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Practical basis of nitrification in aquaculture waste-water
Poquillon, P.; Petit, J. (1989). Practical basis of nitrification in aquaculture waste-water, in: De Pauw, N. et al. (Ed.) Aquaculture: a biotechnology in progress: volume 1. pp. 1115-1123
In: De Pauw, N. et al. (1989). Aquaculture: a biotechnology in progress: volume 1. European Aquaculture Society: Bredene. ISBN 90-71625-03-6. 1-592 pp., more
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Document type: Conference paper
Keyword
    Marine/Coastal
Authors  Top 
  • Poquillon, P.
  • Petit, J.
Abstract
    Nitrification is an important process in the chain of water treatment procedures required to operate a recycling unit for fish culture. Experiments were performed with reconstituted fish breeding effluent on an experimental submerged fixed-bed reactor under pressure. The filter medium consisted of a calcinid clay (Biogrog, 1.2-1.5mm) with a specific surface area (106m².m-3). The treatment efficiency reached 9.6kgN-NH4.m-3.d-1 at 20°C and 4.9kgN-NH4.m-3.d-1 at 13°C for hydraulic load of 644m³.m-2.d-1. Reduction of the ammonia amount ceased when the dissolved oxygen concentration was equal or inferior to 3mg02.l-1. The nitrification's natural starting up phase lasted 42 days. This process could be reduced to 24 days by injection of commercial lyophilized bacteria into the filter.
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