Hangzhou Kaihong Membrane Technology Co., Ltd.
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Reinforced Ultra Filtration for Ground Water Purification with 0.03um pore size
Ultrafiltration (UF) is a membrane filtration process using pressure as a driving force to remove a large majority of contaminants including particulate matter, bacteria, viruses, and high molecular substances from water or process feed streams. Depending on the pore size of the UF membrane and the size of the particles suspended in the feed water, certain particles will pass through the membrane (typically low molecular weight solutes and dissolved solids) while others are rejected (e.g. suspended solids, bacteria, viruses, and high molecular weight substances). This separation process is widely used in water treatment, industry, and research for purification and concentration of solutions. Ultrafiltration is not fundamentally different from microfiltration, except in terms of the size of the molecules it retains. The basic process of membrane filtration is shown in Figure 1. The process is pressure driven and typically operates with a feed pump, pushing the water through the membrane.
The filtration spectrum and the selectivity of various filtration methods are shown in Figure 2. Because UF membranes reject particles based on size exclusion principles, they are often classified according to the size of the separated components. UF membranes may be classified by molecular weight cutoff (MWCO) in Daltons (1 Dalton is equivalent to 1 atomic mass unit) or by pore size (the nominal diameter of the openings or micro pores) in microns. The MWCO of the membrane refers to the molecular weight (in Daltons) of the molecule or solute that is 90% retained by the membrane. Typically, UF membranes are classified by a range from about 1,000 to 500,000 Daltons (Da). But as the membrane becomes more open (greater than 100,000 Da), it is common to see UF membranes classified by pore size.
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Size and weight
| Model | KH-UF-4040W-PVDF | KH-UF-6040W-PVDF |
| Module Diameter ( A, mm) | Φ90 mm | Φ160 mm | |
| Module Length ( B, mm) | 960mm | 960mm | |
| Module Length (C, mm) | 1106 mm | 1304 mm | |
| Size of Inlet/Outlet (D, mm) | DN25 | DN32 | |
| Operating Type | Outside to Inside | Outside to Inside | |
| Membrane Area | 8.0 m2 | 20 m2 | |
| Dry weight of the module | 5 Kg | 12 Kg | |
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Parameters | Shell material | UPVC | UPVC |
| Membrane Material | PVDF | PVDF | |
| Membrane pore size | 0.03μm | 0.03μm | |
| Inner diameter of the hollow fiber | 0.7 mm | 0.7 mm | |
| Outer diameter of the hollow fiber | 1.3mm | 1.3mm | |
| Turbidity of Permeating water | ≤ 0.2NTU | ≤ 0.2 NTU | |
| SDI value of permeating water
| ≤ 3 | ≤ 3 | |
| Flux rate of purified water (0.10MP,20℃) | ≥1000L/H | ≥3000L/H | |
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Typical Process
| Temperature Range | 5-45 ℃ | 5-45 ℃ |
| PH Value Range | 2-13 | 2-13 | |
| Permeating Flux rate for different Water | 40 - 80 l/m2/hr | 40 -80 l/m2/hr | |
| Operating Pressure | ≤0.12 MPa | ≤0.12MPa | |
| Maximum Inlet Pressure | 0.2 MPa | 0.2MPa | |
| Backwashing flux rate | 1.5-2.0 times of Permeating Flux | 1.5-2.0 times of Permeating Flux | |
| Backwashing times | Once per 30-120 minutes | Once per 30-120 minutes | |
| Chemical cleaning online during backwashing | Once per 7-14 days | Once per 7-14 days |
The whole installation and application process of our MBR modules are described as the following photo: