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Dissertations / Theses on the topic 'Recirculating Aquaculture System'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Le, Van Khoi. "Nutrient cycle in an integrated recirculating aquaculture system." Thesis, Curtin University, 2012. http://hdl.handle.net/20.500.11937/1916.

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Intensive marine aquaculture may cause negative impacts on the aquatic environment by causing water pollution, algae bloom and reduction in biodiversity of the surrounding aquatic environment. The nutrient-rich effluents from aquaculture activities contain nitrogen and phosphate which serve as a nutrient source for bivalve, algae and invertebrates. Seaweed and mussels have been integrated with marine species in culture systems to remove the waste from aquaculture farms. The research has explored the nutrient uptake capacities of green seaweed (Ulva lactuca) and blue mussel (Mytilus edulis) int

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2

Parker, Edward V. "Oxygen management at a commercial freshwater recirculating aquaculture system." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0032/MQ65513.pdf.

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3

Montorio, Luca. "Assessment of a novel filter system for recirculating aquaculture." Thesis, University of Stirling, 2004. http://hdl.handle.net/1893/25419.

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The aim of this project was to investigate the usage of manganese dioxide ore as a bio-filter media to remove metabolites in aquaculture closed system, and to determine whether manganese toxicity would at the same time represent a risk to fish. Initial work investigated the physical properties of manganese dioxide and its chemical interaction with ammonia and nitrite in the absence of biological activity. Subsequently, two pilot-scale pressurised filters were installed in a commercial scale hatchery in order to compare the metabolite removal performance of manganese dioxide against silicate sa

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4

Singh, Sahdev. "Modeling thermal environment of a recirculating aquaculture system facility." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-12302008-063343/.

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5

Bst, Neil A. (Neil Andrew). "Preliminary design of a recirculating aquaculture system in Boston Harbor." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10275.

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6

Yates, J. Kevin. "Production economics of summer flounder Paralichthys dentatus aquaculture in a recirculating system /." Electronic version (PDF), 2004. http://dl.uncw.edu/etd/2004/yatesj/jkevinyates.pdf.

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7

Guan, Lu. "Nitrogen Removal from Closed Aquaculture System by Bio-electrochemical System." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/91468.

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Removal of nitrogen elements 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 often an integrate part of filtration in RAS to remove ammonium via nitrification. However, nitrate accumulation via nitrification in RAS is often observed during the operation, which is usually solved by replacing with the fresh water into the system. With the concern of

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8

Myers, Amanda R. ""Recirculating aquaculture system integration of bivalve culture for effluent nutrient composition reduction" /." Electronic version (PDF), 2006. http://dl.uncw.edu/etd/2006/myersa/amandamyers.pdf.

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9

Farzad, Razieh. "Novel Aquafeed Towards A Sustainable Aquaculture." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/103810.

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With World Health Organization estimation of population increase to over 9 billion by 2050, malnutrition and food insecurity are predicated to be two of the main challenges facing the world in the future. Fish is a source of protein that can have a significant contribution for solving the global food crisis. Fish for human consumption is provided by both the aquaculture industry and the capture fisheries, however, the flat-lined production of seafood from capture fisheries means aquaculture production should double in number to provide enough protein by 2050. Culturing fish at higher densities

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10

Ardiansyah. "Efficacy of duckweed (Lemna minor Linnneus) integrated in barramundi recirculating aquaculture system (RAS)." Thesis, Curtin University, 2018. http://hdl.handle.net/20.500.11937/81910.

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Six experiments were conducted to evaluate nitrogen uptake capacities of duckweed in barramundi recirculating aquaculture systems (RAS). Harvesting duckweed every four days increased the abundance and diversity of both heterotrophic and phosphate-solubilising bacteria, and maximised nitrogen uptake efficiency. A stocking density of less than 18.75 kg m-3 is recommended for culturing barramundi in integrated RAS. The inclusion of fermented duckweeds up to 35% is feasible without adversely affecting growth and physiological parameters of barramundi.

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11

Nunley, Chad E. "Production of hybrid striped bass (Morone chrysops x Morone saxatilis) in a recirculating aquaculture system." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-08222009-040454/.

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12

Phillips, Jennifer Brooke. "Denitrification of Recirculating Aquaculture System Waters Using an Upflow Biofilter and a Fermented Substrate." Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/31068.

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The ability of an upflow, denitrifying biofilter using a fermentation generated carbon source to treat the 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 generated volatile fatty acids (VFA) in the form of acetic, propionic, isobutyric, n-butyric, 2-methylbutyric, 3-methylbutyric, and n-valeric acids. Acetic and propionic acids were the predominant con

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13

Gorman, Jacob Adrian John. "Economic feasibilty of utilizing saline groundwater of West Alabama to produce Florida pompano in a recirculating aquaculture system." Auburn, Ala, 2009. http://hdl.handle.net/10415/1692.

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14

Johnson, William P. "An investigation of the effects of ozone in a recirculating aquacultural production system." Thesis, Virginia Tech, 1991. http://hdl.handle.net/10919/41914.

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<p>The use of ozone in a recirculating aquacultural production system on a commercial scale was investigated. ozonation was responsible for statistically significant differences in all test parameters, including: heterotrophic plate count, total coliforms, fecal coliforms, total solids, and total volatile solids. Results indicated ozone had a significantly positive effect in the recirculating aquacultural production system. Further study is recommended, however, to better understand the effects of ozone and to justify economically the use of ozone in commercial systems.<br>Master of Science

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15

Holliman, James Bret Adrian John. "An economic analysis of integrating hydroponic tomato production into an indoor recirculating aquacultural production system." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Fall/Theses/HOLLIMAN_JAMES_4.pdf.

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16

Easter, Christopher. "Water chemistry characterization and component performance of a recirculating aquaculture system producing hybrid striped bass." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-10102009-020254/.

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17

Mccarthy, Brian. "Modeling Nitrogen Transformations in a Pilot Scale Marine Integrated Aquaculture System." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4725.

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Integrated aquaculture systems (IAS) are a type of recirculating aquaculture systems (RAS) where the wastewater is treated and returned to the fish tanks. The important difference between the two is that in an IAS, wastes from the aquaculture component are recovered as fertilizer to produce an agricultural product whereas in an RAS, waste organics, nutrients and solids are treated and discharged. A pilot marine IAS at Mote Aquaculture Research Park in Sarasota, FL was studied for this project. Water quality monitoring, measurements of fish health and growth rates of fish and plants were perf

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18

King, Robin K. "The Presence of Pathogenic Bacteria in Recirculating Aquaculture System Biofilms and their Response to Various Sanitizers." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/27185.

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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, incorporating the various microflora present in the water. Pathogenic microorganisms released from the biofilms are capable of causing recurring exposure to disease in both fish and humans. With the increased consumption of raw and rare fish, the presence of these bacteria in or on the fish could

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19

David, Christopher Graham. "Assessment of stress and growth of the eel Anguilla anguilla in a closed recirculating aquaculture system." Thesis, University of St Andrews, 1997. http://hdl.handle.net/10023/14935.

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1) Closed recirculating intensive aquaculture potentially offers major advantages over existing technologies including reduction in normal production time, reduced water input and output and beneficial environmental effects. 2) The major aim of this study was to produce a basic scientific understanding of the factors that affect intensive recirculating culture of the European eel Anguilla anguilla in order to increase efficiency and economic viability of eel aquaculture in the E.U. 3) Unlike some intensively farmed fish such as salmonids little is known of the stress factors affecting optimal

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20

Herbst, Jennifer Lynn. "The effects of ozone treatment on chemical parameters of a recirculating aquaculture system producing hybrid striped bass." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/40666.

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The hypothesis tested in this 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 control and four ozonated systems with doses of 3, 13, 25, and 45 g O3/kg feed/day supported fish for experimentation but, due to mechanical failure, only the control, the 13 and 25 g O3/kg feed/day treatments completed the full 35 week study. On an equal feeding basis, conc

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21

Lakeh, Amir Abbas Bazyar. "Effect of low frequency ultrasound and ultraviolet-C light for water disinfection in recirculating aquaculture systems." Doctoral thesis, Humboldt-Universität zu Berlin, Lebenswissenschaftliche Fakultät, 2015. http://dx.doi.org/10.18452/17146.

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In der Aquakultur sind Kreislaufanlagen ein umweltfreundliches und wassersparendes Produktionsverfahren. Hohe Besatzdichten und das Prinzip der Wasserführung im Kreislauf führen jedoch auch zu einem erhöhten Risiko von Infektionskrankheiten. In dem hier beschriebenen Projekt wurde untersucht, wie sich niederfrequenter Ultraschall (nf-US) in Kombination mit der in der Aquakultur bewährten UV-C Bestrahlung zur Kontrolle von Pathogenen einsetzen lässt. Es wurden vergleichende Untersuchungen zur Effizienz von nf-US, UV-C und deren Kombination gegen prokaryotische und eukaryotische Modellorganisme

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22

Stiller, Kevin Torben [Verfasser]. "The technical development and application of a recirculating aquaculture respirometer system (RARS) for fish metabolism studies / Kevin Torben Stiller." Kiel : Universitätsbibliothek Kiel, 2016. http://d-nb.info/1102933147/34.

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23

Brazil, Brian Ligar. "Impact of Ozonation on System Performance and Growth Characteristics of Hybrid Striped Bass (Morone chrysops (f) x Morone saxatilis (m)) Reared in Recirculating Aquaculture Systems." Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/30379.

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This study was conducted to evaluate the impact of sustained ozone dosages rates (0, 3, 13, 25, and 45 g O3 per kg feed delivered per day)on water quality profile, fish physiology, and growth during a production cycle of hybrid striped bass reared in pilot scale recirculating systems. Nitrogenous wastes and dissolved organic compounds increased linearly (p < 0.01) throughout the trial under both ozonated and unozonated conditions. Ozone treatments 13 and 25 g O3 / kg feed received 170 kg more feed than the control treatment (0 g O3 / kg feed) by the end of trial. The ozonated system received a

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24

Mair, Rachel Alice. "A suitable diet and culture system for rearing juvenile freshwater mussels at White Sulphur Springs National Fish Hatchery, West Virginia." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/23153.

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Propagation and culture has been accepted as an approved aquaculture method for resource managers to enhance and recover freshwater mussel populations. Although juveniles can be produced readily for many mussel species, achieving high growth and survival in the laboratory remains difficult. The goal of my project was to improve growth and survival of juvenile mussels by comparing diets, algae concentration, and culture systems. The first objective determined a suitable diet for feeding juvenile northern riffleshell, Epioblasma torulosa rangiana, a species listed as federally endangered. Thr

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25

Maigual, Enriquez Yemall Alexander. "Utilização de reator aeróbio de leito fluidizado com circulação em tubos concêntricos no tratamento de águas residuarias da produção intensiva de tilapia com recirculação da água tratada /." Ilha Solteira : [s.n.], 2011. http://hdl.handle.net/11449/99881.

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Orientador: Tsunao Matsumoto<br>Banca: Alexandre Ninhaus Silveira<br>Banca: Katt Reginal Lapa<br>Resumo: Sistemas de Recirculação para Aquicultura (SRA) possibilitam um meio alternativo de produção de peixes para áreas com limitada disponibilidade de água. Estes sistemas de cultivo intensivo de peixes oferecem potencial de produção em pequena escala assim como em grande escala, devido a recuperação de efluentes e a reutilização da água, produzindo volumes relativamente pequenos de resíduos líquidos e sólidos. O objetivo deste estudo foi determinar a eficácia do tratamento de águas residuárias

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26

Seemann, Uli Bernd [Verfasser], Bela H. [Akademischer Betreuer] Buck, Bela H. [Gutachter] Buck, and Christian [Gutachter] Wild. "Sustainable rearing of crayfish in a recirculating aquaculture system using the example of Astacus astacus / Uli Bernd Seemann ; Gutachter: Bela H. Buck, Christian Wild ; Betreuer: Bela H. Buck." Bremen : Staats- und Universitätsbibliothek Bremen, 2019. http://d-nb.info/1200547179/34.

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27

Osório, João Vasco de Carvalho. "Mucosal and physiological responses of Atlantic salmon (Salmo salar) in brackish water RAS following peracetic acid-based disinfection." Master's thesis, Universidade de Lisboa, Faculdade de Medicina Veterinária, 2020. http://hdl.handle.net/10400.5/20695.

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Dissertação de Mestrado Integrado em Medicina Veterinária<br>Peracetic acid (PAA), a strong oxidative disinfectant, is effective against several microorganisms at low concentrations, requires short contact time and degrades rapidly into innocuous residues, thus considered a promising option for routine disinfection in aquaculture production. However, comprehensive knowledge of the impacts of the oxidant PAA on fish health is required for its safe application. This study documented the physiological impacts of periodic PAA exposure in Atlantic salmon (Salmo salar) post-smolts reared in brackis

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28

Leal, Margarida Meneses. "Effect of alternative fish feed and electricity independent oxygenation in decoupled aquaponic systems." Master's thesis, Universidade de Lisboa, Faculdade de Medicina Veterinária, 2022. http://hdl.handle.net/10400.5/23561.

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Dissertação de Mestrado Integrado em Medicina Veterinária<br>Aquaponic systems combine Recirculating Aquaculture Systems (RAS) and hydroponic systems, combining the production of animal protein and plants. RAS wastewater enriched in nutrients is used by plants in hydroponic units. RAS rely on fishmeal and fish oil, which are finite resources as aquafeed ingredients, but alternative and more sustainable ingredients have been developed; black soldier fly (Hermetia Illucens) meal is one of the most promising alternatives. Therefore, the aim of experiment 1 was to investigate if using a fishmeal b

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29

Maigual, Enriquez Yemall Alexander [UNESP]. "Utilização de reator aeróbio de leito fluidizado com circulação em tubos concêntricos no tratamento de águas residuarias da produção intensiva de tilapia com recirculação da água tratada." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/99881.

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Made available in DSpace on 2014-06-11T19:30:23Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-08-22Bitstream added on 2014-06-13T20:20:51Z : No. of bitstreams: 1 maigualenriquez_ya_me_ilha.pdf: 1515184 bytes, checksum: 854b45266358b64c6017c5058af88c81 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Sistemas de Recirculação para Aquicultura (SRA) possibilitam um meio alternativo de produção de peixes para áreas com limitada disponibilidade de água. Estes sistemas de cultivo intensivo de peixes oferecem potencial de produção em pequena escala assim como

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30

Bohman, Marcus, and Per Magnusson. "Smakprofil av Tilapia (Niltilapia) : en jämförelse av vakuumförpackad Tilapia över tid." Thesis, Högskolan Kristianstad, Sektionen för lärande och miljö, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-15556.

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Fler svenskar vill konsumera mer inhemskt producerad fisk. Scandinavian Aquasystems odlar och försöker introducera fisken tilapia på svenska marknaden. Tilapia är en fisk som precis börjat göra intåg i Europa men är stor runtomkring resten av världen. En smakprofil som berättar hur länge produkten är sensoriskt tjänlig kan vara av hjälp. Denna undersökning syftade till att skapa en sensorisk smakprofil för fisken tilapia och till att se hur smakprofilen förändrades vid lagring i vakuumförpackning. För att skapa smakprofilen användes metoden QDA. Resultatet gav många egenskapsord var av vissa k

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31

Tollervey, Alan. "Algal nutrient uptake in recirculating aquaculture systems." Thesis, Heriot-Watt University, 1985. http://hdl.handle.net/10399/1651.

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32

Bartelme, Ryan P. "Cultivating Ecosystems| Microbial Communities in Recirculating Aquaculture Systems." Thesis, The University of Wisconsin - Milwaukee, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10843723.

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<p> Intensive cultivation of fish is necessary to meet future global market demands. Recirculating aquaculture systems (RAS) enable dense growth of fish, while occupying less space than traditional aquaculture farms. However, RAS often experience complications and high fish mortalities due to disease and improper waste management. In properly functioning systems, the microorganisms associated with fish (gut, scales) as well as those found in the system environment (water, component surfaces) remove waste and maintain fish health by discouraging growth of opportunistic pathogens. Previous RAS m

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33

Torno, Johann [Verfasser]. "Innovations for nitrate removal in recirculating aquaculture systems / Johann Torno." Kiel : Universitätsbibliothek Kiel, 2018. http://d-nb.info/117067500X/34.

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34

Wood, Luther G. "Modeling effects of U-tube aeration in recirculating aquaculture systems." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-10312009-020150/.

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35

Emerman, Joshua David. "Establishing the optimal salinity for rearing salmon in recirculating aquaculture systems." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/57067.

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Aquaculture of salmon worldwide is a 15.3 billion dollar industry and the majority of fish are produced in net-pen systems in coastal waters. Recently producers have begun investigating the feasibility of moving salmon production onto land and into recirculating aquaculture systems (RAS). The major downsides to RAS are the startup and operational costs; however the ability to optimize many environmental variables to enhance growth and feed conversion, something impossible to do in net-pen systems, may help defray these otherwise prohibitive costs. Salinity may be the most important of these va

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36

SIVAKUMAR, NITHIN. "Design of fish feeding mechanism for Recirculation Aquaculture System (RAS)." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-281740.

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Fish farming or Aquaculture is a growing food-producing industry to culture the fish in artificially constructed tanks. A large number of fishes are reared in tanks for 100-150 days and produce food for the population. With increasing population and declining worldwide capture fishery, Aquaculture is perceived as a potential technique to meet the ever-expanding food demand without tarnishing the aquatic food chain. However, problems which are addressed in current systems like human intervention and unused feed material inhibit the production rate. This thesis provides methods and guidelines to

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37

Stoneham, Tyler Robert Jeffery. "Development of Omega-3-Fatty Acid Enriched Finishing Feed and Value Added Tilapia Product." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/81383.

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Despite being a low fat fish and consequently a low omega-3 fish, tilapia have widespread consumer acceptability due to its mild taste, cheap price and low mercury content. However some sources claim that farmed tilapia can be detrimental to human health due to high omega-6:3 ratios and low omega-3 content specifically eicosapentaenoic acid, docosapentaenoic acid, and docosahexaenoic acid. The objective of this study was to create an omega-3 enriching feed that would increase omega-3 content in tilapia and subsequently decrease the omega-6:3 ratio. An 8 week feeding trial was conducted. Tilap

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38

Miranda, Mário Olindo Tallarico de. "Cultivo de surubim pintado (Pseudoplatystoma corruscans) e híbrido (P. reticulatum X P. corruscans) em sistema de recirculação de água." Universidade Federal de São Carlos, 2012. https://repositorio.ufscar.br/handle/ufscar/1786.

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Made available in DSpace on 2016-06-02T19:29:53Z (GMT). No. of bitstreams: 1 4560.pdf: 1880275 bytes, checksum: 259fd9d9b3aeb99130c54c0ee0f5af82 (MD5) Previous issue date: 2012-05-31<br>This study aimed to test a pilot recirculating aquaculture system (RAS) and to evaluate in this system the effects of the stocking density on the production of species of surubim pintado , Pseudoplatystoma corruscans, and its hybrid with P. reticulatum regarding the effect of stocking density and water renewal rate on the hybrid production. The study lasted for 84 days. The physical and chemical conditions i

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Shank, Dale. "Evaluating carbon dioxide as a causative agent of otolith crystallization in recirculating aquaculture systems." Bowling Green State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1603716784275007.

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40

Kodra, Bledar. "Risk Analysis of Tilapia Recirculating Aquaculture Systems: A Monte Carlo Simulation Approach." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/31845.

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The purpose of this study is to modify an existing static analytical model developed for a Re-circulating Aquaculture Systems through incorporation of risk considerations to evaluate the economic viability of the system. In addition the objective of this analysis is to provide a well documented risk based analytical system so that individuals (investors/lenders) can use it to tailor the analysis to their own investment decisions—that is to collect the input data, run the model, and interpret the results. The Aquaculture Economic Cost Model (AECM) was developed by Dr. Charles Coale, Jr. and oth

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41

Hall, Antar Gamble. "A Comparative Analysis of Three Biofilter Types Treating Wastewater Produced in Recirculating Aquaculture Systems." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/30796.

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Nine recirculating systems at the Virginia Tech Aquaculture Center were placed on line and stocked with yellow perch, <I>Perca flavescens</I>, fingerlings. Fish were stocked at a density of approximately 455 fish m³. Biofilter types were the only factor differing among system designs and were an upflow pulsed bed bead filter, packed tower trickling filter and a rotating biological contactor (RBC). After stocking, systems were allowed to acclimate using ammonia excreted by the yellow perch. Following acclimation, a comparative analysis on biofilter performance began. To evaluate filter performa

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42

Steinberg, Kathrin [Verfasser]. "Accumulating substances and their effects on pikeperch (Sander lucioperca) in recirculating aquaculture systems / Kathrin Steinberg." Kiel : Universitätsbibliothek Kiel, 2018. http://d-nb.info/1169132588/34.

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43

Ling, Jian. "Nitrification and the impact of organic matter in fixed-film biofilters application to recirculating aquaculture systems /." Online access for everyone, 2005. http://www.dissertations.wsu.edu/Dissertations/Fall2005/J%5FLing%5F122105.pdf.

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44

Sandu, Simonel Ioan. "Evaluation of ozone treatment, pilot-scale wastewater treatment plant, and nitrogen budget for Blue Ridge Aquaculture." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/11271.

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Sustainable tilapia production at Blue Ridge Aquaculture (BRA) is constrained by availability of high quality replacement water. I developed a pilot-scale wastewater treatment system to treat and reuse effluent presently discharged. An initial study was conducted to determine the response of the BRA waste stream to ozone application. Dosages of 6.9, 4.8 and 2.4 g O3 were applied for 30 minutes to 35 L of settled effluent. Optimum ozone dosage and reaction time, ozone transfer efficiency, ozone yield coefficient, degree of pollutant removal, and other ozone and water quality parameters were de

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45

Hansen, Per. "Potentiell koppling mellan elektrolys och landbaseradfiskodling : En analys av behov och tillgång på syrgas och värme." Thesis, Högskolan i Gävle, Miljövetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-36512.

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Det kommer ske en stor utbyggnad av elektrolys för produktion av vätgas i Sverigeoch övriga världen. För att sänka produktionskostnaden och därmed göra vätgasenbilligare analyserar denna rapport vilket behov av syrgas och värme som en landbaserad fiskodling har, samt hur mycket syrgas och värme fiskodlingen skulle behövaköpa från en elektrolysör. Analysen visar att de arter som används i studien - tilapia(Oreochromis, Oreochromis,. Alcolapia), regnbåge (Oncorhynchus mykiss) och lax(Salmo salar) - i en odling som producerar 40 ton fisk om året skulle förbruka cirka1,16 procent av syrgasen och c

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Schmitz, Mark Harvey. "Comparative Growth of All-Female Versus Mixed Sex Yellow Perch (Perca flavescens) in Recirculating Aquaculture Systems." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/42798.

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Nine, production-scale, recirculating aquaculture systems were utilized to compare the growth parameters between all-female and mixed sex yellow perch stocks. Each system was stocked with 455 fish m-3 and contained one of three different biofilter types: a rotating biological contactor, a trickling filter or a bead filter. The all-female fingerlings (S1) used were originally derived from Lake Mendota, Wisconsin. The mixed-sex fingerlings (S2) used were originally derived from Lake Erie. Temperature and photoperiod (23oC, 16H-L) were maintained at levels for optimal growth. Absolute g

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Ferreira, Catarina Isabel Almeida. "Production and application of biowaste-based adsorbents for the removal of fish anaesthetics in recirculating aquaculture systems." Doctoral thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/18042.

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Doutoramento em Ciências e Engenharia do Ambiente<br>A partir de 1960 a atividade aquícola aumentou abruptamente, tornando-se o setor de produção de alimentos de maior crescimento. A implementação de sistemas de aquacultura intensiva contribuiu para esse acentuado desenvolvimento; contudo, a sua prática impõe elevados riscos relativos ao bem-estar dos peixes, tornando-os vulneráveis a doenças, stress e a condições ambientais adversas. Para o controlo do stress são utilizados anestésicos, sendo os mais comuns a tricaína, benzocaína e 2-fenoxietanol. Estes fármacos são administrados solubilizand

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Rodriguez-Gonzalez, Laura C. "Advanced Treatment Technologies for Mitigation of Nitrogen and Off-flavor Compounds in Onsite Wastewater Treatment and Recirculating Aquaculture Systems." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6941.

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Non-point sources (NPS) of pollution are non-discernable, diffuse sources of pollution that are often difficult to localize and in turn mitigate. NPS can include stormwater runoff, agricultural/aquaculture wastes and wastes from small decentralized wastewater treatment systems, such as conventional septic systems. The mitigation of these NPS is imperative to reduce their potential detrimental effects on the water environment. This dissertation addresses novel treatment technologies for the mitigation of nutrients, particularly nitrogen, in Recirculating Aquaculture Systems (RAS) and onsite was

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Kostrytsia, Anastasiia. "Bioengineering optimization and microbial characterization of elemental sulfur-fueled denitrifying biofilms Nitrate removal effectiveness of fluidized sulfur-based autotrophic denitrification biofilters for recirculating aquaculture systems (2015) Aquacultural Engineering, 68, pp. 10-18." Thesis, Paris Est, 2018. http://www.theses.fr/2018PESC2188.

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De nos jours, la croissante population humaine et les ressources en eau limitées créent une demande pour des technologies durables de traitement des eaux usées. La dénitrification autotrophe à base de soufre élémentaire (S0) synthétisée chimiquement est une biotechnologie efficace et rentable pour l'élimination des nitrates (NO3-) des eaux usées carencées en substances organiques. Cependant, les propriétés hydrophobes du S0 synthétisé chimiquement limitent son utilisation pour la dénitrification. Par conséquent, l’objectif général de ce projet est d’optimiser les performances et d’explorer les

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Nam, Koong Hansup [Verfasser], Carsten [Akademischer Betreuer] Schulz, and Eberhard [Gutachter] Hartung. "Water treatment in Recirculating Aquaculture Systems (RAS) by ultrasonically induced cavitation / Hansup Nam Koong ; Gutachter: Eberhard Hartung ; Betreuer: Carsten Schulz." Kiel : Universitätsbibliothek Kiel, 2020. http://d-nb.info/1229436286/34.

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