MIXERS

In wastewater treatment plants, mixers are mechanical equipment used to ensure homogeneous distribution of substances in wastewater, prevent sedimentation, or accelerate chemical reactions. Different types of mixers are used for different processes and are generally an integral part of the system to optimize physical, chemical, or biological processes.

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Purposes of Using Mixers

  1. Ensure complete mixing of chemicals
  2. Prevent sedimentation or sludge formation
  3. Support homogeneous distribution of oxygen in biological treatment tanks
  4. Ensure nutrients are evenly accessible to microorganisms
  5. Manage processes that require slow or rapid mixing

Main Types of Mixers
Slow Mixer

  • Low-speed, slow-moving mixers
  • Used in flocculation basins
  • Purpose: To form flocs ready for sedimentation by aggregating small particles
    Flash Mixer
  • High-speed, ensures complete dispersion of chemicals in a short time
  • Used in the coagulation unit
  • Purpose: Rapid mixing of chemicals into water to initiate coagulation
    Static Mixer
  • Mixers with no moving parts, placed inside a pipeline
  • Mixing occurs using the fluid’s own energy
  • Used after chemical dosing
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