Hollow Fiber MBR Manufacturer: PVDF Membrane Specs & Performance 2025

Top hollow fiber MBR manufacturers like Zhongsheng Environmental deliver submerged PVDF membranes with 0.1 μm pore size, flux rates of 15–30 LMH, and transmembrane pressure under 0.05 MPa. These systems achieve >99% TSS removal and operate at 2.5–3.5 Nm³/h of air scour per m², making them ideal for industrial wastewater with high fouling potential.

What Is a Hollow Fiber MBR Membrane?

A hollow fiber MBR membrane consists of thousands of porous PVDF tubes bundled into submerged modules for separating clean water from activated sludge. Each fiber is hair-like, typically 0.1 to 1.0 mm in outer diameter, and installed directly in the bioreactor where microorganisms degrade organic pollutants. Wastewater flows around the exterior of the fibers, and under slight suction (negative pressure) applied inside, permeate passes through the membrane pores while suspended solids, bacteria, and larger particles remain outside. The standard pore size is 0.1 μm, enabling near-complete removal of TSS and bacteria, producing effluent suitable for discharge or reuse. To control fouling—the buildup of solids on the membrane surface—air scouring is essential. Coarse air bubbles are introduced at the base of the module and rise along the fibers, creating a scrubbing effect that dislodges accumulated material. Effective air scouring uses optimized bubble size and frequency to prevent cake layer formation and maintain stable flux and system efficiency.

Key Performance Metrics for Hollow Fiber MBR Systems

Hollow fiber MBR performance is determined by flux rates, transmembrane pressure, and air scour intensity, which directly affect efficiency, operating costs, and membrane life. Flux rates, measured in liters per square meter per hour (LMH), usually range from 15–30 LMH for industrial applications, depending on wastewater characteristics. With highly biodegradable feedwater and strong pretreatment, flux can reach up to 40 LMH, as seen in installations using Membrane Solutions and Alfa Laval systems. Transmembrane pressure (TMP) reflects fouling levels. A well-functioning system maintains TMP below 0.05 MPa; a sustained rise above 0.06 MPa indicates significant fouling and the need for chemical cleaning. Air scour intensity, expressed in Nm³/h per m² of membrane area, prevents irreversible fouling. Optimal rates range from 2.5–3.5 Nm³/h per m², balancing cleaning effectiveness with energy use. PVDF membranes are preferred in industrial settings due to high chemical resistance, tolerating sodium hypochlorite (NaClO) concentrations up to 5,000 ppm during cleaning-in-place (CIP). Monthly chemical cleaning is typically required to sustain performance. With correct operation, pretreatment, and maintenance, hollow fiber MBR membranes last 5–7 years, meeting industrial durability standards. The following table details key technical parameters for hollow fiber MBR membranes, providing a comparative snapshot for engineering evaluation:

Parameter	Typical Range for Industrial MBR	Leading Manufacturers (e.g., Zhongsheng Environmental)	Notes
Membrane Material	PVDF (Polyvinylidene Fluoride)	Reinforced PVDF	High chemical resistance, mechanical strength
Pore Size	0.1 μm	0.1 μm	Ensures high TSS and pathogen removal
Nominal Flux Rate	15–30 LMH	18–32 LMH	Depends on wastewater characteristics, temperature
Maximum Flux Rate (Optimized)	Up to 40 LMH	Up to 42 LMH	Achievable with excellent pretreatment, low MLSS
Transmembrane Pressure (TMP)	<0.05 MPa (Normal)	<0.045 MPa (Normal)	>0.06 MPa indicates significant fouling
Air Scour Intensity	2.5–3.5 Nm³/h per m²	2.8–3.5 Nm³/h per m²	Optimized for fouling control and energy efficiency
Chemical Resistance (NaClO)	Up to 5,000 ppm	Up to 5,000 ppm	For chemical cleaning-in-place (CIP)
Expected Lifespan	5–7 years	6–8 years	With proper operation and maintenance

Hollow Fiber vs Flat Sheet MBR: Technical Comparison

System design decisions between hollow fiber and flat sheet MBR technologies influence footprint, energy use, and maintenance for industrial wastewater treatment. Hollow fiber membranes offer 20–30% higher packing density than flat sheet designs, allowing more membrane area in a smaller reactor volume. This compact configuration benefits space-constrained sites, such as those using the Zhongsheng DF series of submerged PVDF hollow fiber MBR systems. Flat sheet membranes generally consume 10–20% less energy due to lower air scour requirements. Their rigid structure and wider flow channels reduce clogging risks and allow milder aeration, as demonstrated by Alfa Laval’s LowResist™ MBR membranes. This can reduce blower energy and lower operational costs. However, hollow fiber membranes are more susceptible to clogging when treating industrial waste containing fibers, hair, or fats and greases unless effective pre-screening is in place. For example, the Zhongsheng GX series rotary screen is often used upstream to protect hollow fiber modules from debris. Flat sheet systems, with more open flow paths, tolerate challenging influents better. Maintenance differs significantly: flat sheet modules allow individual panel replacement, minimizing downtime and cost for localized damage. Hollow fiber modules usually require full cassette or bundle replacement, increasing cost and labor. In fouling recovery, hollow fiber membranes allow deeper penetration of cleaning chemicals throughout the fiber bundle. Flat sheet membranes, often built with plate-and-frame designs, respond better to physical backwashing and manual cleaning. The following table provides a direct technical comparison:

Feature	Hollow Fiber MBR	Flat Sheet MBR
Packing Density	20–30% higher	Lower
Energy Consumption (Air Scour)	Higher (2.5–3.5 Nm³/h per m²)	10–20% lower (1.5–2.5 Nm³/h per m²)
Clogging Susceptibility	Higher with fibers/grease; requires robust pretreatment	Lower susceptibility to large particles and fibers
Module Replacement	Typically entire bundle/cassette	Individual panel replacement possible
Fouling Recovery Method	Responds well to chemical cleaning	Responds well to physical backwashing and manual cleaning
Typical Applications	Municipal, light industrial, high-quality effluent needs	Industrial with high suspended solids, challenging influent, high reliability

For industrial clients evaluating a submerged PVDF hollow fiber MBR system, understanding these distinctions is crucial for selecting the optimal membrane type for their specific operational demands and wastewater characteristics. More information on module types, including the Zhongsheng DF series, can be found here: MBR Membrane Bioreactor Module DF.

Industrial Applications and System Integration

Hollow fiber MBR systems effectively treat complex industrial wastewater, delivering high-quality effluent suitable for discharge or reuse. They are commonly used in textile, food processing, and pharmaceutical industries, achieving BOD/COD removal rates above 95% and meeting strict MBR STP standards. The durability of PVDF hollow fiber membranes supports performance under variable loads and changing wastewater compositions. For real-world deployment examples, see our article on MBR Wastewater Treatment System in Vietnam: Costs, Tech & Compliance 2025. Integrating a hollow fiber MBR into an industrial treatment train requires careful planning of upstream and downstream processes. A mechanical bar screen is essential to prevent rags, plastics, and debris from damaging the hollow fibers or causing irreversible fouling. The Zhongsheng GX series rotary bar screen is a reliable solution for removing large solids before the membrane tank. More details on rotary mechanical bar screens can be found here. For industrial streams with high oil and grease content—such as from petrochemical or metalworking operations—pairing the MBR with a dissolved air flotation (DAF) system is recommended. DAF units remove emulsified oils, reducing the risk of membrane fouling. Zhongsheng Environmental provides advanced dissolved air flotation (DAF) machines designed for these conditions. Downstream disinfection is often required to meet strict discharge standards for BOD (<20 mg/L) and TSS (<10 mg/L), particularly for reuse. Chlorine dioxide (ClO₂) generators like the Zhongsheng ZS series chlorine dioxide generator or UV systems are commonly used for final polishing, ensuring regulatory compliance and public safety. For troubleshooting guidance on flux decline and fouling, refer to MBR Membrane Bioreactor Troubleshooting: 7 Data-Backed Fixes.

Frequently Asked Questions

Common questions about hollow fiber MBR systems focus on durability, compatibility, and maintenance to support long-term performance and cost efficiency. What is the lifespan of a hollow fiber MBR membrane? Typically, a hollow fiber MBR membrane has an expected lifespan of 5–7 years, provided there is proper upstream pretreatment, consistent monthly chemical cleaning-in-place (CIP), and adherence to recommended operational parameters. Can hollow fiber MBR handle high-oil wastewater? Hollow fiber MBR systems can only handle high-oil wastewater if robust upstream dissolved air flotation (DAF) or induced air flotation (IAF) pretreatment is implemented. Without it, oil and grease will irreversibly foul the membranes, leading to rapid flux decline and premature failure. How much energy does a hollow fiber MBR use? The energy consumption of a hollow fiber MBR system typically ranges from 0.8–1.2 kWh/m³ of treated water. This figure primarily depends on the intensity of air scouring required for fouling control and the desired permeate flux rate. Is PVDF better than PES for MBR membranes? For industrial wastewater treatment, PVDF (polyvinylidene fluoride) membranes generally offer superior chemical resistance, mechanical strength, and abrasion resistance compared to PES (polyethersulfone) membranes. This makes PVDF ideal for aggressive industrial effluents and demanding operating conditions. What maintenance does a hollow fiber MBR require? Key maintenance activities for a hollow fiber MBR include daily monitoring of transmembrane pressure and flux, weekly membrane integrity tests, and monthly chemical cleaning-in-place (CIP) using solutions like sodium hypochlorite (NaClO) to remove accumulated foulants.