Coagulation Flocculation Treatment Mixers

Coagulation Flocculation Treatment Mixers – Wastewater has particulate matter which must be removed before further treatment and clarification can take place, these minute particles (colloids) are negatively charged and take a very long time to settle.  To decrease the time taken for these particles to settle from weeks or hours to a few minutes the coagulation process has to be applied early in the water treatment stage.

Coagulation Process

Coagulation Treatment Mixers – The objective of the coagulation process is to create microflocfrom particulate matter so that it can settle and move to the sedimentation process. To neutralize negatively charged particle, add a coagulant that is positively charged such as aluminium sulphate.  With the addition of this, within a few seconds, microparticles are created as negatively charge particles bond with the positive charge alum.  As further mixing continues they become bigger and form macro flocs that can settle to the bottom.

Flocculation Process

At this stage, another chemical can be added, a polymer, which helps keep the macro flocs together.  Essentially it helps make the bridge between the micro flocs stronger when forming the macroflocs.

A Flocculator

Has 2 or 3 stages with separate mixers. At each stage there are various sizes of flocs, as the size of the flocs increase, the power on the mixers is decreased, to prevent shear, and not damage the flocs.  Taking each flocculator stage, various impeller configurations are used.

1st Stage – Microflocs developing into Macroflocs

2nd Stage – Medium-sized Macroflocs

3rd Stage – Larger Macroflocs

The configuration of the mixers at various stages in the flocculator requires various individual combinations of impellers.  Enduramaxx has configured many wastewater Coagulation Flocculation Treatment Mixers with 3 stage treatment for such applications call us today on 01778 562810.

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