Dissolved Air Floatation
Overview
A Dissolved Air Flotation (DAF) System is a highly efficient solid-liquid separation technology used for the removal of suspended solids, oil & grease, fats, biological sludge, color, and other low-density contaminants from industrial wastewater. The process works by dissolving air into water under pressure and releasing it at atmospheric pressure to generate microbubbles that attach to contaminants and float them to the surface for removal.
DAF systems are widely used in ETP, STP, Food Processing, Dairy, Chemical, Textile, and Industrial Wastewater Treatment Plants.
Treatment Process Flow
Equalization Tank → Chemical Dosing (Coagulant & Flocculant) → Flocculation Tank → DAF System → Clarified Water Tank → Further Treatment / Discharge
Working Principle
The DAF system recirculates a portion of treated water through a pressurized saturation vessel where air is dissolved. When released into the flotation tank, microscopic air bubbles are formed. These bubbles attach to suspended particles, oil droplets, and flocs, causing them to float to the surface. The floating sludge is continuously removed by a mechanical skimmer while clarified water exits from the bottom of the unit.
Technical Specifications
Parameter | Specification |
Capacity Range | 1 m³/hr to 500+ m³/hr |
Technology | Dissolved Air Flotation |
Operating Pressure | 4 – 6 kg/cm² |
Air Saturation System | Pressurized Recycle Water |
Operation | Continuous |
Sludge Removal | Mechanical Skimmer |
Automation | Manual / Semi-Automatic / PLC Based |
Main Components
Equipment | Function |
DAF Tank | Flotation and separation |
Air Saturation Vessel | Dissolution of air into water |
Recycle Pump | Pressurized water circulation |
Air Compressor | Air supply |
Chemical Dosing System | Coagulant and polymer dosing |
Flocculation Tank | Floc formation |
Surface Skimmer | Removal of floating sludge |
Sludge Hopper | Sludge collection |
Control Panel | System operation and monitoring |
Available MOC (Material of Construction)
Component | MOC Options |
DAF Tank | MS Epoxy Coated / SS304 / SS316 |
Air Saturation Vessel | MS / SS304 / SS316 |
Piping | UPVC / SS304 / SS316 |
Skimmer Mechanism | MS Painted / SS304 |
Sludge Hopper | MS / SS304 / SS316 |
Structural Frame | MS Painted / SS |
Performance
Parameter | Typical Removal Efficiency |
Suspended Solids (TSS) | Up to 90–98% |
Oil & Grease | Up to 95–99% |
BOD Reduction | Up to 40–70% |
COD Reduction | Up to 30–60% |
Color Reduction | Up to 60–90% |
Applications
- Dairy Industries
- Food & Beverage Industries
- Slaughterhouses & Meat Processing Plants
- Textile Industries
- Chemical Industries
- Pharmaceutical Industries
- Oil & Grease Removal Applications
- Electroplating Industries
- Paper & Pulp Industries
- Effluent Treatment Plants (ETP)
Features
- High Removal Efficiency
- Compact Design
- Continuous Operation
- Low Hydraulic Retention Time
- Efficient Oil & Grease Separation
- Automatic Sludge Removal
- Easy Installation & Maintenance
- Suitable for High Load Wastewater
Benefits
- Excellent Oil & Grease Removal
- High Suspended Solids Removal Efficiency
- Reduced Load on Biological Treatment Systems
- Compact Footprint Requirement
- Lower Chemical Consumption
- Improved Downstream Treatment Performance
- Reliable Continuous Operation
- Reduced Sludge Handling Cost
Typical Industries Served
- Dairy Processing Plants
- Food Processing Industries
- Textile Processing Units
- Chemical Manufacturing Plants
- Pharmaceutical Industries
- Slaughterhouses
- Oil Refineries
- Metal Finishing Industries
- Paper & Pulp Industries
Vikas Engineering Solution
- Scope of Supply
- Process Design & Engineering
- DAF Unit Manufacturing
- Air Saturation System
- Recycle Pump & Air Compressor
- Chemical Dosing System
- Mechanical Skimmer Assembly
- PLC-Based Automation
- Installation & Commissioning
- AMC & Technical Support
Why Choose Vikas Engineering?
- Customized DAF Design
- High Separation Efficiency
- Robust Industrial Construction
- Low Maintenance Operation
- Compact and Energy-Efficient Systems
- Turnkey ETP & Wastewater Solutions
- Reliable After-Sales Service
Available Capacity Range: 1 m³/hr to 500+ m³/hr
Suitable for Industrial, Commercial, Municipal, and Process Wastewater Treatment Applications.
Vikas Engineering manufactures high-performance Dissolved Air Flotation (DAF) Systems for efficient removal of suspended solids, oil & grease, fats, color, and floating contaminants, providing compact and reliable solutions for ETP, STP, and industrial wastewater treatment plants.