Hollow Fiber PVDF Ultrafiltration Membranes

1. High filtration precision, reliable purification results

The membrane pore size is typically 0.001-0.1μm, effectively intercepting impurities such as bacteria, viruses, colloids, large organic molecules, and suspended solids in water, while retaining beneficial minerals (such as calcium and magnesium ions). The resulting filtered water is crystal clear, directly meeting basic purification needs for drinking water, industrial process water, and other applications.

Case: After being used by a municipal water plant, the turbidity of raw water dropped to below 0.1NTU, and the bacteria removal rate was as high as 99.9%.

2. High Flux and Efficiency

The hollow fiber structure significantly increases the membrane's specific surface area (effective filtration area per unit volume), resulting in higher filtration flux for the same volume. This allows for rapid treatment of large volumes of water, making it suitable for large-scale water treatment applications (such as municipal and industrial wastewater treatment).

Case: In a wastewater treatment project in an industrial park, the average daily processing capacity of a single membrane module reached 5,000 m³, meeting the reclaimed water reuse needs of approximately 3,000 people.

3.Low operating costs and excellent energy efficiency

The filtration process requires only a low operating pressure (typically 0.1-0.3 MPa), resulting in significantly lower energy consumption than deep filtration technologies such as reverse osmosis. Furthermore, the membrane modules can be restored through backwashing and chemical cleaning, extending their service life (typically 3-5 years) and reducing replacement costs.

4.Strong anti-pollution ability and wide adaptability

Some materials (such as PVDF membranes) are resistant to acid, alkali, and oxidation, and can withstand complex water conditions (such as highly polluted industrial wastewater and high-salinity environments). Processes such as cross-flow filtration can reduce the deposition of pollutants on the membrane surface, slowing membrane fouling and maintaining stable operation.

5. Flexible Application Scenario and Strong Compatibility

It can be used independently as a deep filtration unit or in combination with other processes (such as pretreatment, reverse osmosis, and nanofiltration). It is highly compatible with a variety of scenarios, including drinking water purification, wastewater treatment and reuse, and industrial purification.

Polyvinylidene fluoride (PVDF) ultrafiltration membrane

This material is corrosion-resistant, antioxidant, acid- and alkali-resistant, and chemically stable. The membrane fibers utilize fiber composite manufacturing technology and undergo special processes, including permanent hydrophilic modification, to create a gradient mesh pore structure. Precise pore size control enables precise material separation, high recovery rates, and stable performance. Bacterial retention rates exceeding 4LOG are achieved, significantly improving water flux while maintaining stable performance.

- High Flux and Low-Temperature Resistance: The permanently hydrophilized PVDF material and gradient network pore structure provide exceptionally high permeability, increasing flux by 40% at the same low-temperature pressure differential.

- High Peel Strength: Utilizing a crocheted cord lining, securely bonded to the PVDF functional layer, the single-filament peel strength reaches ≥1.5 MPa, effectively eliminating membrane filament deformation, breakage, and the fragility of the functional layer, ensuring long-term stable water quality.

- Positioned Wire Arrangement Technology: Effectively prevents entanglement, tangling, and mud accumulation caused by cross-linking of membrane filaments. The soft rubber at the base of the membrane filaments provides a cushioning protection, effectively preventing breakage.

- Dry Storage: The PVDF membrane filaments produced through the composite modification process exhibit excellent chemical resistance and permanent hydrophilicity, making them easy to store, transport, and maintain.

Model Selection Recommendations:

- If the molecular weight of large organic molecules in the water being treated is between 10,000 and 30,000, the YX-UF-20K (MWCO 20,000) is preferred, as it accurately intercepts target substances.

- Membrane filaments with smaller inner/outer diameters (e.g., 0.4 / 0.6 mm) are suitable for compact equipment, provide faster water flow, and are ideal for low-contamination water. Membrane filaments with larger outer diameters (e.g., 3.5 / 5.0 mm) are more resistant to clogging and are suitable for high-turbidity water.

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