture System Waters Using an Upflow Biofilter and a Fermented Substrate
… high nitrate concentrations typically seen in recirculating aquaculture systems was studied using a synthetic nitrate wastewater supplied at two nitrate loadings, 1.13 and 2.52 kg NO3-N/m3/day. A supplemental carbon source was provided primarily through the fermentation of fish food which …
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Production of hybrid striped bass (Morone chrysops x Morone saxatilis) in a recirculating aquaculture system
… saxatilis</i> male) cultured in pilot-scale recirculating aquaculture systems. Hybrid striped bass were stocked in nine 12,500 liter recirculating systems at a mean density of 149 fish/m³. Mean weight at stocking was 40.6 g. Overall survival averaged 72.5%. One system experienced 100% …
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Water chemistry characterization and component performance of a recirculating aquaculture system producing hybrid striped bass
Eight identical and independent pilot scale recirculating aquaculture production systems were populated with fingerling hybrid striped bass <i>(Morone chrysops</i> female x <i>Morone saxatilis male</i>). Three population densities were established with two replicates at 132 fishlm3 and three …
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The Presence of Pathogenic Bacteria in Recirculating Aquaculture System Biofilms and their Response to Various Sanitizers
Recirculating aquaculture offers a prospect for successful fish farming, but this form of aquaculture presents a great potential for pathogenic microorganisms to become established in the system through the formation of biofilms. Biofilms are capable of forming on all aquaculture system components, …
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The feasibility of a commercial-scale recirculating aquaculture system integrating sea urchins (Tripneustes gratilla) and seaweed (Ulva)
… could be suitable co-candidates for a land-based recirculating Integrated MultiTrophic Aquaculture (IMTA) system. This IMTA system is suggested to be sustainable and efficient, primarily because the Ulva would simultaneously provide bioremediation of effluent and a substantial feed source for T. …
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The effects of ozone treatment on chemical parameters of a recirculating aquaculture system producing hybrid striped bass
… study is that the application of ozone to reuse aquaculture water provides more favorable conditions for hybrid striped bass at production levels. Evaluation of water quality in fish culture systems being treated with ozone was made during a production trial (1200 fish/14,OOO 1). Originally, a …
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The development of a modular integrated recirculating aquaculture system using Porphyra (nori) for the bioremediation of marine finfish effluent
<p>It is crucial for the development of the fish aquaculture industry to be managed in a way that provides a reliable, long term source of products without negatively impacting the environment. The simplest form of integrated multi-tropic aquaculture (IMTA) uses a fed component (e.g. finfish) and …
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A computer simulation model for wastewater management in an integrated (fish production-hydroponics) system
Intensive fish production in a recirculating aquaculture system facility is a complex bioengineering operation involving a sensitive balance among physiological, water quality, and management components of the overall system. Warm and nutrient-rich wastewater discharged from controlled-environment …
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Modeling effects of U-tube aeration in recirculating aquaculture systems
… equipment design and operation in high density recirculating aquaculture systems (RAS) requires consideration of the effects of RAS component design, water quality, and biological processes on oxygen transfer requirements. A computer model was developed to simulate multi-component gas transfer …
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Quality changes of aquacultured hybrid striped bass fillet meat resulting from reduction of post-harvest metabolism
… bass (Sunshine Bass) were raised in an indoor recirculating aquaculture system incorporating concrete culture tanks, sump tanks, rotating biological contactors and liquid oxygen injection and underground U-tubes for aeration. Fish were anesthetized by two methods after harvest to reduce …
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Using computer simulation to reduce costs at a recirculating aquaculture facility
The Recirculating Aquaculture System can be considered as a dynamic system in which the system variables change instantaneously during the growing period. This effort uses a combination of discrete and continuous simulation to model this system. Changing the values of a certain set of variables …
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Nitrogen Removal from Closed Aquaculture System by Bio-electrochemical System
… in culture water is one of the major concerns in recirculating aquaculture system (RAS). Maintaining a low concentration of nitrogen compounds is essential for a good quality of aquaculture production. Due to fish is very sensitive to the toxic ammonium/ammonia, nitrification biofiltration tank is …
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Development of Omega-3-Fatty Acid Enriched Finishing Feed and Value Added Tilapia Product
… trial was conducted. Tilapia were cultured in a recirculating aquaculture system on one of eight diets (control, commercial, 1, 3, 5% fish oil or 1.75, 5.26, 8.77% ALL-G-Rich (algae). Water quality, selected fish biometrics and growth performance were recorded. Fillet and rib meat tissues were …
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Establishment and Utilization of Tools for Enhancing Foodfish Health
Aquacultured products assist the human demands for seafood so that foodfish supplies can remain sustainable and consistent. Although the fish-farming industry has seen dramatic growth and intensification in recent years, the latter has led to an increase in bacterial diseases and fish health …
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The impacts of stocking stress and largemouth bass predation on the survivorship of juvenile striped bass stocked in Smith Mountain Lake, Virginia
… to 99.5% for Phase II fingerlings (reared in a recirculating aquaculture system for increased size at stocking) in 1994. Mortality rates varied greatly and were probably directly related to length of transport and inadequate thermal tempering prior to stocking. Highest mortality occurred at …
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Long Chain n-3 PUFA and Oleic Acid Modification Strategies to Enhance Fillet Quality in Tilapia, Oreochromis species
… freshwater fish that have become important in aquaculture and as a stable global source of seafood due to their ability to thrive in different environments. However, tilapia are sometimes considered nutritionally undesirable due to their high n-6 to n-3 fatty acid ratios. A market study was …
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Treatment of Wet Fish Sludge with Vermicomposting
Aquaculture, the cultured production of fish, is growing at a rapid pace worldwide. The industry is generating approximately 140,000 cubic meter wastewater per year. For this industry to flourish, viable methods for treating the resulting waste stream must be identified. The various methods were …
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