Effects of solids removal on water quality and channel catfish production in a biofloc technology production system |
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| Authors: | Bartholomew W Green Kevin K Schrader Matthew McEntire |
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| Institution: | 1. United States Department of Agriculture (USDA), Agricultural Research Service (ARS)—Harry K. Dupree Stuttgart National Aquaculture Research Center, Stuttgart, Arkansas, USA;2. United States Department of Agriculture, Agricultural Research Service, Natural Products Utilization Research Unit, National Center for Natural Products Research, University, Mississippi, USA |
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| Abstract: | Total suspended solids control was evaluated in a channel catfish (Ictalurus punctatus) biofloc technology production system. Settling chamber flow rates were 0.9 (LO) or 2.9 (HI) L/min to reduce total suspended solids to 300 mg/L; solids were not removed from control tanks. Channel catfish yields (7.6–8.7 kg/m3) were not affected significantly, but control fish were skewed toward smaller size classes. Control treatment channel catfish tolerated 1,410 mg/L total suspended solids without adverse effects. LO- and HI-treatment fillet geosmin concentrations were high enough to be designated as off-flavor. Water quality results suggested that nitrification was affected by solids removal. |
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| Keywords: | Biofloc technology channel catfish total suspended solids geosmin MIB |
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