Dissolved air flotation with high and efficiency

dissolved air flotation Plant HDF

Effective and efficient wastewater and process water treatment for industrial applications through flotation with micro bubbles
Process water is needed in many production processes as a solvent,for production of material,or for cleaning purposes.Water is recirculated and reused for economical and environmental reasons.Grease,oil,fat,floating and suspended solids,settling material,and dissolved components need to be separated to provide good and uniform water quality.
Recovery of valuable product from the water may be another additional objective.In addition,clogging and excessive wear of pipelines and other associated equipment is prevented,which increases the operating reliability of the production plant.
Where used process water is discharged as wastewater,pre-treatment is often required to prevent toxic or otherwise harmful substances from entering the sewer system and reduce thus surcharges and fees.Conventional gravity clarifiers are often incapable to achieve sufficient pre-treatment.Various types of flotation processes have been developed,whereof Dissolved Air Flotation with pressure water recirculation has proven most effective.
The Dissolved Air Flotation Plant provides a significantly improved flotation process with a special inlet structure that provides optimum control of the flow within the flotation tank.
The Dissolved Air Flotation Plants are successfully operated for a wide variety of industrial and municipal applications,such as:
Slaughterhouses
Meat processing and packing
Fish processing
Dairies
Convenience food production
Margarine production
Oil and fat refineries
Canneries
Industrial kitchens and canteens
Fast food providers
Soap works
Cosmetics industry
Textile industry
Chemical industry
Petrochemical industry
Iron and steel industry
Metal processing
Galvanizing,electroplating
Land remediation
Waste management
Municipal wastewater treatment

Chemicals dosing is optimal if the flotation system constantly achieves the required performance without overdosing of chemicals and unnecessarily increasing operating costs.In practice,it proves to be difficult to adjust the chemicals dose due to varying volumes and freights.
Large-dimensioned mixing and balancing tanks are beneficial but can frequently not be installed due to lack of space.Besides,the investments costs are high for the tanks and the accessory equipment required,such as circulation pumps and aeration systems for homogenisation.
The innovative Chemicals Dosing allows optimal dosing of the chemicals even with small mixing and balancing tanks.The specially developed system uses a combination of several measuring principles and constantly determines the optimal chemicals dose in real time.
Chemicals consumption,and therefore also operating costs,are reduced to a minimum.Additional positive effects can be seen in the volume of flotate Sludge generated.
The production of hydroxide sludge resulting from overdosing of precipitants is effectively avoided.The further utilisation and disposal of the flotate sludge generated is a main cost factor of flotation plants.Furthermore,it makes life easier for the operating staff as the system adjusts automatically to varying wastewater parameters without the need for any manual intervention.

BENEFITS

Advantages of the Dissolved Air Flotation Plant
Completely made of stainless steel(1.4571)
With optional chemical treatment stage-increased separation efficiency
Standardized sizes for different applications
Compact design,small footprint
Simple pressure release principle by means of a single valve for maximum operating reliability
Efficient,gentle mixing of the air bubbles into the wastewater flow
Defined tank flow due to the optimal design of the blending and feeder construction in the flotation tank
Large effective clarifier area due to the lamella separator,minimized risk of blocking due to suitably dimensioned gaps between the lamella plates
Generation of saturated pressure water with a multi-stage pump which is not subject to the pressure tank regulation
Experience from hundreds of installations in a variety of fields of application
Additional benefits of the system
Up to 30%reduction in chemicals consumption
Stable effluent values even for varying volumes and freights
Support and relief for operating staff
Up to 20%reduced disposal costs for flotate sludge
Integrated automatic cleaning of the measuring equipment used without additional fresh or warm water
Low investments costs and space requirements for mixing and balancing tanks
Return on investment within few months,proven with existing plants in operation
DETAILS

SYSTEM APPROACH
We provide complete systems for mechanical-physical water treatment by combining the HDF with other components:
Chemical pre-treatment by precipitation,neutralization and flocculation in a tube reactor to improve separation efficiencies,and even remove some dissolved pollutants
Mechanical pre-treatment with
Micro Strainer,or
Rotary Drum Fine Screen,or
Complete Plant
Treatment of the removed scum and sediment:
Sludge thickening with Rotary Screw Thickener and
sludge dewatering with Screw Press
Complete wastewater treatment:
Additional biological treatment with Membrane Bioreactor(->direct discharge).
Tertiary filtration
GRAPHIC RENDERING

Sewage Treatment Equipment

Rotary drumfilter