Dissolved Air Flotation (DAF) System
Yixing Feiran DAF systems provide highly efficient removal of suspended solids, oils, grease, and other light contaminants from industrial and municipal wastewater. Our DAF units use micro-bubble technology to achieve 90–98% removal rates for TSS, FOG, and colloidal particles.
Technical Specifications
| Parameter | YX-DAF-5 | YX-DAF-10 | YX-DAF-20 | YX-DAF-30 | YX-DAF-50 | YX-DAF-80 | YX-DAF-100 | YX-DAF-150 | YX-DAF-200 |
|---|---|---|---|---|---|---|---|---|---|
| Flow Rate (m³/h) | 5 | 10 | 20 | 30 | 50 | 80 | 100 | 150 | 200 |
| Surface Load (m³/m²·h) | 3-5 | 3-5 | 3-5 | 4-6 | 4-6 | 5-7 | 5-7 | 5-7 | 5-7 |
| DAF Tank LxWxH (m) | 2.5×1.2×1.2 | 3.5×1.5×1.3 | 4.5×2.0x1.5 | 5.5×2.5×1.6 | 7.0×3.0x1.8 | 8.5×3.5×2.0 | 9.5×4.0x2.0 | 11×4.5×2.2 | 13×5.0x2.5 |
| Dissolved Air Vessel (m³) | 0.3 | 0.5 | 1.0 | 1.5 | 2.0 | 3.0 | 4.0 | 5.0 | 6.0 |
| Recirculation Ratio (%) | 20-30 | 20-30 | 20-30 | 20-30 | 25-35 | 25-35 | 25-35 | 25-35 | 25-35 |
| Air Dissolution Pressure (MPa) | 0.3-0.5 | 0.3-0.5 | 0.3-0.5 | 0.3-0.5 | 0.3-0.5 | 0.3-0.5 | 0.3-0.5 | 0.3-0.5 | 0.3-0.5 |
| Recirculation Pump (kW) | 2.2 | 3.0 | 4.0 | 5.5 | 7.5 | 11 | 15 | 18.5 | 22 |
| Skimmer Motor (kW) | 0.37 | 0.37 | 0.55 | 0.75 | 0.75 | 1.1 | 1.1 | 1.5 | 1.5 |
| Compressor (kW) | 1.5 | 2.2 | 3.0 | 4.0 | 5.5 | 7.5 | 11 | 15 | 18.5 |
| Material | SUS304 | SUS304 | SUS304/316L | SUS304/316L | SUS304/316L | SUS304/316L | SUS304/316L | SUS304/316L | SUS304/316L |
| TSS Removal (%) | 90-98 (with proper chemical conditioning) | ||||||||
| FOG Removal (%) | 85-95 | ||||||||
Key Performance Features
- High removal efficiency – 90-98% TSS removal, 85-95% FOG removal
- Micro-bubble technology – 20-40um bubble diameter for maximum flotation
- Compact footprint – 50% smaller than conventional sedimentation
- Rapid treatment – hydraulic retention time only 15-30 minutes
- Low chemical consumption – optimized coagulant/flocculant dosing
- Automatic skimmer – continuous float removal, fully automated
- Stainless steel construction – SUS304 or 316L for corrosion resistance
Applications
- Municipal wastewater pretreatment
- Oily wastewater treatment (refinery, restaurant, workshop)
- Paper and pulp industry whitewater recovery
- Textile and dyeing wastewater color removal
- Food processing (meat, dairy, beverage)
- Chemical and pharmaceutical plant wastewater
- Seawater desalination pretreatment
- Stormwater treatment
Market-Specific Solutions
Saudi Arabia
- High-temperature operation design (up to 55C ambient)
- SUS316L construction for desalination plant integration
- SASO compliance certification available
- TSE (Treated Sewage Effluent) reuse standards compliance
Indonesia
- Tropical climate optimization (high humidity, heavy rainfall)
- Compact design for limited-space installations
- Municipal and palm oil mill wastewater treatment
Vietnam
- Cost-effective solutions for industrial zone deployment
- QCVN 40:2011/BTNMT compliance
- Textile and seafood processing applications
Why Choose Yixing Feiran DAF?
- 30-40% lower equipment cost compared to European brands
- Factory-direct pricing – no middleman markup
- 15+ years manufacturing experience
- English documentation – GA drawings, P&ID, operation manuals
- Remote commissioning support via video call
- 12-month warranty with spare parts within 48 hours
Frequently Asked Questions
What is the difference between DAF and sedimentation?
DAF uses micro-bubbles to float light particles to the surface, while sedimentation relies on gravity to sink heavy particles. DAF is far more effective for removing oils, grease, algae, and light suspended solids. It requires much less space and shorter retention time (15-30 min vs 2-4 hours).
What chemical conditioning is needed?
Typically a coagulant (PAC or ferric chloride) and a flocculant (PAM). Dosage: 50-200 mg/L coagulant + 1-3 mg/L flocculant for most industrial applications.
Can DAF handle high-TDS wastewater?
Yes. Our DAF systems operate effectively with TDS up to 50,000 mg/L. For seawater desalination pretreatment, we use SUS316L construction with special seal materials.
What is the typical power consumption?
0.05-0.15 kWh per m3 of treated water, depending on model size and recirculation ratio.
Do you provide installation and commissioning?
We provide detailed installation manuals, GA drawings, and P&ID diagrams. On-site or remote video-guided commissioning available. All documentation in English.
What is the delivery time?
Standard models: 30-45 days. Custom-engineered units: 45-60 days.
DAF System Technical Specifications
| Parameter | ZDAF-05 | ZDAF-10 | ZDAF-20 | ZDAF-30 | ZDAF-50 | ZDAF-100 | ZDAF-150 | ZDAF-200 |
|---|---|---|---|---|---|---|---|---|
| Treatment capacity (m³/h) | 5 | 10 | 20 | 30 | 50 | 100 | 150 | 200 |
| Surface area (m²) | 1.5 | 3 | 6 | 9 | 15 | 30 | 45 | 60 |
| Dimensions L×W×H (m) | 2.5×1.2×1.5 | 3.5×1.5×1.6 | 4.5×2.0×1.8 | 5.5×2.5×1.8 | 7.0×3.0×2.0 | 9.0×4.5×2.2 | 10.5×5.0×2.4 | 12.0×5.5×2.5 |
| Recycle ratio (%) | 10-30 | 10-30 | 10-30 | 10-30 | 10-30 | 15-40 | 15-40 | 20-50 |
| Saturation pressure (MPa) | 0.3-0.5 | 0.3-0.5 | 0.3-0.5 | 0.3-0.5 | 0.3-0.5 | 0.3-0.5 | 0.3-0.5 | 0.3-0.5 |
| Skimmer motor (kW) | 0.37 | 0.37 | 0.55 | 0.75 | 1.1 | 1.5 | 2.2 | 2.2 |
| Recycle pump (kW) | 2.2 | 3.0 | 5.5 | 7.5 | 11 | 22 | 30 | 37 |
| Air compressor (kW) | 1.5 | 2.2 | 3.0 | 4.0 | 5.5 | 11 | 15 | 18.5 |
| Total power (kW) | 4.07 | 5.57 | 9.05 | 12.25 | 17.6 | 34.5 | 47.2 | 57.7 |
| Tank material | SS304 / SS316L (optional) / Carbon steel + epoxy | |||||||
| TSS removal rate | 90-99% | |||||||
| FOG removal rate | 95-99% | |||||||
| COD removal rate | 60-80% (with coagulation) | |||||||
| Operating weight (kg) | 800 | 1,400 | 2,800 | 4,200 | 6,500 | 14,000 | 20,000 | 26,000 |
Verified Factory Specifications — All dimensions and weights are nominal. Contact engineering for project-specific sizing.
Regional Applications & Compliance
Saudi Arabia & GCC
- SWCC/NWC compliant — Suitable for pre-treatment before SWRO desalination plants
- Saudi Vision 2030 infrastructure projects — Municipal WWTP expansions in Riyadh, Jeddah, Dammam
- Industrial applications: Petrochemical effluent, refinery wastewater, food processing
- Climate-adapted design: Oversized saturation system for 45-50°C ambient operation
- Material specification: SS316L standard for high-TDS and high-temperature service
Indonesia
- Palm oil mill effluent (POME): DAF removes 95%+ FOG before biological treatment
- Textile & batik industry: Color and SS removal with coagulant-aided DAF
- Mining sector: Heavy metals removal from acid mine drainage
- PP 22/2021 compliance: Exceeds Indonesian discharge standards
Vietnam
- Seafood processing: FOG and solids removal from washing and processing wastewater
- Industrial zones: Pre-treatment for centralized WWTP in Binh Duong, Dong Nai
- QCVN 40:2011/BTNMT compliant — Meets Column A discharge standards
- Competitive pricing — Factory-direct with FOB Hai Phong / CIF Ho Chi Minh options
DAF System FAQ
Q: What’s the lead time for DAF equipment?
A: Standard models: 8-10 weeks. Custom/engineered units: 12-16 weeks. Containerized: 10-12 weeks.
Q: Can DAF handle high-salinity wastewater?
A: Yes. Our SS316L construction models are designed for TDS up to 50,000 mg/L, suitable for desalination pre-treatment and offshore applications.
Q: What’s the minimum flow rate for cost-effective DAF?
A: Our ZDAF-05 (5 m³/h) is the smallest standard model. For lower flows, consider our packaged DAF units starting from 2 m³/h.
Q: Do you provide installation supervision?
A: Yes. We provide commissioning engineers for on-site supervision. Remote commissioning support is also available via video link for experienced installation teams.