70-80 m³/h Dissolved Air Flotation Unit for Sludge Treatment
The dissolved air flotation unit is a physical-chemical wastewater treatment system designed to separate suspended solids, oils, and grease from water. It operates by dissolving air under pressure and releasing microbubbles that attach to particles, causing them to float for removal by a surface skimmer. The system is widely used in industrial and municipal wastewater treatment plants, providing efficient clarification for high-load effluents, including oily wastewater and chemical process streams with stable separation performance.
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Product introduction of Dissolved Air Flotation Unit
The dissolved air flotation unit is a solid-liquid separation system used for wastewater clarification through microbubble flotation technology. It integrates coagulation, flocculation, air dissolution, and flotation separation in a single treatment process. Designed for continuous operation, it handles wastewater containing suspended solids, oils, and fine particles. The equipment is commonly constructed with corrosion-resistant materials and includes a recycle pressure system for air saturation. It is suitable for industries such as food processing, petrochemical, paper production, and municipal sewage treatment requiring stable effluent quality and reduced pollutant load.
Working Principle
The dissolved air flotation unit operates by dissolving air into a portion of clarified water under pressure. When released into the flotation tank, the pressure drop creates microbubbles. These bubbles attach to suspended particles, reducing their density and causing them to rise to the surface. A sludge layer forms and is removed by a skimming system, while clarified water exits from the bottom. The process combines chemical conditioning and physical flotation for efficient solid-liquid separation.
Product Parameter Table
| Capacity (m³/h) | 70-80 |
| Overall Dimensions L×B×H(mm) | 8000×3000×2400 |
| Flocculation reaction L/l(mm) | 1500 |
| Reflux pump (kW) | 11 |
| Air Compressor (kW) | 3 |
| Sediment Scraper (kW) | 0.4 |
| Flocculation reaction p+(kW) | 2.6 |
| Water Inlet DN1 | 250 |
| Water Outer DN2 | 250 |
| Exhaust Port DN3 | 80 |
| Sludge Discharge Outlet DN4 | 200 |
Main Features
- High-efficiency microbubble generation system improves particle flotation and separation performance significantly
- Integrated coagulation and flocculation process enhances removal of fine suspended solids and colloids
- Recycle pressurization system ensures stable dissolved air concentration for continuous flotation operation
- Effective oil and grease separation capability suitable for complex industrial wastewater streams
- Surface skimmer mechanism enables continuous sludge removal without interrupting system operation
- Corrosion-resistant construction materials ensure long service life under harsh wastewater conditions
Application Scenarios
- Municipal wastewater treatment plants for suspended solids and organic matter removal
- Food and beverage industries including dairy, slaughterhouse, and processing wastewater
- Petrochemical and refinery wastewater containing oil, grease, and chemical contaminants
- Paper and pulp industry effluent treatment with high fiber and solid content
- Textile, printing, and dyeing wastewater clarification and reuse systems
FAQ
1. What is the main function of a dissolved air flotation unit?
It removes suspended solids, oils, and grease by floating them using microbubbles.
2. Does the system require chemical dosing?
Yes, coagulants and flocculants are often used to improve particle aggregation efficiency.
3. Can it treat oily wastewater?
Yes, it is highly effective for oil-water separation in industrial applications.
4. How are solids removed from the system?
Floated sludge is collected by a surface skimmer continuously.
5. Is the process continuous or batch type?
It is designed for continuous wastewater treatment operation.
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