Industrial Wastewater Recycling Solution with DAF System
The DAF system is a high-efficiency dissolved air flotation wastewater treatment solution designed for removing oil, grease, and fine suspended solids. It uses micro-bubble technology to attach particles and lift them to the surface for rapid separation. With up to 90% removal efficiency, the system ensures stable performance, compact design, and easy operation. It is widely used in industrial wastewater treatment, providing reliable clarification and improved water quality for discharge or reuse applications.
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DAF System Product Introduction
The DAF system (Dissolved Air Flotation system) is an advanced solid-liquid separation technology designed for wastewater treatment applications with high oil content, fine suspended solids, and low-density impurities.
By generating micro air bubbles through a dissolved air release process, the system attaches bubbles to suspended particles and oils, lifting them to the surface for efficient separation and removal.
It is widely used in industrial wastewater treatment systems requiring high-efficiency clarification and stable operation.
System Structure
The DAF system consists of:
- Dissolved air tank system
- High-efficiency release device
- Flotation separation tank
- Sludge scraping system
- Air compressor unit (low noise)
- Stainless steel / carbon steel tank body (SS304 optional)
- Automatic control system
Modular integrated design ensures compact installation and easy maintenance.
Working principle
1. Dissolved Air Generation
Air is dissolved into water under pressure using a high-efficiency dissolved air system.
2. Micro Bubble Release
Sudden pressure release creates micro bubbles (15–20 microns) in wastewater.
3. Attachment Process
Bubbles attach to oil, grease, and suspended solids in wastewater.
4. Flotation Separation
Combined particles rise to the surface due to reduced density (<1).
5. Sludge Removal
Surface sludge is removed by automatic scraping system.
Result: Efficient solid-liquid separation with up to 90% oil & TSS removal.
Product Parameter Table
| Capacity | 100 m³/h |
| Tank Dimension | 11.7×2.2×2.5 m |
| Circulating Pump Power | 15 kW |
| Air Compressor Power | 2.2 kW |
| Scraper Power | 0.4 kW |
| Material | Stainless steel (SS304 / carbon steel optional) |
| Removal Efficiency | Up to 90% oil & TSS |
| Bubble Size | 15–20 microns |
| Dissolved Air Efficiency | 80–90% |
| Dissolved Air Stability | >5 minutes |
DAF System vs Conventional Clarifier
| Feature | DAF System | Conventional Clarifier |
|---|---|---|
| Oil Removal Efficiency | Up to 90% | 40–60% |
| Separation Method | Micro bubble flotation | Gravity settling |
| Footprint | Compact | Large |
| Operation Speed | Fast | Slow |
| Automation Level | High | Low |
| Performance Stability | High | Medium |
Conclusion: DAF system significantly improves separation efficiency and industrial wastewater treatment performance.
Main Features
1.High Efficiency Flotation Technology
Removes up to 90% oil, grease, and suspended solids (TSS).
2.High Dissolved Air Efficiency (80–90%)
Optimized gas-water ratio improves flotation stability.
3.Micro Bubble Generation (15–20 μm)
Ensures strong attachment to fine particles and oils.
4.Stable Long Dissolved Air Retention
Maintains flotation performance for over 5 minutes stability time.
5.Automatic Operation System
One-button start/stop control for simplified operation.
6.Low Noise Industrial Design
Low-noise air compressor improves working environment.
7.Stainless Steel Anti-Corrosion Structure
Constructed with SS304 stainless steel or carbon steel coating.
8.Modular Integrated Design
Compact footprint reduces installation space and transportation cost.
Application Scenarios
Industrial Oil Wastewater Treatment
For high oil & grease wastewater → improves flotation separation → achieves 90% oil removal efficiency
Food Processing Wastewater
For high organic grease content → enhances solid-liquid separation → produces stable discharge water
Petrochemical Wastewater
For complex oily effluent → removes emulsified oil → reduces environmental discharge risk
Municipal Wastewater Plants
For mixed suspended solids → improves clarification efficiency → stabilizes effluent quality
Paper & Pulp Industry
For fiber-rich wastewater → enhances particle flotation → improves recycling performance
Why Choose DAF System
The DAF system provides a high-efficiency alternative to conventional sedimentation tanks by using micro-bubble flotation technology instead of gravity settling.
Compared to traditional clarification systems, it offers:
- Higher oil & TSS removal efficiency
- Smaller footprint design
- Faster separation speed
- Higher automation level
- Lower maintenance cost
FAQ
1. What is a DAF system in wastewater treatment?
It is a dissolved air flotation system that removes oil, grease, and suspended solids using micro bubble separation technology.
2. How does dissolved air flotation work?
It generates micro bubbles that attach to particles and float them to the surface for removal.
3. What is the efficiency of DAF system?
It can remove up to 90% of oil, grease, and suspended solids.
4. What industries use DAF systems?
It is widely used in food, petrochemical, municipal, and paper industries.
5. What is the difference between DAF and sedimentation?
DAF uses flotation technology, while sedimentation relies on gravity settling.
6. What is the bubble size in DAF system?
The system produces micro bubbles of 15–20 microns for efficient separation.
Contact us to get your quotation now.
Get in touch with our engineering team.
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