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Design characteristics and production capacity of a closed recirculating fish culture system with continuous denitrification
Schmitz-Schlang; Moskwa, G. (1992). Design characteristics and production capacity of a closed recirculating fish culture system with continuous denitrification, in: Progress in aquaculture research: proceedings of the 4th German-Isreali Status Seminar held on October 30-31, 1990. Spec. Publ. Eur. Aquacult. Soc, 17: pp. 79-90
In: (1992). Progress in aquaculture research: proceedings of the 4th German-Isreali Status Seminar held on October 30-31, 1990. Spec. Publ. Eur. Aquacult. Soc, 17. European Aquaculture Society: Oostende. ISBN 90-71625-11-7. 360 pp., more
In: Spec. Publ. Eur. Aquacult. Soc, more

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Keyword
    Marine

Authors  Top 
  • Schmitz-Schlang
  • Moskwa, G.

Abstract
    A design of a closed recirculating fish culture system is described with a 98% recycle ration. An up-flow and a RDC filter are combined for biological water treatment. The up-flow filter is used for mineralization and nitrogen elimination and the RDC type filter for additional nitrification, before the water returns to the fish tanks stocked with trout. A pilot plant and a scaled up unit are compared. Calculated production capacity is 52.5 kg trout/m³ system water/year with a requirement of make-up water of 60 L/kg weight increase. In the pilot unit, differences in growth of trout compared to fish reared in a flow through system were of lesser importance. Nitrate nitrogen concentration can be stabilized in the range of 5-10 mg/L during a long term run of 18 months.

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