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dc.contributor.authorHall, Antar Gambleen_US
dc.date.accessioned2014-03-14T20:30:05Z
dc.date.available2014-03-14T20:30:05Z
dc.date.issued1999-12-01en_US
dc.identifier.otheretd-0104100-133802en_US
dc.identifier.urihttp://hdl.handle.net/10919/30796
dc.description.abstractNine recirculating systems at the Virginia Tech Aquaculture Center were placed on line and stocked with yellow perch, Perca flavescens, 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 performance, water quality parameters tested were temperature (°C), pH, dissolved oxygen (DO), total ammonia-nitrogen (TAN), nitrite-nitrogen (NO₂⁻-N), nitrate-nitrogen (NO₃⁻-N), alkalinity (as CaCO₃), water hardness (as CaCO₃), carbonaceous biochemical oxygen demand (cBOD₃), dissolved organic carbon (DOC), and total suspended solids (TSS). Basic water quality analysis encompassed samples drawn at 8 AM. TAN mass removal analysis encompassed water quality samples drawn at 8 AM and over 24 hours. Higher TAN mass removal rates were achieved in trickling and RBC filters than in bead filters for 8 AM (0.037, 0.14, and 0.004 g/m²/d, respectively) and diurnal sample periods. Analysis of areas under mass removal curves depicted RBC filters as surface area limited. Trickling filters proved most effective at carbon dioxide stripping and pH maintenance and also effectively removed TSS from the culture water. The study did not show filter type as having a significant effect on median organic water quality parameter values.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartAntarThesisFinalForm3.pdfen_US
dc.rightsI hereby grant to Virginia Tech or its agents the right to archive and to make available my thesis or dissertation in whole or in part in the University Libraries in all forms of media, now or hereafter known. I retain all proprietary rights, such as patent rights. I also retain the right to use in future works (such as articles or books) all or part of this thesis or dissertation.en_US
dc.subjectwater qualityen_US
dc.subjectbiofiltrationen_US
dc.subjectnitrificationen_US
dc.subjectbiofiltersen_US
dc.subjectorganic wastesen_US
dc.titleA Comparative Analysis of Three Biofilter Types Treating Wastewater Produced in Recirculating Aquaculture Systemsen_US
dc.typeThesisen_US
dc.contributor.departmentFisheries and Wildlife Sciencesen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineFisheries and Wildlife Sciencesen_US
dc.contributor.committeememberBoardman, Gregory D.en_US
dc.contributor.committeememberNovak, John T.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-0104100-133802en_US
dc.contributor.committeecochairHallerman, Eric M.en_US
dc.contributor.committeecochairLibey, George S.en_US
dc.date.sdate2000-01-04en_US
dc.date.rdate2001-01-08
dc.date.adate2000-01-08en_US


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