Dissolved Air Flotation (DAF)
The dissolved air flotation can perform several tasks: it reduces particular matter and suspended solids in the effluent, it reduces / removes toxic substances and/or fat.
The reduction of solids ensures that the biological stage can operate stably. Additionally, treatment costs are reduced because a removal of solids results in a reduction of COD. The removal of toxic substances protects the biomass from poisoning; the reduction of fat may be necessary to protect biomass from floating and the Ultrafiltration from clogging.