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Water Purification Process Dairy Processing Waste Water Treatment Dissolved Air Flotation (DAF)
In the water treatment process, solid-liquid separation and its equipment are one of the key projects. DAF dissolved air flotation is one of the most effective methods whose specific gravity is close to 1.0 from water.
DAF dissolved air flotation has several features as follows:
l Small footprint, lower energy consumption; easy operation and simple management
l High efficiency of dissolved air, stable treatment effects. Electro-mechanic instruments are integrally controlled
l This equipment's dissolved air efficiency reaches up to 90%. But its volume is only one fifth of the ordinary dissolved air system. Moreover, it has stronger anti-clogging capability than other DAF dissolved air flotation
l This equipment uses new type dissolved air releaser with the advantages of high releasing degree and self-cleaning functions. And the average particle size of micro bubbles is about 15~30 μm
l This equipment uses chain-plate-type skimmer with advantages of stable operation and high efficiency of scraping
The dimensions and other information of Benenv DAF dissolved air flotation are as follows:
| Model | Capacity | Power(kw) | Dimension(m) | Pipe connection(DN) | ||||||
| (m3/h) | Recycle pump | Air compressor | Skimming system | L/L1 | W/W1 | H/H1 | (a) Water inlet | (b) water outlet | (c) sludge outlet | |
| BNDAF-002 | ~2 | 0.75 | 0.55 | 0.2 | 3.2/2.5 | 2.4/1.16 | 2.2/1.7 | 40 | 40 | 80 |
| BNDAF-003 | ~3 | 0.75 | 0.55 | 0.2 | 3.5/2.8 | 2.4/1.16 | 2.2/1.7 | 80 | 80 | 100 |
| BNDAF-005 | ~5 | 1.1 | 0.55 | 0.2 | 3.8/3.0 | 2.4/1.16 | 2.2/1.7 | 80 | 80 | 100 |
| BNDAF-010 | ~10 | 1.5 | 0.55 | 0.2 | 4.5/3.8 | 2.7/1.36 | 2.4/1.9 | 100 | 100 | 100 |
| BNDAF-015 | ~15 | 2.2 | 0.75 | 0.2 | 5.5/4.5 | 2.9/1.6 | 2.4/1.9 | 100 | 100 | 100 |
| BNDAF-020 | ~20 | 3 | 0.75 | 0.2 | 5.7/4.8 | 3.2/2.2 | 2.4/1.9 | 150 | 150 | 150 |
| BNDAF-030 | ~30 | 3 | 0.75 | 0.2 | 6.5/5.5 | 3.2/2.2 | 2.5/2.0 | 150 | 150 | 150 |
| BNDAF-040 | ~40 | 5.5 | 0.75 | 0.2 | 7.7/6.7 | 3.6/2.6 | 2.5/2.1 | 200 | 200 | 150 |
| BNDAF-050 | ~50 | 5.5 | 0.75 | 0.2 | 8.1/7.1 | 3.6/2.6 | 2.5/2.1 | 200 | 200 | 150 |
| BNDAF-060 | ~60 | 7.5 | 1.5 | 0.2 | 9.5/8.4 | 3.8/2.8 | 2.5/2.1 | 250 | 250 | 150 |
| BNDAF-070 | ~70 | 7.5 | 1.5 | 0.2 | 10.0/9.0 | 3.8/2.8 | 2.5/2.1 | 250 | 250 | 150 |
| BNDAF-080 | ~80 | 11 | 1.5 | 0.2 | 10.5/9.5 | 4.0/3.0 | 2.5/2.1 | 250 | 250 | 150 |
| BNDAF-100 | ~100 | 15 | 2.2 | 0.2 | 11.7/10.6 | 4.2/3.2 | 2.5/2.1 | 300 | 300 | 150 |
| BNDAF-120 | ~120 | 15 | 2.2 | 0.2 | 12.5/11.4 | 4.4/3.4 | 2.5/2.1 | 300 | 300 | 150 |
DAF dissolved air flotation consists of flotation tank, dissolved air system, reflux pipe, dissolved air released system, skimmer (Based on customer needs, there are combined type, traveling type and chain-plate type to choose.), electric cabinet and so on.
Air flotation separation technology of Benenv DAF dissolved air flotation dissolves air into water at certain working pressure. In the process, pressurized water is saturated with dissolved air and is discharged into a flotation vessel. The microscopic air bubbles produced by released air attach to suspended solids and float them to the surface, forming a sludge blanket. A scoop removes the thickened sludge. Finally, it complete purifies the water.
Air flotation technology of DAF dissolved air flotation plays an important role in solid-liquid separation (Simultaneously reduce COD, BOD, chroma, etc). Firstly, mix flocculating agent into raw water and stir thoroughly. After the effective retention time (lab determines the time, dosage and flocculation effect), the raw water enters into the contact zone where microscopic air bubbles adhere to the floc and then flows into the separation zone. Under the buoyancy effects, the tiny bubbles float the flocs to the surface, forming a sludge blanket. A skimming device removes the sludge into the sludge hopper. Then the lower clarified water flows into the clean-water reservoir through the collecting pipe. Some of water are recycled to the flotation tank for the air dissolving system, while others will be discharged.
As a waste water process, DAF dissolved air flotation is widely used in sewage treatment and water purification engineering. DAF dissolved air flotation is suitable for:
l Increase effluent recycling and fresh water reusing in paper and pulp
l Removal of heavy metal ions
l Separation of oil refinery effluent
l Removal of tannery wastewater
l Removal of chromaticity and impurities in printing and dyeing wastewater
l Solid-liquid separation of sewage and membrane after all kinds of bio-treatment
l Sludge concentration (capacity: 20%~ 30%, except the dedicated device which can be designed according to the requirements)
Jiangsu Benenv Environmental Technologies Co., Ltd.
Contact: Zoe Wang
Tel: 86-510-80798006
Address: Building C, Xieqiao Industry Park, No.28 Yuedong Rd, Yixing(China)
Japan R&D Center: 920-0276 Chateau 177B 3-35 Kanaiwahigashi 1 Chome, Kanazawa-City, Ishikawa-Pref (Japan)
Website: , .jp
1. BENENV has more than 2 decades of experience in wastewater and sludge treatment.
2. We introduce Japanese technology and hire Japanese experts, thus our product is far more better than other Chinese manufacturers.
3. We only use the best parts from best supplier.
4. We have our own R&D center and complete manufacture system.
BENENV has clients in over 37 countries!
Send Inquiry to This Supplier
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