DAF Flotation Unit

The DAF flotation unit consists of a flotation tank fitted with fine-bubble diffusers at the bottom and a foam collection system. The precision of the tank and the way bubbles are generated both determine flotation efficiency. The liquid inside the tank must remain in laminar, not turbulent, flow so that the flocs formed during the preceding coagulation stage are not broken apart. A well-designed and well-built flotation unit therefore delivers better process parameters, which reduces chemical consumption in the treatment process.

The unit also includes a tube flocculator, which precipitates contaminants from the wastewater chemically, using coagulants and flocculants, and corrects the pH. Its design gives the wastewater a long enough mixing time and the right conditions to form large agglomerates (flocs) that are easy to separate, without mechanical mixing. The flocculator carries, among other things, a flow meter, an automatic gate valve controlling the chemical flow, dosing ports for reagents and sensors supervising the process, while materials resistant to aggressive wastewater and chemicals give it durability.

The unit is also equipped with instrumentation, enabling integration with data transmission systems.

• Flotation tank with fine-bubble diffusers at the bottom
• Foam collection system
• Aeration and recirculation system
• Flotation sludge skimmer
• Treated liquid discharge system
• Tube flocculator included: coagulants, flocculants and pH correction
• Flow meter
• Automatic gate valve controlling the chemical flow
• Dosing ports for reagents
• Sensors supervising the process
• Materials resistant to aggressive wastewater and chemicals
• Instrumentation and integration with data transmission systems