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- +61 490 843 030
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Dissolved Air clarifier (DAF)
Wock-Oliver's DAF, Dissolved air floatation clarifier has been widely used for industrial wastewater treatment. The typical industrial wastes treated by flotation are paper mill backwater, oily wastewater as well effluents from sugar, dairy, textile industries and tanneries. Dissolved air flotation clarifiers or dissolved air flotation units (with 3 - 5 minutes of detention time) can replace sedimentation (with 2 - 3 hours of detention time) for clarification, has been overlooked by environmental engineers for many decades. Modern high rate DAF clarifiers have advanced to such an extent that they could overshadow conventional settling clarifiers in wastewater treatment. DAF hydraulic loading has increased from 1 L/m2.s to 2.5 L/m2.s and for a triple stacked unit to 7.5 L/m2.s. The detention time has decreased from 30 minutes to 3 minutes. Air dissolving is improved and now requires only 10 seconds retention time in the air mixing tube instead of the previous 60 seconds. The smaller size and weight of a modern DAF unit allow for inexpensive construction and flexibility of erection using prefabricated units. The availability of excellent flocculating chemicals gives a high stability of operation and high clarification degree.
DAF Systems
There are two main types of DAF which Wock-Oliver offers:
DEK Float
DEK Float is a durable and mechanically simple Dissolved Air Floatation (DAF) clarifier. This system simultaneously separates and removes both floatable and settable solids from water resulting in high clarity. DEK Float is unique as it combines the conventional clarifier technology with flotation system to produce a highly efficient clarifier system. It works by blending air with the raw water and causing the air to act as a carrier as the air bubbles carry flocculated solids to the top of the water, while the particles with more mass settle to the bottom. The sophisticated design employs both sedimentation and flotation in one singular system increasing the performance drastically.
Turbo Float
Turbo Float works by dissolving air into the wastewater. This creates thousands of micro-bubbles, and aerates the wastewater. This process floats and thickens the suspended material in the wastewater. The solids are then segregated for recovery or disposal. Unlike DEK Float, Turbo Float does not combine the conventional clarifier with floatation. It purely utilises the DAF technology whereas as DEK Float is a combination of DAF clarifiers and conventional clarifiers.
DAF ADVANTAGES
- Low capital and operational costs
- Totally integrated
- Pre-engineered
- Space saving and low foundation costs
- Simple installation
- High chemical efficiency
- Continuously self-cleaning
- Minimal maintenance
- Stable operation
- High quality clarified water
- Superior performance
- Easily relocatable
INDICATIVE LIST OF OUR DAF
- Fibre Recovery in Pulp and Paper Mills
- Solids Recovery
- Municipalities
- Tanneries
- Sludge Thickening
- Dairies
- Breweries
- Algae Removal
- Poultry Processing
- Refineries
- Pharmaceuticals
- Membrane System Pre-treatment
- Ballast Water
- Fish Processing
- Meat Processing and Packing
- General Food Manufacturing
- Snack Food Production
- Rendering Plants
- Canning Water
- Bakeries
- Confectionery
- Potato Processing
- Slaughter Houses
- Paint Shops
- Carbon Black Production
- Soap Industry
- Secondary Clarification
- Vegetable Oil Processing
- Laundries
- Water Recycling
- Car Wash Operations
- Textile Effluent
- Starch Removal
- Heavy Metals Removal
- Jute Mill Effluents