Browsing NTNU Open by Author "Navada, Sharada"
Now showing items 1-9 of 9
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Biofilms remember: Osmotic stress priming as a microbial management strategy for improving salinity acclimation in nitrifying biofilms
Navada, Sharada; Vadstein, Olav; Gaumet, Frederic; Tveten, Ann-Kristin; Spanu, Claudia; Mikkelsen, Øyvind; Kolarevic, Jelena (Peer reviewed; Journal article, 2020)With increasing freshwater scarcity and greater use of seawater,fluctuating salinities are becomingcommon in water treatment systems. This can be challenging for salinity-sensitive processes like nitri-fication, especially ... -
Effect of CO2 on elemental concentrations in recirculating aquaculture system tanks
Aslam, Shazia Nusrat; Navada, Sharada; Bye, Gisle Roel; Mota, Vasco C.; Terjesen, Bendik Fyhn; Mikkelsen, Øyvind (Journal article; Peer reviewed, 2019)High levels of carbon dioxide (CO2) and subsequent changes in water quality parameters in recirculating aquaculture systems (RAS) are known to impair fish health, welfare and growth performance. A three-month trial was ... -
Influence of rate of salinity increase on nitrifying biofilms
Navada, Sharada; Vadstein, Olav; Tveten, Ann-Kristin; Verstege, Gerhardus C.; Terjesen, Bendik Fyhn; Mota, Vasco C.; Venkataraman, Vishwesh; Gaumet, Frederic; Mikkelsen, Øyvind; Kamstra, Andries (Journal article; Peer reviewed, 2019)A strategy for rapid increase in salinity with minimal impact on nitrification is important for ammonia removal from saline effluents, especially in recirculating aquaculture systems with high water reuse. To study the ... -
Nitrifying biofilms deprived of organic carbon show higher functional resilience to increases in carbon supply
Navada, Sharada; Knutsen, Maja F.; Bakke, Ingrid; Vadstein, Olav (Peer reviewed; Journal article, 2020)In nitrifying biofilms, the organic carbon to ammonia nitrogen (C/N) supply ratio can influence resource competition between heterotrophic and nitrifying bacteria for oxygen and space. We investigated the impact of acute ... -
Nitrifying biofilms deprived of organic carbon show higher functional resilience to increases in carbon supply
Navada, Sharada; Knutsen, Maja F.; Bakke, Ingrid; Vadstein, Olav (Peer reviewed; Journal article, 2020)In nitrifying biofilms, the organic carbon to ammonia nitrogen (C/N) supply ratio can influence resource competition between heterotrophic and nitrifying bacteria for oxygen and space. We investigated the impact of acute ... -
Oppstart av ferskvanns- og brakkvanns-biofilmreaktorer i RAS: Nitrifikasjonsaktivitet og mikrobiell samfunnstruktur
Sebastianpillai, Marianna (Master thesis, 2019)Atlantisk laks (Salmo salar) i postsmoltfase er sårbar, og i sjømerder utsettes fisken for sykdommer og miljøbetinget stressfaktorer. En lenger oppholdsperiode i landbasert resirkulerende akvakultur system (RAS) kan redusere ... -
Salinity acclimation strategies for nitrifying bioreactors in recirculating aquaculture systems
Navada, Sharada (Doctoral theses at NTNU;2021:33, Doctoral thesis, 2021)The demand for seafood is rising like never before, and unsustainable fishing has depleted the oceans. Recirculating aquaculture systems (RAS) can present a sustainable solution by producing seafood in land-based systems ... -
A salty start: Brackish water start-up as a microbial management strategy for nitrifying bioreactors with variable salinity
Navada, Sharada; Sebastianpillai, Marianna; Kolarevic, Jelena; Fossmark, Ragnhild Olsen; Tveten, Ann-Kristin; Gaumet, Frederic; Mikkelsen, Øyvind; Vadstein, Olav (Peer reviewed; Journal article, 2020)Nitrifying biofilms developed in brackish water are reported to be more robust to salinity changes than freshwater biofilms. This makes them a promising strategy for water treatment systems with variable salinity, such as ... -
Seeding as a start-up strategy for improving the acclimation of freshwater nitrifying bioreactors to salinity stress
Navada, Sharada; Gaumet, Frederic; Tveten, Ann-Kristin; Kolarevic, Jelena; Vadstein, Olav (Peer reviewed; Journal article, 2021)Recirculating aquaculture systems (RAS) for anadromous fish such as salmonids often require salinity changes during the production cycle. However, high or variable salinity can disrupt the biological nitrification process, ...