Dissolved Air Flotation (DAF) System
Advanced Solid–Liquid Separation for Industrial Wastewater Treatment
Varsha Enviro Technologies is a trusted Dissolved Air Flotation (DAF) system manufacturer in India, delivering robust and high-performance DAF solutions for effective removal of suspended solids, oil, grease and colloidal contaminants from wastewater. Our DAF systems work as primary and secondary treatment units, improving effluent quality and reducing load on downstream biological and membrane treatment systems.
Why Industries Need Dissolved Air Flotation
Industries generating oily, greasy and high suspended solids wastewater often struggle to meet discharge norms using conventional clarification methods. Dissolved Air Flotation effectively separates low-density solids, fats, oils and emulsified contaminants. With stringent CPCB/SPCB norms across India, DAF systems help ensure regulatory compliance, reduce sludge volume and improve overall treatment efficiency.
DAF System Components
- Coagulation & Flocculation Unit: Chemical dosing, flash mixer and flocculator agglomerate fine particles and emulsified oil for efficient flotation.
- Air Dissolution Tank: Pressurized vessel dissolves air into clarified water to generate microbubbles.
- DAF Flotation Tank: Micro air bubbles attach to flocs and float them to the surface for separation.
- Skimmer Mechanism: Surface skimmers remove floating sludge while bottom scrapers handle settled solids.
- Sludge Handling System: Sludge is transferred to thickener or filter press for dewatering and safe disposal.
DAF Treatment Process Flow
- Coagulant and polymer dosing
- Floc formation in flocculation chamber
- Pressurized air dissolution
- Microbubble release and flotation
- Floating sludge removal
- Clarified water outlet for reuse or further treatment
Key Features of Our DAF Systems
- High removal efficiency for TSS, oil and grease
- Compact design with small footprint
- Low power and chemical consumption
- Heavy-duty MS & SS construction
- Fully automated PLC-based operation
- Easy maintenance & long service life
- Ideal pretreatment for RO & membrane systems
Applications
- Food & beverage processing industries
- Dairy & slaughterhouses
- Oil refineries & petrochemical units
- Chemical & pharmaceutical industries
- Textile & dyeing units
- Automobile & metal processing plants
- Municipal sewage & industrial ETPs
Benefits of Installing a DAF System
- Effective removal of oil, grease & suspended solids
- Improved downstream treatment performance
- Reduced sludge volume & disposal cost
- Compliance with pollution control board norms
- Enhanced water reuse capability
- Lower operational challenges
Why Choose Varsha Enviro for DAF Systems?
We design and manufacture customized Dissolved Air Flotation systems based on wastewater characteristics, flow rate and treatment objectives. Our DAF plants ensure stable performance, energy efficiency and long-term reliability. We offer turnkey execution, installation, commissioning, operator training and nationwide after-sales support.
FAQs
What is a Dissolved Air Flotation system?
DAF is a wastewater treatment process that uses micro air bubbles to float suspended solids and oil for removal.
Which industries require DAF systems?
Food processing, dairy, chemical, oil refineries, textile, pharma and municipal treatment plants.
Can DAF be used as RO pretreatment?
Yes, DAF significantly improves RO performance by removing oil and fine suspended solids.
What type of sludge is generated from DAF?
DAF generates floating sludge which is easy to dewater and dispose.
Is DAF suitable for oily wastewater?
Yes, DAF is one of the most effective technologies for oil- and grease-rich effluent.