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The use of ozone in a high density recirculation system for rotifers Suantika, G.; Dhert, P.; Rombaut, G.; Vandenberghe, J.; De Wolf, T.; Sorgeloos, P. (2001). The use of ozone in a high density recirculation system for rotifers. Aquaculture 201(1-2): 35-49. dx.doi.org/10.1016/S0044-8486(01)00532-4 In: Aquaculture. Elsevier: Amsterdam; London; New York; Oxford; Tokyo. ISSN 0044-8486; e-ISSN 1873-5622

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Beschikbaar in	Auteurs
VLIZ: Open Marine Archive 278833 [ download pdf ]

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Trefwoorden

Aquaculture systems > Recirculating systems Aquaculture techniques Chemical elements > Nonmetals > Atmospheric gases > Oxygen > Dissolved gases > Dissolved oxygen Chemical reactions > Nitrification Control > Quality control > Water quality control Fluids > Gases > Atmospheric gases > Ozone Particulates > Suspended particulate matter Recirculation Bacteria [WoRMS]; Brachionus plicatilis Müller, 1786 [WoRMS]; Rotifera [WoRMS] Marien/Kust; Brak water; Zoet water

Author keywords

Brachionus plicatilis; recirculation; ozone; rotifers

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Auteurs		Top
Suantika, G. Dhert, P. Rombaut, G.	Vandenberghe, J. De Wolf, T. Sorgeloos, P.

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Abstract

The use of ozone in the effluent treatment of a closed recirculation system for rotifers resulted in a significant improvement of rotifer production and water quality. Compared to a control treatment, the rotifer culture exposed to ozone did not only support a higher rotifer biomass (16000 vs. 8000 rotifers ml-1), it also allowed a prolongation of the culture period for 4 days. Compared to a control treatment, the ammonium levels were reduced by 67%, nitrite levels by 85% and nitrate levels by 67%. The supplementation of ozone did not affect pH and dissolved oxygen levels. Besides the positive effect of ozone to the nitrification process, a better removal of suspended solids was noticed as well. This resulted in a decreased turbidity and a reduction of the number of particles in the culture water. The use of ozone also reduced the number of bacteria in the culture water. In general terms, it can be stated that supplementation of ozone in a closed recirculation system for rotifers considerably improves water quality, ensures stable and longer rotifer culture periods and controls bacterial proliferation.

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