Coagulants: Solids are removed by sedimentation (settling) followed by filtration. Small particles are not removed efficiently by sedimentation because they settle too slowly; they may also pass through filters. They would be easier to remove if they clumped together (coagulated) to form larger particles, but they don’t because they have a negative charge and repel each other (like two north poles of a magnet).
In coagulation, we add a chemical such as alum which produces positive charges to neutralize the negative charges on the particles. Then the particles can stick together, forming larger particles which are more easily removed.
The coagulation process involves the addition of the chemical (e.g. alum) and then a rapid mixing to dissolve the chemical and distribute it evenly throughout the water.
Tramfloc, Inc. can also manufacture custom coagulant tablets and logs for your application needs. Please visit our page with our Material Safety Data Sheets for more specific information about our individual formulations.
Please enjoy these links, if you can’t find what you’re looking for, please let us know!
Coagulants: Polymers for Coagulation, Flocculation and Dewatering
Coagulants: Polymer Selection, Jar Testing Procedures
Coagulants: Precipitation and Dewatering
Coagulants: More Than You Ever Wanted to Know About Polymers
Coagulants: Polymer Feeders
Coagulants: Drilling Fluids
Coagulants: Coagulation and Bridger Approach
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