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Nuisances rencontrées en élevages intensifs de microalgues recevant du lisier de porc
Dabbadie, L.; Cagnon, N. (1993). Nuisances rencontrées en élevages intensifs de microalgues recevant du lisier de porc, in: Barnabé, G. et al. (Ed.) Production, environment and quality: Proceedings of the International Conference Bordeaux Aquaculture '92, Bordeaux, France, March 25-27, 1992. EAS Special Publication, 18: pp. 51-62
In: Barnabé, G.; Kestemont, P. (Ed.) (1993). Production, environment and quality: Proceedings of the International Conference Bordeaux Aquaculture '92, Bordeaux, France, March 25-27, 1992. Special Publication European Aquaculture Society, 18. European Aquaculture Society: Gent. 587 pp., meer
In: Special Publication European Aquaculture Society. European Aquaculture Society: Bredene. ISSN 0774-0689, meer
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  • Dabbadie, L.
  • Cagnon, N.
Abstract
    Intensive microalgal cultures grown on pig manure were carried out in 700l tanks to improve simple technologies easily transferable in the field. Many nuisances appear in the algal "reactor". Phytoplankton production decreased during winter more in relation with low temperatures than by short photoperiod. It is necessary that cultures are not carried out in the neighbourhood of trees to limit problems due to leaves decay. Absence of mixing entailed algae floatation, mainly during spring, and also caused cell sedimentation which induced anoxic conditions. Culture mixing, even in an intermittent way, seems to be necessary. Rotifer proliferation (up to 10 000 ind.l-1) held responsible for the collapse of the algal population seems to be a consequence rather than a cause of this collapse. The main aim of the work carried out at the Museum is the preparation of experiments on a pilot plant.
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