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Flocculant Dosing Systems

Flocculant Dosing Systems | Chema Engineers
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Flocculant Dosing System

Automatic Flocculation & Polymer Prep Plants

A flocculant dosing system is a device that mixes and delivers a flocculant solution to a water or wastewater treatment process. A flocculant is a chemical agent that causes suspended particles to clump together and form larger aggregates, called flocs, that can be easily separated from the liquid. Flocculation is an important step in many water and wastewater treatment processes, such as clarification, filtration, thickening and dewatering.

Working Principle of Dosing System

  • The flocculant solution is prepared by mixing a dry or liquid flocculant with water in a tank. The concentration and pH of the solution are adjusted according to the type and dosage of the flocculant.
  • A metering pump or a dosing pump transfers the flocculant solution from the tank to the injection point in the liquid stream. The flow rate and pressure of the pump are controlled by a controller or a feedback loop to ensure accurate and consistent dosing.
  • The flocculant solution is injected into the liquid stream through a nozzle or a static mixer. The injection point is selected based on the characteristics of the liquid stream, such as flow rate, turbulence, temperature, and pH.
  • The flocculant solution interacts with the suspended particles in the liquid stream, causing them to aggregate into larger flocs. The flocs settle faster than the individual particles, forming a sludge layer at the bottom of the tank or basin. The clarified liquid is then separated from the sludge and discharged or further treated.

Key Features of Chema Dosing Systems

Specification / Parameter Details & Capabilities
Efficient Flocculent DosingOur design features 3 mixing chambers which ensures even distribution of flocculent for the most efficient settlement of solids while optimising flocculent consumption for your material.
Deaeration ChamberAfter passing through the 3 mixing chambers the solution is delivered directly to your thickener via the deaeration chamber where it is mixed with the wastewater from your wet processing plant containing the minus 63 micron material.
Automatic Flocculent DosingAutomatic dosing of flocculent to the correct concentration is possible as a result of the extensive testing of your material prior to equipment specification. Our AutoFloc system allows for variations in your feed material to be easily accommodated and ensures consistent performance.

Benefits vs Manual Batching

  • 15-25% Less Flocculant: achieved due to 100% active polymer wetting and aging.
  • Stable Operation: No process upsets from concentration swings.
  • Labor Saving: Single shift checks vs continuous manual mixing.
  • Better Water Quality: Consistent overflow clarity below 50 NTU.
  • SCADA Ready: 4-20mA, Modbus for plant DCS integration.