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Fixed film nitrification characteristics in sea water recirculating fish culture systems
Nijhof, M.; Bovendeur, J. (1990). Fixed film nitrification characteristics in sea water recirculating fish culture systems. Aquaculture 87(2): 133-143
In: Aquaculture. Elsevier: Amsterdam; London; New York; Oxford; Tokyo. ISSN 0044-8486, more
Peer reviewed article  

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Keywords
    Aquaculture techniques; Biofilters; Culture tanks; Fish culture; Marine aquaculture; Nitrification; Pisces [WoRMS]; Marine

Authors  Top 
  • Nijhof, M.
  • Bovendeur, J.

Abstract
    Biofilm nitrification characteristics in sea-water recirculation systems were measured and compared to those in fresh-water systems. As in fresh-water systems, biofilm kinetics could be described accurately by the 1/2-order / 0-order kinetic model. However, sea-water systems need a much longer start-up period in which nitrite accumulates. Thereby, the maximum nitrification capacity is considerably lower than in fresh-water systems; at 24°C a maximum 0-order ammonia removal rate of 0.28 g m−2 d−1 NH4-N is observed, versus 0.69 g m−2 d−1 NH4-N in comparable fresh-water systems. Adaptation of a fresh-water biofilter to higher salinities was found to be possible, providing an effective tool for a shorter start-up period of a sea-water system. Nitrification rates were obtained which allow a rational design of intensive recirculating sea-water fish culture systems.

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