Description
Dissolved air flotation Description
Dagyee DAF System proactively promotes solid/liquid separation providing better contaminant removal, more efficient chem usage and drier sludge – using a much smaller footprint than conventional DAFs.However, as opposed to DAF's that require significant retention time and rely on the old-school particle collision process to float solids, the DAF System injects air into 100% of the waste stream while pushing water through a series of hydrocyclones under controlled pressure, removing up to 100% of TSS & FOG. Chemicals are uncoiled in the Heads availing more than 2x the charge sites resulting in a higher rate of contaminant removal. Since separation occurs in the Heads, large tight flocs float and are skimmed off the tank into a sludge hopper. Drier sludge ensues as the air dissipates and chemicals recoil, to naturally dewater the flocs. Costs are reduced due to lower chemical, sludge handling and building costs.
Dissolved air flotation Feature
High removal rate
High sludge concentration
Good outlet water result
Significantly reduce the amount of polymer
Lower running consumption
Dissolved air flotation Available Options
Access platforms with ladder or stairs
Automatic sludge pump out packages
Chemical pretreatment systems
Concrete tank designs for large in ground installations
Duplex systems for redundancy
Effluent monitoring
Effluent sampling
Explosion-proof design
Flash mix/flocculation tanks with mixers
Full FRP or stainless steel construction
Influent equalization
Influent / effluent lift stations
Instrumentation and controls
Removable covers with gaskets
Integral mechanical sludge thickener
On board reagent storage (day tanks)
Pilot size units for on-site testing
Potable water design
Special coatings
Sludge handling and dewatering
Dissolved Air Flotation Applications
Enhance primary treatment performance without adding chemicals
Solids separation upstream of secondary processes such as:
Oxidation Ditches
Sequencing Batch Reactors
Biological Aerated Filters
Dissolved Air Flotation -Moving Bed Bio Reactors -Membrane Bio Reactors Primary treatment for new plants Grit removal after a coarse screen
Increase primary or secondary process capacity
Plant expansion where land is expensive or unavailable
Dig-free, concrete-free solution for mountainous or earthquake-prone areas
Combined sewer overflow (CSO) treatment
Stormwater treatment
