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ARS Home » Southeast Area » Stuttgart, Arkansas » Harry K. Dupree Stuttgart National Aquaculture Research Cntr » Research » Publications at this Location » Publication #199230
Title: DECENTRALIZATION OF RECIRCULATING MARINE HATCHERIES USING THE AIRLIFTED BEAD FILTERS AND MOVING BEAD BIOFILTER

Author
item Pfeiffer, Tim
item HANSON, K - LSU
item MALONE, R - LSU

Submitted to: International Conference on Recirculating Aquaculture
Publication Type: Proceedings
Publication Acceptance Date: 6/21/2006
Publication Date: 7/21/2006
Citation: Pfeiffer, T.J., Hanson, K.L., Malone, R.F. 2006. Decentralization of recirculating marine hatcheries using the airlifted bead filters and moving bead biofilter. 6th International Conference on Recirculating Aquaculture, July 21-23, 2006, Roanoke, Virginia. p. 111-120.

Interpretive Summary:

Technical Abstract: Marine hatcheries demand high water quality and must be designed in a biosecure manner. Failure to maintain a pristine disease free environment not only endangers the hatchery operations but can also seriously undermine large scale growout facilities that are dependent on healthy fingerlings. Given the aggressive natures of a variety of marine pathogens, biosecurity considerations should form a foundation for facility layout and system design. Circulating water to a centralized treatment train inherently increases the exposure of stock to any pathogen that may penetrate the facilities outer rings of protection. Decentralized recirculating strategies on the other hand provide an inherent line of protection by their hydraulic isolation. Economics will dictate that decentralized filtration systems be smaller, uncomplicated, and relatively easy to operate. Static, floating bead media filters can meet the core water treatment needs (solids capture and biofiltration) while the use of airlifts (aeration, carbon dioxide stripping, and circulation) allows the centralization of utilities while dramatically limiting the potential for cross contamination of waters from diverse tank systems. Moving bed bioreactors can be incorporated to provide supplemental biofiltration as an offset to exceptionally high loading or as a means to increase the oligotrophic nature of the waters. This paper presents the rationale underlying the use of decentralized modular treatment systems while providing interim sizing criteria for static floating bead media filters or moving bed bioreactors driven by airlifts .