Supplier Knowledge · Water Treatment Systems

Water Treatment Systems for Aquaculture — Buyer's Knowledge Page

Water treatment in commercial aquaculture spans three loops: intake conditioning, process water (culture loop), and effluent / sludge handling. Under-scoping any one loop can shut down operations and block export certification.

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Typical applications

  • Sea water intake conditioning (screening, coagulation, UV)
  • Fresh water conditioning (iron, manganese, hardness)
  • Process water in RAS (biofilter, degasser, oxygenator)
  • Effluent and sludge handling for permit compliance

Project sizes

  • Small pond farms: passive settlement + constructed wetlands
  • Mid intensive: mechanical filtration + biofilter
  • Mega RAS: multi-loop with denitrification, ozone, UV

Selection criteria

  • Removal efficiency for the actual influent (not a generic spec sheet)
  • Redundancy and CIP (clean-in-place) design
  • Chemical consumption and O&M cost transparency
  • Integration with SCADA and permit reporting

Questions buyers should ask

  • What is the guaranteed removal for TSS, TAN, NO₂, NO₃, BOD?
  • What is the peak vs average hydraulic load design?
  • How is the system commissioned and biology matured?
  • What is the annual chemical and consumable budget?

Common procurement mistakes

  • Sizing on average flow instead of peak flow
  • Ignoring seasonal source water variation
  • Missing sludge dewatering and disposal path

RFQ recommendations

  • Provide 12 months of source water analysis with the RFQ
  • Include effluent permit envelope in Employer's Requirements

Related tools & guides

Frequently asked questions

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