![]() PTAN can be estimated using either volumetric or The volume of static sand required to remove the.Example 1 Fluidized-bed biofilters with fine.Size biofilter to remove all of daily TAN.aTAN TAN production proportionality constantĪssume a Fully-Recirculating System (no water.At a Q of 61.7 m3/min, the culture tank volume ofĢ160 m3 would be exchanged on average every 35.Assume an average fish density across all culture.20,000 gal/min for 1 million lb (500 TON) annual.76,000 L/min for 454 MTON/yr production.50 lb/yr production in 1 gpm of water flow.traditional trout culture rule of thumb.Estimate water flow (Q) required to meet fish O2. ![]() Estimate the mass and volume of oxygen required.aDO average DO consumption proportionality.Estimate the oxygen demand of systems feeding.Estimate of systems average feeding biomass.(these rates are an average over entire year) Feed conversion rate FCR 1.3 kg feed/kg fish.Reduce variable costs per MTON produced.Large Production Systems are More Cost Effective There are few large water resources available for.Large Operations Dominate Commercial Trout Production Goal 1.0 million lb/yr (454 mton/yr). ![]() Biological EnvironmentalĮngineering Cornell University Ithaca, NY Title: Coldwater Biofilter Design Examples
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