Submitted to: International Sustainable Marine Fish Culture Conference and Workshop Book of Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 9/15/2007
Publication Date: 10/15/2007
Citation: Pfeiffer, T.J. 2007. Overview of sustainable marine aquaculture systems engineering projects with emphasis on biofiltration [abstract]. International Sustainable Marine Fish Culture Conference and Workshop Book of Abstracts. p. 22.
Technical Abstract: The rate of ammonia removal for moving bed and static bed biofilters with plastic media was determined for various feed loading rates, flow rates, and salinity. Ammonia removal rates in the eight propeller-wash floating plastic bead filters (0.71 m3) utilized in the 45 m3 recirculating aquaculture systems ranged from 50 to over 1200 g TAN / m3 media – day, but rates dropped approximately 30% with increasing salinity. When enhanced filter media media was compared with the standard plastic bead media no difference in ammonia removal rates were observed in lightly loaded systems (approximately 0.2 kg feed/m3 media). Significant difference in the ammonia removal rates were observed once the feed load rates were above 0.4 kg feed/ m3 of media. The range of ammonia removal in the 0.71 m3 moving bead biofilters ranged from 20 to 250 g TAN/m3 media-day. In airlift moving bed torrus filters with kaldness™ media (0.37 m3) ammonia removal rates were under 300 g TAN / m3 media –day. No significant differences were observed with different media types (kaldness, enhanced, and standard bead media) were utilized in the filters.