Products

RDAF High-Efficiency DAF System

A compact dissolved air flotation system for efficient removal of suspended solids, oil, grease, flocs, turbidity, COD, BOD and total phosphorus from wastewater.

Product Overview

The High-Efficiency Dissolved Air Flotation (DAF) System is a compact solid-liquid separation unit for industrial and municipal wastewater treatment.

The system uses pressurized dissolved air water to generate fine microbubbles. These microbubbles attach to suspended solids, oil droplets and flocs, reducing their apparent density and lifting them to the water surface. The floating scum is then removed by a skimmer, while clarified water is discharged from the clean water outlet area. This working principle is consistent with the common DAF process used for oil and solids removal in wastewater treatment.

DAF can be used for wastewater pretreatment, reclaimed water reuse, advanced treatment and phosphorus removal from tailwater. It is suitable for reducing SS, COD, BOD, oil and grease, turbidity and total phosphorus before downstream biological treatment, filtration, reuse or discharge.

Typical Process Flow:
Wastewater Collection → Coagulation Dosing → Flocculation → High-Efficiency DAF System → Scum Removal → Clarified Water Outlet → Biological Treatment / Filtration / Reuse / Discharge
Floating Scum → Sludge Handling / Dewatering

This product is a professional sewage treatment solution developed for [target sewage types such as municipal domestic sewage/industrial organic wastewater/breeding wastewater/medical wastewater]. Integrating [core technologies such as biological treatment/membrane separation/advanced oxidation/intelligent control], it can efficiently remove pollutants including COD, BOD, ammonia nitrogen, total phosphorus, suspended solids, and toxic and harmful substances from sewage. With core advantages of [small footprint/low operating cost/high treatment efficiency/easy operation and maintenance], the product is widely applicable to [application scenarios such as urban communities, industrial parks, livestock and poultry farms, medical institutions, scenic spots]. The treated effluent can meet [specific standards such as GB18918-2002 Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants (Grade 1A) / local customized discharge standards], realizing harmless discharge or resource recycling of sewage

Core Advantages

Fine Microbubble Generation
Microbubble size is typically 10–30 μm, helping improve attachment to flocs and oil droplets.
High Surface Loading
Surface load can reach 10–30 m³/(m²·h), helping save installation space.
High Gas-Water Mixing Efficiency
Gas-water mixing efficiency can be higher than 95%, supporting stable flotation performance.
Integrated System Configuration
The unit can include an air dissolving system, main flotation tank, chemical reaction tank, microbubble releaser, skimmer and electric control cabinet.
Automatic Scum Removal
The skimmer system removes floating sludge from the surface and transfers it to the scum discharge area.
Wide Pollutant Removal Scope
Suitable for removing suspended solids, oil, grease, flocs, turbidity, COD, BOD and total phosphorus.

Efficient Purification & Compliance Assurance
Adopting [core technology name], it can rapidly decompose complex pollutants in sewage with a pollutant removal rate of up to [specific percentage, e.g., over 95%], ensuring stable compliance of effluent quality and strong adaptability to fluctuations in water quality.
Energy Conservation, Environmental Protection & Cost Control
Designed in line with energy-saving concepts, the equipment/agent [e.g., uses low-power motors/zero chemical addition with biological strains/circulating treatment process], significantly reducing energy consumption and chemical costs during operation. It also minimizes sludge production and lowers solid waste disposal expenses.
Flexible Adaptation & Easy Installation
To meet diverse scenario requirements, it offers [modular assembly/mobile deployment/customized configuration] solutions, occupying only [specific ratio, e.g., 60%] of the area of traditional processes. Whether for new projects or renovation of old facilities, installation and commissioning can be completed quickly.
Intelligent Management & Hassle-Free Operation
Equipped with [intelligent sensors/Internet of Things (IoT) monitoring platform/automatic dosing system], it can real-time monitor water quality indicators and equipment operating status, supporting remote control and fault early warning. No on-site personnel are required, reducing the threshold for manual operation and maintenance.
Green Sustainability & Resource Recycling
The treated effluent can be used for [farmland irrigation/landscaping irrigation/industrial cooling water/municipal miscellaneous use] as needed, realizing water resource recycling. Sludge can be converted into [organic fertilizer raw materials/biomass fuel] after further treatment, aligning with green development concepts.

Application Scope

Petrochemical wastewater
Slaughterhouse wastewater
Food processing wastewater
Textile wastewater
Printing and dyeing wastewater
Tanning wastewater
Paper-making wastewater
Pharmaceutical wastewater
Landfill leachate
Surface treatment wastewater
Tailwater phosphorus removal
Reclaimed water reuse
River, lake and landscape water treatment
New energy wastewater and precious metal recovery pretreatment
Industrial wastewater pretreatment before biological treatment or advanced treatment

Municipal Field: Urban domestic sewage treatment plants, centralized sewage treatment in urban villages, black and odorous water body remediation of rivers
Industrial Field: Treatment of production wastewater from food processing, textile printing and dyeing, chemical industry, electroplating, papermaking and other industries
Agricultural Field: Livestock and poultry breeding wastewater, farmland irrigation tailwater, aquaculture water circulation treatment
People's Livelihood Field: Medical institution sewage, sewage from schools/hotels/scenic spots, decentralized rural sewage treatment

Service Guarantee

SFC provides technical support for water quality evaluation, process selection, equipment model selection, layout design, installation guidance and commissioning.

Before selection, wastewater flow rate, SS, COD, BOD, oil and grease, total phosphorus, pH, temperature and target effluent requirements can be evaluated. Coagulation and flocculation tests can also be used to determine chemical selection, dosage and expected separation performance.

The DAF model, recycle ratio, tank size, nozzle size, skimmer type, dissolved air system, dosing system and control configuration should be selected according to wastewater flow and pollutant load.

Customized Solutions: Provide one-on-one technical scheme design based on customers' water quality, water volume, site conditions and discharge standards.
Full-Process Service: Cover one-stop services including scheme design → production and manufacturing → installation and commissioning → personnel training → after-sales maintenance.
After-Sales Response: Establish a 7×24-hour after-sales service system. After a fault report, response within [specific time, e.g., 2 hours] and on-site handling within 24 hours.
Long-Term Cooperation: Offer value-added services such as chemical supply, equipment inspection and technical upgrading to ensure long-term stable operation of the product.

Parameter

Model Spec.		RDAF-002	RDAF-005	RDAF-010	RDAF-020	RDAF-030	RDAF-050	RDAF-080	RDAF-100	RDAF-150	RDAF-200	Remark
Capacity (m³/h)		2	5	10	20	30	50	80	100	150	200	Final equipment dimensions, material, pump power, compressor power, dosing system and control configuration should be confirmed according to wastewater characteristics and project requirements.
Pipe Connection	Inlet	DN50	DN80	DN100	DN150	DN150	DN200	DN250	DN300	DN350	DN400
	Outlet	DN50	DN80	DN100	DN150	DN150	DN150	DN250	DN250	DN350	DN400
	Sludge Discharge	DN100	DN100	DN100	DN150	DN150	DN150	DN150	DN150	DN250	DN250
	Vent	DN50	DN50	DN80	DN80	DN80	DN80	DN100	DN100	DN100	DN100
External Dimensions (mm)	L	3000	4700	5700	6200	7200	8200	11200	11700	14200	15200
	W	700	1000	1200	1800	2000	2700	3200	3600	3600	4000
	H	1600	1960	1960	1960	2050	2050	2050	2050	2050	2050
Weight (kg)		1300	1600	2000	3000	3800	5500	7500	9000	11000	13000
Operating Weight (kg)		4000	7000	12000	22000	32000	55000	100000	110000	130000	150000

Item	Technical Specifications
Treatment Capacity	[5-500 m³/d (equipment); 1kg agent treats XX m³ sewage (agent)]
Inlet Water Quality	COD≤[ ]mg/L, Ammonia Nitrogen≤[ ]mg/L, SS≤[ ]mg/L
Effluent Standard	[XXX Standard] Grade XXX
Operating Power/Dosage	[XX kW; XX g/m³ sewage]
Floor Area/Storage	[XX ㎡; cool & dry place]

Advantages

Integrated R&D Strength

Backed by cooperation with leading domestic universities, we continuously develop efficient and reliable sludge treatment equipment, ensuring advanced technology and stable long-term performance.

Complete Product Range

We supply sludge dewatering machines, thickeners, dryers, dosing systems and full disposal solutions, meeting both single-equipment demands and integrated system requirements.

One-Stop Solutions

From technical consultation and solution design to on-site installation and commissioning, we provide end-to-end services tailored to each customer’s operating conditions.

Global Project Experience

Our equipment is widely applied in municipal and industrial wastewater treatment and has been successfully exported to Southeast Asia, Russia and South America.

Successful Cases

SST Screw Sludge Thickener Project in Shaanxi

TR Reciprocating Circulation Sludge Drying Project in Jiangsu

FTE3 Belt Sludge Dewatering Project in Anhui

SD High-pressure Belt Sludge Deep Dewatering Project in Liaoning

FTB Rotary Drum Sludge Dewatering Project in Suzhou

FBT Belt Sludge Thickener Project in Hubei

Faqs

DAF stands for Dissolved Air Flotation. It is a wastewater clarification process that uses fine air bubbles to lift suspended solids, oil, grease and flocs to the water surface for removal.

It is mainly used to remove suspended solids, oil, grease, flocs and turbidity. With proper chemical dosing, it can also help reduce COD, BOD and total phosphorus.

In many industrial wastewater applications, coagulation and flocculation dosing are recommended to improve floc formation, flotation efficiency and pollutant removal.

Microbubbles attach to suspended solids and oil droplets, making the floc-bubble mixture lighter than water so it can float to the surface and be removed.

The reference model range covers approximately 2–200 m³/h. Larger or customized systems can be designed according to project requirements.

Yes. DAF can be used as pretreatment or clarification before filtration, membrane treatment or reclaimed water reuse.

Key factors include influent SS, oil content, COD, pH, floc size, chemical dosage, recycle ratio, dissolved air pressure, hydraulic loading and skimmer adjustment.

Please provide wastewater flow rate, SS, COD, BOD, oil and grease, total phosphorus, pH, operating hours, target effluent quality and available installation space.

How long will it take to get a reply after we send you the inquiry?

We will get back to you within 12 hours after receiving the inquiry during working days.

What products can you offer?

We mainly make equipment related to wastewater treatment such as aeration systems, filters, sludge dewatering equipment, and sludge drying equipment.

Can you make customized products?

Yes, we mainly make customized products. We develop and produce products according to the drawings or actual needs provided by customers.

How will the goods be delivered to the customer?

We usually ship goods by sea, which is very convenient for exporting.

Are you a direct manufacturer or a trading company?

We have our own processing factory, and we also have our own international trade department, we produce and sell all by ourselves.

What are the main application areas of your products?

Municipal sewage treatment plants, water purification plants, chemical, food, mining, papermaking, pharmaceuticals, printing and dyeing industries.

How does your company guarantee the quality of your products?

There will be corresponding inspections after each process, and for the final completed product, we will conduct a full inspection according to customer requirements and international standards. Control the quality of products according to the ISO quality system.

Where do you mainly export your goods?

Our products are mainly exported to Southeast Asia, the Middle East, South America, Eastern Europe, and other countries.