Circular Daf Unit Dissolved Air Flotation Plant for Electroplating Wastewater Treatment

• Customization: Available
• After-sales Service: Yes
• Warranty: 2 Years
• Model NO.: QD-EVU-20
• Type: Flotation Machine
• Method: Physical Treatment
• Usage: Industrial, Agriculture, Hospital
• Material: Stainless Steel/Carbon Steel
• Motor: German
• Operation: Automatic
• Main Power: 0.75-22kw
• Function: Remove Cod BOD
• After-Sale Service: Long Term
• Flow Rate: Meet Client′s Need
• Transport Package: Standard Shipping Package
• Specification: 3.0m× 1.0m× 1.2m
• Trademark: Spark
• Origin: Qingdao China
• HS Code: 8421219990
• Production Capacity: 1000 Sets/Year
• Package Size: 1200.00cm * 250.00cm * 220.00cm
• Package Gross Weight: 10000.000kg

Product Description

 HOME/ABOUT US

We apply our experience and skill to design solutions for municipal, industrial, and minerals clients. We employ a wide variety of liquid/solids separation and biological treatment technologies. 

EVU Industries manufactures complete dissolved air flotation (DAF) clarifier systems. Remove FOG, TSS, BOD, COD, and pollutants from your wastewater. Review our DAF clarifiers below or contact us for more information.
Dissolved air flotation (DAF) for industrial wastewater treatment is a water clarification process that uses micro-bubbles to remove impurities and solids. The process is ideal for removing light impurities and solids that tend to float and suspend in liquid.

WHY WE USE DAF?

DAF systems separate solids, oils, greases, and other impurities from water. The clean water can be reused or discharged. DAF is used for a variety of goals, including:

• Treatment to meet discharge regulations
• TSS Removal
• Water recovery and reuse
• Pretreatment to reduce loading on downstream biological treatment systems
• COD & BOD Removal
• Polishing of biologically treated effluent
• Thickening of slurry
• Pretreatment for desalination plants utilizing reverse osmosis

HOW DOES DAF WORK?

DAF uses micro air bubbles (30-50 micron) that attach to impurities and flocculated particles and float them to the water's surface. Then a skimming system removes the sludge to a desludging trough, and clean water is recovered.

The clean water can be reused for process or discharged, and some of it is recycled back to the DAF process.

DAF CLARIFICATION STEPS

First, clean water needs to be accessible for a DAF system to startup. Clean water is necessary because DAF systems pressurize the water and mix it with pressurized air. Under pressure, the air dissolves, and when de-pressured, micro-bubbles form. The micro-bubbles are necessary to the cleaning process.

So, the first step is to fill the DAF system with clean water. If you fill the DAF unit with wastewater, you'll likely discharge wastewater for a long time. Plus, you risk damaging the recirculation pump and air saturation system.

 

Once clean water is in the system, a recirculation pump pulls some of the clarified water to a pressurization-saturation system. Next, the water is pressurized by a pump and mixed with pressurized air. Under this pressure, the air dissolves in the water.

Now the saturated water flows under pressure to the clarification tank. In the clarification tank, the pressure releases, and micro-bubbles form.

The micro-bubbles attach to the impurities from the incoming wastewater stream and pull them to the top. When sediment rises, a floating sludge blanket forms on top of the water within the clarifier.

 

Next, a skimming system gently removes the sludge from the top of the water. You'll see the skimmers pull sludge off the top and drop it into a desludging trough.

Finally, clean water is recovered through a supernatant system. Basically, the clean water comes out of a discharge point below the floating sludge and above the settled sludge.

 

DO DAF SYSTEMS MANAGE SLUDGE?

Most systems account for and manage settled sludge. DAF systems are ideal for wastewater streams that contain solids that float and settle.

In general, you'll find most manufacturers include a sediment compartment or basin with a sludge extraction system

CHEMICAL TREATREMNT WITH DAF

Coagulants and flocculants are regularly used to pretreat wastewater before it enters a DAF system.

Like other wastewater treatment methods, a DAF system can benefit from particles that bind due to flocculants. The skimming systems can remove a thicker, more dewatered sludge that may need little to no further dewatering.

WHAT APPICATIONS ARE DAF CLARIFIERS USED TO TREAT?

Food, Beverage & Dairy

Modular wastewater treatment | environmental compliance

Poultry, Meat Processing and Agricultural

Smart wastewater and manure treatment, turn cost into a profit

Heavy Industries

Help and consult O&G companies with managing water impact and minimizing risks

Municipal & Surface

Water and wastewater consultancy and equipment delivery

Technical Data Sheet

Data Model	EVU-5	EVU-10	EVU-20	EVU-30	EVU-40	EVU-50	EVU-60	EVU-80	EVU-100
Capacity(m^3/h)	5	10	20	30	40	50	60	80	100
Motor power(kw)	/		0.55
Scraper travelling speed(m/min)	/		2.26	2.1	2.3	2.5	2.55	2.64	2.82
Inclined plate quantity (pc)	10	15	38	46	50	56	58	60	64
Inclined plate size(mm)	1060*1200	1350*1465	750*1600	900*1600	1050*1600	1110*1600	1150*1800	1200*1200	1300*2000
Equivalent settling area(m^2)	6.36	14.83	22.8	33.12	42	49.7	60.03	72	83.2
Length (mm)	2400	3000	3750	4050	4340	4525	4725	4975	5175
Width (mm)	1340	1740	2220	2520	2820	3090	3190	3290	3490
Height(mm)	3050	3200	4650	4650	4700	4900	5100	5330	5330
The height from inlet pipe to ground (mm)	1300	1250	3350	3350	3350	3600	3650	3825	3825
The height from outlet pipe to ground (mm)	2550	2680	3400	3400	3450	3450	3650	3825	3825
Inlet pipe(mm)	DN80	DN100	DN125	DN150	DN150	DN150	DN150	DN200	DN200
Outlet pipe(mm)	DN80	DN100	DN125	DN150	DN150	DN150	DN150	DN200	DN200
Sludge discharge pipe(mm)	DN150		DN200
Inspection manhole(mm)	/		DN600