Today’s requirements for decreased water consumption ask for improved water management at mills. Our solutions and significant experience from the pulp and paper industry respond to that challenge.

Microflotation is a well-known method of particle separation. It is also called dissolved air flotation, DAF. It has long been used in the pulp and paper industry for different applications such as separation of ash, fines, resin and other detrimental substances from the process, recycling water and/or fiber and in all stages of process and effluent water treatment.

In microflotation micro-size bubbles are created by dissolving air into water under pressure. When the air saturated pressurized water is released, microbubbles are formed. Suspended solids and colloids attach to air bubbles and one another due to chemical, physical and electrical forces. These particle flocks then float to the water surface and are scraped off. Coagulation and/or flocculation chemicals can be used to improve the separation.

EWT’s advanced microflotation technology is called FlooDaf™ Microflotation. Its main features are rectangular shape, automatic dispersion water and basin level control. As a result of these FlooDaf™ Microflotation can have high hydraulic loading and a small footprint still maintaining good separation efficiency with discharge of sludge at high dry solids also at varying conditions.