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To remove suspended impurities and colloidal substances in water and sewage, the coagulation and flocculation method is used, which is the addition of the coagulant material, which leads to the neutralization of the charge of colloidal particles, and thus the particles are closer to each other And make coarser particles. The resulting clusters of suspended and colloidal particles are coarse enough to easily be deposited and flattened.
To complete this operation and to create larger clumps of materials called polyelectrolyte or polyacrylamide coagulants, they are sometimes referred to as PAM. Coagulants are highly water-soluble polymeric compounds based on polyacrylamide, soluble in water, widely used as coagulants, increasing the rate of solidification of suspended solids and colloids and coloring in the processes of filtration and production of liquids. To be The cation or anion bound to the chemical structure of the polyacrylamide determines the type of active polymer load. The molecular weight and intensity of the poly-electrolytes are very effective in their activity.
The help of coagulants, by creating a bridge between the fine-grained particles of the coagulants, brings them into large and heavy flocs, speeds up the deposition. It also expands the optimum pH range, reducing the amount of coagulant used.
Some uses of this category of materials are:
• Coagulant aid in the process of raw water distillation in the production of drinking water and industrial water
• Coagulation of suspended solids and colloids in the processes of sugar and liquid condensation
• Isolation of Solids and Organic Compounds in Refrigeration and Thermal Refrigeration
• Isolation of solids, oils and greases and insoluble oxides in the recycling of waste from the rolling mill in the steel industry
• Removing colors, suspended solids and colloids in the petrochemical industries
• Coagulant in industrial and sanitary waste water treatment systems
• Separate simultaneous separation of fat and oil particles and heavy particle separation in refineries and petrochemical industries (DAF technology)
• The agricultural sector is used to absorb water and increase the water absorption coefficient.
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