PVDF Hollow Fiber MBR Membrane with 40 kg Tensile Strength and Under 0.1% Breakage Rate for Intensive Cleaning

In membrane bioreactors, fiber breakage is the silent killer of performance. A single broken fiber opens a shortcut for suspended solids into the permeate, contaminating the downstream process and forcing unscheduled maintenance. Zhongqiao Enlightenment engineers its PVDF hollow fiber MBR membrane specifically to eliminate this risk: every fiber delivers a tensile strength of 40 kg, and fiber breakage stays below 0.1% even under heavy backwashing and continuous aeration scouring. For plants that run aggressive cleaning cycles, high sludge concentrations, or long operational hours, this mechanical toughness translates directly into longer membrane life and lower total cost of ownership.

An MBR membrane is not a passive filter. During operation it is constantly subjected to cross-flow shear, air scouring from below, hydraulic surges during backwashing, and the pulling forces of module lifting and installation. Over months and years, weak fibers fatigue, crack at the root, or snap under tension. Once fibers break, effluent quality degrades and the entire module may need to be taken offline. Our membrane addresses each failure mode at the source: high fiber tensile strength handles pulling and lifting stresses; an embedded membrane manufacturing process creates a composite membrane whose separation layer adheres tightly to the support layer; and a membrane root protective sleeve shields the highest-stress zone of every curtain.

• 40 kg tensile strength per fiber — suitable for intensive cleaning and repeated handling without filament failure.
• Fiber breakage rate below 0.1% under heavy backwashing and aeration scouring, verified in production and field operation.
• Embedded membrane manufacturing process: the PVDF composite membrane withstands reverse pressure up to 0.3 MPa; at a backwash pressure of ≤ 0.1 MPa the membrane layer stays tightly bonded to the support layer, resisting delamination after millions of backwashing cycles.
• Membrane root protective sleeve installed on every curtain prevents filament breakage caused by water-flow fluctuations from circulation and aeration, extending fiber service life.
• Through-hole rate of membrane filaments above 98%, achieved through a three-step header cutting process — rough cutting, heating treatment, and precision cutting — ensuring every filament is functional and water path integrity is maximized.
• Double-layer sealing rubber ring provides superior sealing at the header, preventing leaks at the very point where fibers meet the manifold.

High tensile strength pays off most in installations where membranes work hardest: high-load industrial wastewater treatment, plants with high mixed liquor suspended solids (MLSS 4–13 g/L), facilities that rely on aggressive chemical cleaning with strong acids, alkalis, and oxidants, and remote or lightly staffed plants where unscheduled membrane replacement is especially costly. Typical sectors include food and beverage processing, textile and dyeing, chemical manufacturing, municipal sewage plants, and water reuse systems. The module is equally at home in containerized and packaged plants where membranes are frequently transported and installed.

Every membrane curtain carries a unique code that traces its production date, production team, and raw material supplier. If a question ever arises, Zhongqiao Enlightenment can pinpoint exactly when, where, and with what materials the curtain was made — making after-sales diagnosis fast, precise, and transparent. Combined with our 2,500 m² source factory, invention patents, and 3,000+ completed wastewater projects, this is the confidence that operators and engineering contractors look for when selecting membranes for critical infrastructure.

To get the full benefit of the membrane’s mechanical strength, follow a few simple rules during installation and start-up. Handle curtains by their frames rather than the fibers, and never drag or fold a module. Before lowering a module into the tank, check every quick-plug connector and the double-layer sealing rings. During the first days of operation, ramp the flux gradually from roughly 60–70% of design up to full rate over one to two weeks, giving the biomass time to stabilize on the membrane surface. In high-MLSS conditions (4–13 g/L), increase backwash frequency rather than aeration intensity to control fouling economically.

For backwashing, keep the pressure at or below 0.1 MPa as recommended; the embedded composite structure tolerates up to 0.3 MPa reverse pressure, which gives a generous safety margin against operator error. A typical cycle is 8–12 minutes of filtration followed by 1–2 minutes of backwash, with the exact values tuned to sludge conditions. When chemical cleaning becomes necessary, the 40 kg tensile strength allows vigorous mechanical scrubbing of the fiber surface, and the oxidation-resistant chemistry permits repeated sodium hypochlorite and acid cleaning without fiber degradation.

Every production batch passes flux, tensile strength, and membrane integrity (bubble-point) testing before shipment. The three-step header cutting process — rough cutting, heating treatment, and precision cutting — holds the filament through-hole rate above 98%, and each double-layer sealing ring is leak-tested at assembly. Every curtain receives its unique traceable code, recording production date, production team, and raw material supplier, so a single curtain can be audited from raw material to installation. This is the level of quality control behind our more than 3,000 installed projects.

Tell us your cleaning regime and sludge conditions, and we will match you with the right curtain specification — 7, 10, 15, 20, or 35 m² per piece, or a fully custom configuration.