The efficiency of rotating biological contactors in a closed recirculating fish culture system
2011
Jug-Dujaković, J., Technology and Business Innovation Center for Mariculture, Ston (Croatia) | Gavrilović, A., University of Dubrovnik, Dubrovnik (Croatia). Department of Aquaculture | Van Gorden, S., Fresh-Culture Systems, Inc., Breinigsville, PA (USA)
The aim of this study is to describe the performance of rotating biological contactors as an integral part of a commercial closed recirculating fish production system. This paper also provides a practical comparison of RBC design and performance considerations with other biofilter options. Rotating Biological Contactors have been demonstrated to be one of the most efficient and robust biofilters available for nitrification of aquaculture wastes. They demonstrate extremely high nitrification rates, while providing additional qualifications for self-aeration, off-gassing, and low-head operation. An ammonia removal rate of 1.2 g/square meter-day surpasses all other biofilter configurations cited. With a volumetric nitrification rate of 312 g/cubic meter-day, comparisons to fluidized sand filters demonstrate a nearly equal volumetric nitrification rate and significant superiority in energy efficiency, ease of management, and reliability. Considering this, in addition to the positive considerations that have always been attributed to this biofilter, the RBC provides a reliable and effective alternative for consideration in commercial recirculating aquaculture systems.
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