Water treatment in Recirculating Aquaculture Systems (RAS) by ultrasonically induced cavitation

The aquaculture sector will play an increasingly important role in the future in terms of food security, poverty reduction and economic development. However, the rapid development and dissemination of aquaculture has led to significant negative influences on the environment. Recirculating aquaculture systems (RAS) can be an ecologic sustainable alternative to common aquaculture systems due to an implemented water treatment system keeping emissions as low as possible. The aim of this study was to evaluate ultrasound as a new innovative physico-chemical water treatment process for the prevention of off-flavor, for the prophylactic reduction of germs and for the improvement of the efficiency of wastewater treatment in RAS. Experimental investigations in both fresh and marine water were carried out, taking biological, chemical, technical and economic aspects into consideration.


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