Overview

A dissolved air flotation unit separates suitable suspended solids and dispersed material by attaching fine air bubbles to particles. The resulting float layer is collected from the water surface for further handling.

System arrangement

The concept includes a flotation vessel, pressurised recycle section and surface collection mechanism. Where needed, upstream coagulation and flocculation help prepare the particles for separation. Operating checks cover recycle conditions and solids removal.

Typical applications

Flotation may be considered for compatible food processing, production wash water and other wastewater streams containing separable solids or fats. The incoming mixture determines whether chemical conditioning is appropriate.

Planning and service

Bench testing is useful for confirming chemical demand and separation behaviour. The design review should also address float sludge handling, equipment cleaning and the relationship between flotation and subsequent treatment stages.

Key features

• Fine bubble separation stage
• Surface solids collection
• Adjustable operating controls

Verdora demonstration concept. Illustrations are indicative; final equipment and performance require project-specific engineering.