This study presents a novel approach to sustainable aquaculture by integrating biofloc technology (BFT) with a compact down-flow hanging sponge (DHS) reactor. The integrated BFT-DHS system effectively removed nitrogen compounds while maintaining ammonia-nitrogen (NH-N) concentrations below 1 mg-N L without water exchange. Application of this system in a tank bred with juvenile Oreochromis niloticus showed a high NH-N removal rate of up to 97 % and nitrite (NO -N) concentrations were maintained at 0.
View Article and Find Full Text PDFIn recirculating aquaculture systems (RAS), maintaining water quality in aquaculture tanks is a paramount factor for effective fish production. A down-flow hanging sponge (DHS) reactor, a trickling filter system used for water treatment of RAS that employs sponges to retain biomass, has high nitrification activity. However, nitrification in seawater RAS requires a long start-up time owing to the high salinity stress.
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