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Rules of thumb in aquaponics

Rules of thumb in aquaponics. pH Oxygen Fish Plants Biofilter System design. pH. Balancing acids in the system pH and ammonia Adding base KOH Ca(OH)2 1kg of fish feed to ~0,25 kg of base. Oxygen. Safe ratio 1:1 Deep aeration Move water not air Removing solids

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Rules of thumb in aquaponics

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  1. Rules of thumb in aquaponics pH Oxygen Fish Plants Biofilter System design

  2. pH • Balancing acids in the system • pH and ammonia • Adding base • KOH • Ca(OH)2 • 1kg of fish feed to ~0,25 kg of base

  3. Oxygen • Safe ratio 1:1 • Deep aeration • Move water not air • Removing solids • 25% of feed becomes TSS • Radial flow clarifier/swirl separator radial-flow settler 190 lpm/m2 • Settling basins, drum filters • Proper tank design

  4. Fish • Fish stocking • Final weight 10-20 kg/m3 • Feeding rates • Constat feed input • Staggered production • 20-30% harvest • Multiple fish size

  5. Plants • Daily feeding rate • 10-25 g/m2 • LAI – leaf area index • LAI = leaf area / ground area, m2 / m2 • LAI < 0.6 feed only 50% of daily feed • LAI > 1 feed 100% of daily feed • Visual evaluation • Coverage in %  % of daily fish feed

  6. Biofilter • Flood and drain system • No other filtration – 1:1 or 1:2 ratio • Solids removal • SSA(specific surface area) • kg TAN/day produced(0,3% of feed) • gTAN/m2/day removed

  7. System design • Keep it simple • One pump • Short pipelines • Oversized pipes

  8. Thank you for your attention Matej Leskovec

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