In connection with the use of RAS technology has the aquaculture industry experienced that seawater addition in a number of cases has resulted formation of toxic hydrogen sulfide (H2S) with subsequent acute, often total fish death. In the project, "Aquasulfate" one examines whether use of membrane filtration technology to reduce sulfate levels in the intake water (seawater intake) to a minimum can be a solution that both reduces the risk of H2S formation and at the same time ensuring good fish welfare. The theme is also illuminated in one post at the AqKva Conference.
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