Dissolved Air Flotation System For Wastewater Pretreatment
Oil, suspended solids, colloids and light flocs often need separation before biological treatment or polishing. Wastewater source, flow rate, dosing needs, site layout and material requirements determine whether GW, YW or QDPP dissolved air flotation fits the pretreatment route.
1-200 m3/h YW Range
25-40 Micron Microbubbles
PP Vertical-Flow Option
GW
YW
QDPP
20+ Years
40,000 m2
ISO 9001 / 14001 / 45001
Custom Scope
DAF Systems For Oils, Suspended Solids And Light Flocs
DAF is normally reviewed when wastewater contains materials that can attach to fine bubbles and rise to the surface after chemical conditioning. It is not a replacement for every biological or advanced treatment stage.
Separate Floatable Pollutants
Protect Downstream Treatment
Review Dosing And Sludge
Choose Between GW, YW And QDPP DAF Configurations
Different DAF equipment forms serve different flow, footprint, component and material requirements. Final selection should start from water data, site layout and the downstream route.
GW-Type Flotation Machine
GW flotation uses in-pump pressurized gas-liquid mixing and fine microbubbles of 25-40 microns. It can be reviewed for municipal, papermaking, chemical, beverage, textile, refining, electroplating, food, slaughtering and leather wastewater pretreatment.
Compare GW Features
YW-Type Flotation Machine
YW DAF covers YW-3 to YW-200 with a reference treatment capacity range from 1 to 200 m3/h. It is the main model range for early flow matching, power comparison and equipment footprint review.
Review YW Specifications
QDPP Vertical-Flow DAF
QDPP DAF uses a PP vertical-flow structure for compact sites and corrosion-sensitive conditions. Numeric sizing is confirmed through project review before final specification and equipment drawings.
Evaluate PP DAF FitWhere DAF Fits In The Treatment Route
DAF works as a physicochemical separation stage. Screening, equalization and dosing conditions shape the flotation result, while downstream biological treatment, filtration, oxidation or reuse review decides the complete system route.
Selection Matrix For Early DAF Review
Water quality, solids behavior, oil content, chemical response, flow rate and site layout should be reviewed together before a DAF model is selected.
| Wastewater Condition | DAF Review Focus | Equipment Direction | RFQ Inputs |
|---|---|---|---|
| Oils And GreaseFood, slaughtering, cooking oil, refining or similar wastewater. | Oil separation, scum load, chemical conditioning and sludge handling. | GW or YW DAF with dosing and skimming review. | Oil content, COD, SS, temperature, pH, flow rate and discharge target. |
| Light Flocs And ColloidsFine particles after coagulation or flocculation. | Bubble attachment, floc strength, surface loading and retention time. | YW DAF capacity matching with dosing and flocculation conditions. | Jar-test notes, suspended solids, chemical type and hourly peak flow. |
| Hard-Settling MaterialsParticles that do not separate efficiently by gravity. | Flotation suitability before sedimentation, filtration or biological treatment. | DAF with screening, equalization and downstream solids control. | Particle profile, TSS, operating hours and downstream equipment target. |
| Compact Or Corrosive SiteLimited footprint or higher material-resistance needs. | Material selection, vertical layout, maintenance access and installation boundary. | QDPP PP vertical-flow DAF where the project conditions support it. | Site drawing, wastewater pH, salinity, chemicals, footprint and material preference. |
DAF Equipment Reference Data And YW Model Range
GW, YW and QDPP DAF lines provide different types of selection data. GW is reviewed by gas-liquid mixing structure and bubble characteristics, YW provides the clearest model capacity range, and QDPP DAF is reviewed by PP material, vertical-flow structure and compact-site fit.
| DAF Line | Available Reference Data | Selection Role | Project Review Focus |
|---|---|---|---|
| GW-Type Flotation Machine | In-pump pressurized gas-liquid mixing and 25-40 micron microbubbles. | Reviewed for oil-water separation, suspended solids, coagulated flocs and compact pretreatment routes. | Flow rate, scum load, dosing condition, tank layout, skimmer access and downstream route. |
| YW-Type Flotation Machine | YW-3 to YW-200 model range with 1-200 m3/h reference treatment capacity. | Main DAF line for early capacity, power, dissolved gas water volume and footprint comparison. | Average flow, peak flow, operating hours, solids load, oil load, dosing scope and site boundary. |
| QDPP Vertical-Flow DAF | PP material, vertical-flow structure, compact footprint and corrosion-resistance fit. | Reviewed for limited-space and corrosion-sensitive projects where PP material is preferred. | pH, salinity, chemical exposure, footprint, tank access, material preference and final equipment drawings. |
Selected YW DAF Model Range
| Model | Treatment Capacity | Dissolved Gas Water Volume | Total Power | Appearance Dimensions | Early Selection Use |
|---|---|---|---|---|---|
| YW-3 | 1-3 m3/h | 1-2 m3/h | 4.47 kW | 2,460 x 1,700 x 2,100 mm | Small flow pilot, compact pretreatment or low-capacity equipment review. |
| YW-20 | 15-20 m3/h | 5-6 m3/h | 5.75 kW | 5,160 x 2,200 x 2,300 mm | Moderate flow industrial pretreatment with oil or suspended solids review. |
| YW-50 | 45-50 m3/h | 15-17 m3/h | 11.35 kW | 7,860 x 2,950 x 2,550 mm | Higher flow front-end separation before downstream treatment equipment. |
| YW-100 | 95-100 m3/h | 46-50 m3/h | 18.1 kW | 12,960 x 3,200 x 2,850 mm | Large industrial flow review where footprint and lifting conditions matter. |
| YW-200 | 150-200 m3/h | 80-100 m3/h | 32.2 kW | 15,560 x 4,700 x 3,600 mm | Maximum YW range reference for major pretreatment equipment planning. |
Reference ranges support initial equipment comparison. Final dimensions, power, dosing scope and drawings are confirmed after wastewater and project review.
Application Scenarios For Industrial Pretreatment
DAF selection depends on pollutant behavior, not only the industry name. The same industry may need different dosing, flotation, biological or polishing routes after wastewater testing.
Food And Beverage
Slaughtering Wastewater
Papermaking
Textile And Dyeing
Electroplating And PCB
Refining And Petrochemical
Leather And Tannery
Municipal And Mixed Industrial
Manufacturing, Materials And Delivery Scope
DAF scope can include tank form, dosing interface, skimmer arrangement, dissolved-air components, control cabinet, corrosion-resistance needs, site access and container-oriented delivery planning.
Review Material Requirements
Define Dosing Boundary
Check Layout And Maintenance Access
Prepare Delivery Documents
Project Experience With DAF Pretreatment
Selected references include food, industrial neutralization and modular wastewater routes where DAF appears as a pretreatment or separation stage.
Slaughterhouse Wastewater Pretreatment
A DAF project for slaughterhouse wastewater where screening, oil control, flotation and downstream treatment review belong in one pretreatment route.
RO Neutralization Effluent DAF Unit
A DAF treatment system for neutralization effluent from RO-related wastewater, focused on suspended solids, oil and front-end pollutant separation.
Modular Wastewater Treatment Route
A 300 m3/day modular wastewater project combining DAF-related pretreatment and biological treatment equipment for a complete system route.
Prepare DAF Data For RFQ Review
A first inquiry can start with contact details, wastewater source, flow range, project target and any available drawings or water-quality report.
Prepare A Useful First Inquiry
Complete lab data is not required at the first contact. A clear starting message allows the treatment route, product range and follow-up questions to be narrowed quickly.
Motiva RFQ / Water Data Form
Water reports, drawings and site photos are useful, but the first review can start with basic flow, pollutant and site information.
Questions Before Selecting A DAF System
What wastewater is suitable for a dissolved air flotation system?
DAF is commonly reviewed for oils, grease, light flocs, suspended solids, coagulated colloids and hard-settling materials. Suitability depends on wastewater testing, chemical response, flow rate and downstream treatment targets.
Is DAF a complete wastewater treatment system?
DAF is usually a pretreatment or separation stage. A complete route may also need screening, equalization, dosing, biological treatment, filtration, oxidation, sludge handling or other equipment depending on the wastewater source and discharge target.
How is DAF capacity selected?
Capacity is selected from average flow, peak flow, operating hours, solids load, oil load, dosing condition, retention time, site layout and downstream process needs. YW DAF provides a reference range from 1 to 200 m3/h.
How do GW, YW and QDPP DAF options differ?
GW focuses on in-pump pressurized gas-liquid mixing and fine microbubbles. YW provides the clearest model ladder for capacity comparison. QDPP vertical-flow DAF uses PP material for compact and corrosion-sensitive applications.
Can you quote a DAF system price from flow rate only?
Flow rate is only one input. Price depends on wastewater type, oil and SS load, dosing scope, material, control requirements, sludge handling, site constraints, packing and delivery scope.
What data should be sent for DAF selection?
Send wastewater source, hourly and daily flow, oil and grease, SS, COD, pH, temperature, salinity if relevant, chemical dosing notes, discharge target, site layout and any available water-quality report.
Review DAF Equipment Before Final Route Design
Share water data, flow range, pollutant profile and site constraints to narrow the DAF model range, material direction and downstream treatment boundary.