Stimulating Denitrification in a Marine Recirculating Aquaculture System Biofilter Using Granular Starch as a Carbon Source

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dc.contributor.authorSchreier, H. J.en
dc.contributor.authorTal, Y.en
dc.contributor.authorMorrison, M. M.en
dc.contributor.editorSmith, Stephen Allenen
dc.date.accessioned2019-06-25T16:55:28Zen
dc.date.available2019-06-25T16:55:28Zen
dc.date.issued2008-06-01en
dc.description.abstractMaintaining superior water quality in intensive recirculating aquaculture systems (RAS) by controlling levels of inorganic nitrogenous waste—ammonia, nitrate and nitrite—derived from uneaten food and fecal excretion is often a challenge. In most systems, solids are removed mechanically and ammonia is oxidized to nitrate by nitrifying biological filtration; nitrate is subsequently eliminated through numerous water exchanges. Alternatively, nitrate removal is achieved using a bacterial-mediated denitrification component that reduces nitrate to nitrogen gas under anoxic conditions, a process that depends on the application of external or endogenous electron and carbon donors, e.g. carbohydrates or organic alcohols. In this study, we compared the capacity of acetate, glucose, soluble starch, and granular starches to promote the denitrifying activity of heterotrophic bacteria in biofilm-coated polyethylene beadsfrom a marine RAS moving bed bioreactor (MBB) under anaerobic conditions. Granular starches (corn, wheat, and rice) were as effective as glucose in supporting denitrification, and were 7.6 and 9.8 times more effective in removing nitrate when compared to soluble starch and acetate, respectively. Furthermore, granular starches retained their denitrification potential for longer time periods than soluble starch or acetate. The low cost, ease of use, and non-toxic nature of granular starches make them an ideal exogenous carbon source for promoting denitrification in RAS bioreactors.en
dc.format.extent19 pagesen
dc.format.extent657.43 KBen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationSchreier, H.J., Tal, Y. and Morrison, M.M., 2008. Stimulating Denitrification in a Marine Recirculating Aquaculture System Biofilter Using Granular Starch as a Carbon Source. International Journal of Recirculating Aquaculture, 9(1). DOI: http://doi.org/10.21061/ijra.v9i1.1423en
dc.identifier.doihttps://doi.org/10.21061/ijra.v9i1.1423en
dc.identifier.eissn2572-9160en
dc.identifier.issn1547-917Xen
dc.identifier.issue1en
dc.identifier.urihttp://hdl.handle.net/10919/90623en
dc.identifier.volume9en
dc.language.isoenen
dc.publisherCommercial Fish and Shellfish Technologies Program, Virginia Techen
dc.rightsIn Copyrighten
dc.rights.holderCommercial Fish and Shellfish Technologies Program, Virginia Techen
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectFixed Bed Biofilteren
dc.subjectRecirculating Aquacultureen
dc.titleStimulating Denitrification in a Marine Recirculating Aquaculture System Biofilter Using Granular Starch as a Carbon Sourceen
dc.title.serialInternational Journal of Recirculating Aquacultureen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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