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FRP Settling Tanks

FRP Settling Tanks (framed sedimentation or wash water tanks) provide primary or secondary clarification for effluents. These tanks allow solids to settle by gravity under quiescent conditions. The fiberglass material ensures “superior corrosion resistance” and longevity even with harsh influent. Sloped or flat bottoms can be specified, and outlets include overflow launder connections. In FRP settling tanks, suspended solids are given time to flocculate and fall out of suspension, resulting in clarified water above.

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Key Features

  • FRP Tank Body: Non-corrosive fiberglass tank liner with reinforcement. Typical design includes an FRP cone or flat floor and vertical walls.
  • Tailored Design: Customizable volume, shape (round, rectangular) and depth to meet required retention time and flow rates.
  • Inlet/Outlet Fittings: PVC or FRP pipe connections, feed distribution trenches, adjustable baffle plates.
  • Optional Accessories: Sludge hoppers, submerged launders or trippers, clean-out covers, and anti-vortex devices.

Benefits

  • Reliable Solids Separation: High-settling efficiency with adjustable overflow weir heights.
  • Minimal Maintenance: No corrosion means no peeling or rust deposits; easy to clean out settled solids.
  • Quick Installation: Prefabricated FRP sections bolt together on site, speeding up construction.

Applications

Oil/water separation, grit removal, primary sewage settlement, tertiary polishing basins, stormwater settling ponds, and sludge thickening clarifiers.


Technical Specifications

Tank diameters from ~1 m to 20 m+ and depths up to 5–7 m are standard. FRP wall panels are typically 6–12 mm thick with vertical FRP C-channel stiffeners. Compliance with local codes (e.g. AWWA D120) is available. Inlet weirs and outlet launders match design flow (often 1–5 m³/m·hr).


Unique Selling Points

We can include lamella packs inside large tanks for high-rate clarification, or dual-zone tanks for flocculation/settling. Our FRP settling tanks withstand shocks (e.g. acid spurts) far better than concrete.