Dissolved Air Flotation Electrocoagulation Wastewater Treatment Equipment for Sewage Treatment

Basic Info.

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

Packaging & Delivery

Package Size1200.00cm * 250.00cm * 220.00cm Package Gross Weight10000.000kg

Product Description

HOME/ABOUT US WHY WE USE DAF? HOW DOES DAF WORK? DAF CLARIFICATION STEPS
DO DAF SYSTEMS MANAGE SLUDGE?

CHEMICAL TREATREMNT WITH DAF WHAT APPICATIONS ARE DAF CLARIFIERS USED TO TREAT?



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.

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

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.

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.

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

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.

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 EVU Technological Parameter

MODEL	CAPACITY (M3/H)	DIMENSION (M)	PUMP POWER (KW)	AIR COMPRESSOR POWER (KW)	TOTAL POWER (KW)
EVU-5	5	3.0*1.0*1.2	1.1	----	1.5
EVU-10	10	3.5*1.2*1.5	1.5	----	1.9
EVU-20	20	5.0*1.5*1.5	3	----	3.4
EVU-30	30	6.0*1.8*2.0	4	----	4.4
EVU-50	50	7.0*2.0*2.0	7.5	3	11.12
EVU-70	70	9.0*2.0*2.0	7.5	3	11.5
EVU-80	80	9.5*2.5*2.0	7.5	4	14.1
EVU-100	100	12.0*2.5*2.0	11	4	17.6
EVU-150	150	14.0*3.0*2.5	15	5.5	23.8
EVU-200	200	16.0×3.0×2.5	18	5.5	27.1