Patent ID: 7910001
Filing Date: 2011-03-22
Classification: A01K,C02F,Y10S

Abstract:
1. A method for reducing nitrate-nitrogen concentrations in a recirculating aquaculture system comprised of directing aqueous medium from one or more aquatic species rearing tanks through a novel arrangement of anaerobic denitrification reactors, wherein a) A portion of flow, ranging from 0.1-50% of aqueous medium from one or more aquatic species rearing tanks is directed through one or more anaerobic denitrification reactors; b) Aqueous medium treated in one or more denitrification reactors is directed towards a solids removing filter or mechanical filtration means; c) Untreated aqueous medium exiting aquatic species rearing tanks is combined with aqueous medium treated in denitrification reactors; d) Combined untreated aqueous medium and aqueous medium treated in denitrification reactors is directed towards aerobic nitrification; e) Aqueous medium processed through aerobic nitrification is further processed through degassing systems.