The Israeli Journal of Aquaculture - Bamidgeh 55(2), 2003, 79-85

CARBON DIOXIDE REMOVAL RATE BY AERATION DEVICES
IN MARINE FISH TANKS


Micha Eshchar*, Noam Mozes and Michael Fediuk

Israel Oceanographic and Limnological Research Ltd., National Center for Mariculture, P.O.Box 1212, Eilat 88112, Israel

(Received 18.11.02, Accepted 16.3.03)

Key words: aeration, carbon dioxide removal, KLa, sea bream intensive culture

Abstract

A procedure for measuring the transfer coefficient KLa for the removal rate of carbon dioxide by aeration devices in fish tanks was developed in the National Center for Mariculture in Eilat, Israel. The KLa for a paddlewheel and a submerged aerator were calculated, following experiments in which the aeration devices were used simultaneously for both carbon dioxide stripping and oxygenation. The paddlewheel was more efficient,with a transfer rate up to 1,200 g CO2 per hour and a stripping efficiency of 1.2 kg CO2 per kWh. In intensive sea bream culture, the calculated maximum feed load that a single paddlewheel aerator can support is 43.6 kg feed per day with an energy requirement of about 1.0 kWh per kg fish produced.


*Corresponding author: Tel.: +972-8-6361430, Fax: +972-8-6375761,
e-mail: meschar@ocean.org.il

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