DAF System Chemicals and Chemistry - Tissue

Coagulants are used to destabilize and help remove colloidal solids from water. They work by neutralizing the surface charges on solid particles, allowing them to stick together. Flocculants can then be added to further consolidate the particles and form larger flocs. In DAF systems, air bubbles are used to float suspended solids to the surface for removal. Chemical pretreatment improves the effectiveness of the DAF process by creating flocs that are easier to float. The removed solids can be collected for re-use, as is done in tissue machine white water systems, or disposed of, as is done in wastewater treatment plants.