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Full-Text Articles in Animal Sciences
Tb179: Oxygen Supplementation For Aquaculture Biofilters, John Riley, Daniel Hagopian
Tb179: Oxygen Supplementation For Aquaculture Biofilters, John Riley, Daniel Hagopian
Technical Bulletins
There is conflicting evidence concerning the negative effects of high concentrations of dissolved oxygen on nitrifying bacteria. This project was developed to determine what happens to an established slime layer in a fixed-film, flow-through bio-filter, exposed to oxygen supersaturation. Specific objectives were to determine qualitatively and quantitatively whether the treatment is actually beneficial after acclimation, and whether rapid fluctuations in DO are detrimental to an acclimated culture.
Tb177: Evaluation Of An Experimental Filter Medium For Water Re-Use Systems, John Riley, David Cole, Robert Bayer
Tb177: Evaluation Of An Experimental Filter Medium For Water Re-Use Systems, John Riley, David Cole, Robert Bayer
Technical Bulletins
This report describes the development and testing of a new material for use as a filter medium in recirculating aquaculture systems and other water quality control situations. The material consists of a combination of activated carbon and a hydrophilic urethane foam in a homogeneous matrix. Its physical properties relevant to filtration were determined. It was then tested for its ability to remove various dissolved organic compounds and inorganic nitrogenous compounds in the form of a synthetic waste-water containing ammonia and nitrite. Finally it was subjected to long-term use in the biofilter of a fish culture system. It proved to be …