Water & Wastewater Treatment Agitators
Process Knowledge from Headworks to Sludge Dewatering
In a treatment plant, every basin has a different hydraulic requirement. A "one-size-fits-all" mixer wastes energy and compromises the process.
At G&G Ingenieros, we design specific mixing solutions for every stage of the water cycle, balancing necessary turbulence (G-Value) with energy efficiency for 24/7 operation in Municipal (WWTP/DWTP) and Industrial plants.
⚡ Stage 1: Flash Mixing (Coagulation)
Instant dispersion of chemicals (FeCl3, PAC, Alum). High energy dissipation (high G-Value) is required for a short retention time.
- Solution: Robust geared agitators equipped with specific **thin-profile propellers** designed to generate intense turbulence efficiently in large flow channels.
❄️ Stage 2: Flocculation
Gentle mixing to allow micro-flocs to grow into large, settleable particles. High shear must be avoided to prevent breaking the floc.
- Solution: Slow-speed geared agitators with large diameter, high-efficiency hydrofoil impellers to generate huge flow at very low RPM.
🦠 Stage 3: Biological Reactors (Anoxic)
Keeping activated sludge in suspension for denitrification without introducing oxygen (no surface vortex).
- Solution: Heavy-duty **vertical top-entry agitators** with deep-set impellers and strict speed control to ensure suspension across the entire basin depth.
💩 Stage 4: Sludge & Reagents
Homogenization of thickened sludge before dewatering, and preparation of Lime Milk or Polyelectrolyte.
- Solution: Robust geared units designed for high viscosity and abrasive media.
🛑 The #1 Problem: "Ragging" (Fouling)
Municipal wastewater is full of wipes and fibrous materials that clog standard propellers. We supply self-cleaning impeller profiles with swept-back leading edges designed to shed fibrous debris and prevent build-up, ensuring continuous operation in raw sewage pumping stations.
Selected Water Projects
🌊 Desalination Plant (SWRO)
Project: TKO Desalination Plant (Hong Kong).
Challenge: Flocculation in deep tanks requiring 6-meter shafts in highly corrosive seawater environment.
Solution: Super Duplex stainless steel construction with precision-machined pendular shafts.
♻️ Municipal WWTP Upgrade
Application: Anoxic Zone Mixing (Denitrification).
Challenge: Replacing inefficient submersible mixers to reduce energy bill while maintaining MLSS suspension.
Solution: Installation of high-efficiency vertical top-entry agitators with large hydrofoil impellers operating at ultra-low speed.
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