Dissolved Air Flotation

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Dissolved Air Flotation

Dissolved air flotation is a solid-liquid separator that many bubbles in contact with the solids, making their density lower than the water, and then they will float up to the surface so that suspended solids of water, including oil&grease without dissolving in water, can be reduced. DAF can be used in pretreatment, water reuse, deep treatment, phosphorus removal from tail water, etc. which is the critical equipment to reduce the SS, COD, BOD, total phosphorus, etc.


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PRODUCT INTRODUCTION

Key Attributes

Name	Dissolved Air Flotation	Size	According to your order
Brand Name	YOSUN	Power	According to your order
Place of Origin	Jiangsu, China	Color	Yosun standard or According to customer's requirement
Marketing Type	Hot Product 2024	Feature	High hydraulic load with skimmer
Warranty	1 Year	Function	SS removal BOD removal
Warranty of core components	1 Year	Application	Wastewater Treatment
Productivity	100-50000L/Hour	Capacity	2-200m³/h
Weight (KG)	1300-13000KG	Video outgoing-inspection	Provided
Material	According to your order	Machinery Test Report	Provided
Weight	4000-150000KG	Transport	According to your order

Dissolved air flotation home page picture

Product Details

what is dissolved air flotation ？

Dissolved air flotation is a solid-liquid separator in many bubbles in DAF contact with the solids, lowering their density compared to water. Then, they will float up to the surface so that suspended solids of water, including oil and grease, without dissolving in water, can be reduced. DAF can be used in pretreatment, water reuse, deep treatment, phosphorus removal from tailwater, etc., which is critical equipment to reduce the SS COD, BOD, and total phosphorus.

Dissolved air flotation working process（Video Description）

Dissolved air flotation equipment takes the treated effluent through the circulating pump as circulating water and enters the dissolved air tank. The air-saturated dissolved air water is sent into the air flotation contact area, and then through the instantaneous pressure release of the releaser, a large number of nano-scale micro-bubbles are generated, and the micro-bubbles quickly attach to the coagulated suspended matter, and the density of the suspended matter is gradually less The density of water automatically rises to the surface, leaving clean water at the bottom of the equipment, which is discharged to the clean water area through the water outlet at the bottom. The scum that floats to the surface is scraped to the scum pool by a slag scraper for further treatment.

Dissolved air flotation Working Process

DAF-Working-Process2

Product Advantages

Dissolved air flotation Advantages

① The particle size of microbubbles is 10-30um, and the residence time in water is longer.

② Surface load up to 10-30m³ /(m²· h) compact style to save the space.

③ Gas-water mixing efficiency is higher than 95%.

④ Complete system and easy to install.

⑤ High integration, efficient and simple operation.

⑥ Intelligent air suction, more energy saving equipment.

⑦ Top - in release, realizing non-stop maintenance.

⑧ Adjustable liquid level system and slag scraping system can control the moisture content of scum.

⑨ Professional supporting design and suggestions.

Application Fields

Dissolved air flotation Application Fields

Petrochemical, slaughtering, food.（Oil removal, SS reduction, COD reduction）
Printing and dyeing, textile, tanning.（Reduce SS, decolorization and COD）
Paper making, pharmaceutical.(Reduce SS and COD)
Final discharged water further improvment.(Phosphorus removal, SS reduction)
Reuse of reclaimed water.(Reduce SS and remove oil)
River, landscape water.(Reduce SS and turbidity)
New energy, precious metal recovery.(Reduce SS and remove fluorine)
Landfill leachate.(Reduce back-end biochemical load)
Surface treatment.(Heavy metals, SS reduction)

Dissolved air flotation technology parameter table

Model	Capacity(m³/h)	Nozzle List(DN)				Dimension(mm)
Model	Capacity(m³/h)	Inlet	Outlet	Sludge	Vent	L	L1	L2	W	W1	H
RDAF-002	2	DN50	DN50	DN100	DN50	3000	2200	400	700	700	1600
RDAF-003	3	DN50	DN50	DN100	DN50	4300	3300	500	800	700	1900
RDAF-005	5	DN80	DN80	DN100	DN50	4700	3500	500	1000	700	1960
RDAF-010	10	DN100	DN100	DN100	DN80	5700	4500	500	1200	700	1960
RDAF-015	15	DN125	DN100	DN150	DN80	6200	5000	500	1500	700	1960
RDAF-020	20	DN150	DN150	DN150	DN80	6200	5000	600	1800	700	1960
RDAF-030	30	DN150	DN150	DN150	DN80	7200	6000	700	2000	700	2050
RDAF-040	40	DN200	DN150	DN150	DN80	8200	7000	900	2200	700	2050
RDAF-050	50	DN200	DN150	DN150	DN80	8200	7000	1000	2700	700	2050
RDAF-060	60	DN250	DN200	DN150	DN80	9200	8000	1000	2800	700	2050
RDAF-080	80	DN250	DN250	DN150	DN100	11200	10000	1200	3200	700	2050
RDAF-100	100	DN300	DN250	DN150	DN100	11700	10500	1200	3600	700	2050
RDAF-150	150	DN350	DN350	DN250	DN100	14200	13000	2200	3600	700	2050
RDAF-200	200	DN400	DN400	DN250	DN100	15200	14000	2700	4000	700	2050

Model	Weight(Kg)	Operating Weight(Kg)	Power
Model	Weight(Kg)	Operating Weight(Kg)	Reflux Pump(KW)	Air Compressor(KW)	Skimmer(KW)	chemical reaction tank(KW)
RDAF-002	1300	4000	0.55	0.55	0.1	0.25	0.12
RDAF-003	1500	5000	0.75	0.55	0.12	0.25	0.12
RDAF-005	1600	7000	1.1	0.55	0.12	0.25	0.12
RDAF-010	2000	12000	1.5	0.75	0.12	0.25	0.12
RDAF-015	2200	18000	2.2	0.75	0.12	0.25	0.12
RDAF-020	3000	22000	2.2	0.75	0.12	0.55	0.25
RDAF-030	3800	32000	3	1.5	0.12	0.55	0.25
RDAF-040	5000	45000	5.5	1.5	0.12	0.55	0.25
RDAF-050	5500	55000	7.5	1.5	0.12	0.55	0.25
RDAF-060	6000	66000	7.5	1.5	0.12	0.75	0.37
RDAF-080	7500	100000	11	1.5	0.12	0.75	0.37
RDAF-100	9000	110000	15	2.2	0.18	0.75	0.37
RDAF-150	11000	130000	15	2.2	0.18	2.2	1.1
RDAF-200	13000	150000	22	4	0.18	2.2	1.1

Dissolved air flotation outline drawing

Dissolved air flotation outline drawing

1. Air dissolving system	2. Main Tank	3. Electric control cabinet	4. Chemical reaction tank
5. Micro-bubble releaser	6. Skimmer system	7. Returning line	a. Raw water inlet pipe
b. Clean water outlet pipe	c. Foam discharge pipe	d1. Reaction area vent pipe	d2. Vent tube in contact area
d3. Separate area vent pipe

DAF Accessories list

Parts Name	Accessories Pictures	Parts Name	Accessories Pictures
Chain		Float level switch
Releaser		Pressure Gauge
Rubber Scraper		Chain wheel

Product Details

Dissolved air flotation product details

Effectiveness of equipment

Dissolved air flotation Effectiveness of equipment

Dissolved-air-flotation-Effectiveness-of-equipment

Cooperation Case

Tarim Ethane to Ethylene Project

Environmental Protection Technology City Industrial Wastewater Treatment Plant Project

Oil and emulsion project for a fuel recycling enterprise in Zhejiang

Thailand Seafood Processing Wastewater Treatment Plant Project

who we are

Wuxi Yosun Environmental Protection Equipment Co., Ltd was established in 2011. After years of development, we have a set of research and development, design, manufacturing, and services in one professional team.
Our products are exported to more than 30 countries and regions worldwide. They are used in various fields such as municipal, chemical industry, paper marking, new energy, pharmacy, and landscape.

20

Years Industry Experience

3000

Square Meters Manufacturing workshop

8

<8 Hours Customized Solution

30

30+ R&D and production personnel

Our Quality control process

1. Raw material procurement and
acceptance

Strictly select raw material suppliers to ensure that raw materials meet quality requirements. Each batch of raw materials undergoes acceptance inspection.
2. Production process control

Strictly follow the manufacturing process requirements, includingwelding, assembly, installation and other links. Quality checkpoints are set up in every link.
3. Equipment debugging and trialoperation

After completing the equipment manufacturing, carry outequipment debugging and trial operation to check the performance and operational stability of the equipment to meet customer's request.
4. Quality inspection and testing

Conduct equipment appearance inspection, functional testing, stress testing, etc. to ensure that equipment quality meets customer needs and relevant standards.
5. Product packaging and factory inspection

Packaging and factory inspection of equipment. Make sure the equipment is not damaged during transportation and meets factory standards.
6. After-sales service tracking

Carry out after-sales service tracking for equipment that has left the factory, and promptly handle customer feedback issues and opinions to ensure the stability and reliability of the equipment during.

Production link display

Type of Shipping

Type of Shipping-Standard container

Type-of-Shipping

Visualization
Conn Type	20'DC	40'DC	40'HC	20'OT	40'OT	20'FR	40'FR	20'RF	40'RF
Outside dimensions
Length,m	6.058	12.192	12.192	6.058	12.192	6.058	12.192	6.058	12.192
Width,m	2.438	2.438	2.438	2.438	2.438	2.438	2.438	2.438	2.438
Height,m	2.581	2.591	2.896	2.591	2.591	2.591	2.591	2.896	2.591
Internal dimensions
Length,m	5.898	12.032	12.032	5.898	12.032	5.612	11.656	5.506	11.207
Width,m	2.352	2.352	2.352	2.352	2.352	2.227	2.208	2.304	2.246
Height,m	2.385	2.385	2.698	2.348	2.348	2.213	1.955	2.602	2.183
Other dimensions
Doonway	2340×2280	2340×2280	2340×2585	2340×2280	2340×2280			2300×2539	2216×2118
Tare weight,kg	2.330	4.000	3.840	2.300	4.300	2.750	4.900	3.325	3700
Capacity,m³	33.1	67.5	76.4	32.5	65.9			25	58
Available load,kg	21.610	26480	26.640	28.180	26.680	31.250	45.100	23.675	25.

Customized export special wooden box

Customized-export-special-wooden-box

FAQs

What is the capacity of the range of DAF dissolved air flotation systems?

The range of DAF dissolved air flotation systems is specially designed for industrial applications that usually experience high solid loading. We manufacture standard sizes, the most suitable models, and dissolved air recycle systems to suit specific wastewater characteristics.
How to choose a suitable model to get a quote?

According to the amount of wastewater treatment, please select the appropriate model according to our selection table or contact us directly to obtain the proper model and quotation.
Can the dissolved air flotation system handle variable load and flows?

It depends. In the application without chemicals, the DAF dissolved air flotation system can operate under any flow rate and solid load and effectively treat wastewater to achieve its design capability. If chemicals are being dosed, on the contrary, it will adversely affect the chemical process.
Do I need to dose chemicals into the wastewater?

Dumping chemicals into the wastewater upstream of the DAF dissolved air flotation system will improve its performance. Whether it is necessary to dose chemicals depends on the required water quality.
How much sludge will the DAF dissolved air flotation system generate?

You can estimate the amount of sludge generated by multiplying the solids load by the daily flow or contact me.
What is the performance of the DAF dissolved air flotation system regarding pollutant removal?

The DAF dissolved air flotation system can remove over 99% of solids and grease, significantly reducing BOD and COD. Nutrients and metals can also be removed using the DAF dissolved air flotation process.
Does the DAF dissolved air flotation system require much power?

The power demand for the actual DAF dissolved air flotation system is minimal. You can refer to our selection table or contact us.
Can the DAF dissolved air flotation system system handle large solids?

It can, but large solids can cause blockages and increase the chances of sedimentation occurring. We recommend installing a 1 -2 mm screen upstream of the DAF dissolved air flotation system. Please check our website or contact us for information on our range of screens.
Is the DAF dissolved air flotation system easy to maintain?

Yes, the system can often be maintained by in-house personnel. The DAF dissolved air flotation system rarely fails. If you need support services, pls contact us.
How long is the after-sale warranty period of DAF dissolved air flotation system?

The warranty period is 24 months after acceptance or 26 months from the data of delivery.