Changes in some water quality conditions in recycling water using three types of biofiltration systems during the production of the sharptooth catfish Clarias gariepinus (Burchell): Part I: Relative efficiency in the breakdown of nitrogenous wastes by the different biofiltration units

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dc.contributor.authorPrinsloo J.F.
dc.contributor.authorRoets W.
dc.contributor.authorTheron J.
dc.contributor.authorHoffman L.C.
dc.contributor.authorSchoonbee H.J.
dc.date.accessioned2011-05-15T15:58:13Z
dc.date.available2011-05-15T15:58:13Z
dc.date.issued1999
dc.description.abstractA comparison is made of the relative efficiencies in the breakdown of nitrogenous wastes of three types of water recirculation biofiltration units used during the production of the sharptooth catfish Clarias gariepinus (Burchell). Two types of trickling filters were employed. One contained PVC shavings with a calculated surface contact area of 1 220 m2. The second is a more sophisticated biofilter unit made up with Siporax porous sintered glass cylinders with a total surface water contact area of 32 000 m2. The third filter consisted of a rotating biological contactor unit with a water contact surface area of 271.2 m2. Investigations showed that the PVC shavings filter unit was clearly the most efficient of the three by transforming more than 96% of the NH3-N into NO3-N. This was followed by the rotating biological contactor with a 93% efficiency and lastly by the Siporax filter with an almost 93% efficiency. The outcome of the section on the production of Clarias gariepinus follows in Part 2 of this series.
dc.description.versionArticle
dc.identifier.citationWater SA
dc.identifier.citation25
dc.identifier.citation2
dc.identifier.issn3784738
dc.identifier.urihttp://hdl.handle.net/10019.1/10834
dc.subjectaquaculture
dc.subjectbiofiltration
dc.subjectClarias gariepinus
dc.subjectfiltration
dc.subjectwastewater
dc.subjectwater quality
dc.titleChanges in some water quality conditions in recycling water using three types of biofiltration systems during the production of the sharptooth catfish Clarias gariepinus (Burchell): Part I: Relative efficiency in the breakdown of nitrogenous wastes by the different biofiltration units
dc.typeArticle
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