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Traditionally, PFAS filtration has only been possible with the use of carbon block, resins or distillation, which limits design flexibility and more important filtration efficiency. Our PFAS filter media is engineered to deliver exceptional performance in water filtration systems, with a pleated or wrapped filter design, combining four layers of innovation in one self-supported structure. Additionally, we provide meltblown liquid filter media, membrane spacers, rigid tubes & cores, and protective sleeves.
Our new PFAS Filter Media is built around a self‑supported, four‑layer composite structure that integrates functional nonwoven materials with activated carbon into one engineered media. Each layer plays a distinct role, working together to maximize PFAS removal while protecting performance and extending service life.
The development of this new PFAS filter media was guided by a clear objective: to bridge the gap between high‑performance PFAS removal and flexible filter design. By bringing PFAS removal into pleated and wrapped filter formats, the media combines the structural and efficiency advantages of modern filters with specialized PFAS adsorption.
With a PFAS filtration efficiency range from 70 up to 99% we engineer the filter media from standard filtration needs to highest efficiency. As each layer is designed separately, the approach allows the media to be customized to individual requirements, supporting a wide range of water filtration applications where PFAS reduction is required alongside particulate removal and system protection.
Our media integrates three complementary filtration mechanisms to maximize PFAS removal and protect downstream systems:
This complementary approach allows the PFAS Filter Media to deliver high PFAS removal efficiency while improving media utilization, extending service life, and lowering total system cost. At the same time, it protects downstream carbon and ion‑exchange resins, enabling overall filtration systems to perform more efficiently and reliably.
Due to the self-supported structure of our PFAS filter media it can be used as a pre-filter within PFAS water filtration systems without additional pleat support needed. The pleated design offers maximum media surface for an effective upstream filtration.
Used as a pre‑filter to lower PFAS levels, our media protects downstream carbon and ion‑exchange resins, enabling them to work more efficiently and last longer:
The meltblown layer captures other impurities, leaving maximum carbon surface area dedicated to PFAS removal. This prevents early carbon and resin blinding in downstream filtration layers, preserving carbon surface area for PFAS, while achieving the same PFAS performance with less carbon.
By installing a pre-filter made from our PFAS filter medium, we can extend the filter lifetime of the downstream PFAS filter systems by up to 40%, which also means fewer filter change-outs are required.
As regulatory pressure increases and system efficiency becomes more critical, PFAS pre‑filtration will play an increasingly important role - not only in reducing PFAS, but in protecting investment‑intensive downstream treatment technologies.
Delpore™ is a fully synthetic meltblown nonwoven filter media engineered for demanding liquid filtration applications, including systems designed to address PFAS filtration. Its fine-fiber meltblown structure with uniform pore distribution supports reliable, reproducible filtration performance and makes the material suitable for use in PFAS‑critical filtration stages.
Within PFAS‑relevant filtration concepts, Delpore™ can be used as a functional filtration layer within multi‑stage or composite filter systems. Fine fiber structure enables filtration as small as 1 µm. The meltblown microfiber matrix provides high particle retention efficiency with consistent pore size distribution across the entire media. Compared to many standard filter materials, Delpore™ offers significantly finer filtration, contributing to improved removal of microscopic contaminants that may carry or accompany PFAS in liquid streams.
The depth filtration structure of Delpore™ allows the media to capture and retain large amounts of particulate matter without rapid pressure increase. This contributes to longer filter run times, reduced risk of premature clogging, and fewer filter change-outs under stable operating conditions.The material maintains structural integrity in wet environments and supports predictable filtration behavior, contributing to system reliability, reduced maintenance frequency, and lower total operating costs.
Conwed™ extruded rigid cages and cores are engineered to provide mechanical support, containment, and separation in liquid filtration systems designed for PFAS‑relevant applications. They deliver the structural strength and rigidity required to stabilize delicate filter media and maintain defined geometry under operating conditions.
The cages and cores offer consistent dimensions and reliable mechanical performance. Their rigid structure helps prevent media deformation, collapse, or abrasion, supporting predictable flow paths and stable filtration behavior. By protecting filter media and preserving structural integrity, they contribute to extended filter service life, improved handling during assembly, and reliable long-term operation in demanding liquid filtration environments.
Conwed™ rigid tubes and Coretec™ cores can be tailored to specific system requirements in terms of diameter, wall thickness, and open area, enabling integration into pleated, wrapped, or cartridge-style filter designs.
Naltex™ extruded netting sleeves provide a lightweight, corrosion-proof outer protection for PFAS filter elements. These durable plastic wraps shield delicate pleated media from damage during handling and operation, while their open mesh design maintains even flow distribution and prevents pleat collapse under pressure. Made from high-performance polymers, Naltex sleeves offer broad chemical resistance and are fully incinerable, ensuring easy, metal-free disposal of used PFAS filters.
PFAS (per‑ and polyfluoroalkyl substances) are a large group of synthetic chemicals used in many industrial and consumer applications. Due to their extreme chemical stability, they do not readily break down in the environment. As a result, regulatory authorities worldwide are introducing increasingly strict limit values for PFAS in water, driving the need for reliable and scalable filtration technologies.
PFAS are extremely persistent because their carbon‑fluorine bonds are among the strongest in chemistry. This makes them resistant to natural degradation, allowing them to accumulate in water, soil, and living organisms over time.
PFAS molecules are typically small, highly mobile, and chemically stable. Unlike particles or microorganisms, they cannot be removed by mechanical filtration alone. Effective PFAS removal requires targeted chemical interactions, making filter media design significantly more complex.
Standard filters are designed primarily for particle removal (size exclusion). PFAS molecules are much smaller than typical filter cut‑offs and pass through unhindered.
Even adsorption‑based technologies can lose efficiency when carbon or resin surfaces are occupied by competing contaminants, sediments, or organic matter.
PFAS removal has traditionally relied on activated carbon, ion‑exchange resins, or distillation processes. While effective, these approaches often limit filter design, require significant material usage, and can result in high operating costs.
PFAS filter media must:
Activated carbon and ion‑exchange resins are high‑value adsorption materials. When exposed to particles, sediments, or competing contaminants, they lose effective adsorption capacity faster. The early clogging of the open pore structure shortens performance lifetime, reduces performance consistency, and increases total cost of ownership as more activated carbon and resin used. Protecting these surfaces is critical for maintaining PFAS removal efficiency and extending service life.
Filter design plays a critical role in PFAS filtration because it directly affects surface area, pressure drop, service life, and the predictable performance required to meet regulatory limits. Wrapped and pleated filter designs each serve different application needs.
Wrapped filter designs are typically used when high mechanical robustness and simplicity are required. The filter media is wound around a core, creating a stable cylindrical structure that can accommodate higher contaminant loads and thicker adsorption zones. These designs are well suited for moderate flow rates and demanding hydraulic conditions, but they generally offer lower surface area per volume and require more adsorption material, which can increase cost and system size.
Pleated filter designs, on the other hand, maximize surface area by folding the media into pleats. This allows for higher flow rates, lower pressure drop, and more compact filter elements. Pleated filters enable efficient PFAS removal with optimized carbon usage, defined geometry, and stable long‑term performance. From a regulatory perspective, pleated designs support consistent efficiency over time, which is essential for meeting increasingly strict PFAS limits.
Traditionally, PFAS removal has been limited to final treatment stages using carbon blocks, resins, or distillation. Despite their structural advantages and large surface area pleated filters were not used in — were not able to contribute to PFAS…
Removing PFAS from water remains one of the most complex challenges in filtration technology. These persistent compounds require not only high adsorption performance, but also protection of active media surfaces from fouling and premature saturation.…
GESSNER introduces a new multilayer PFAS filter media designed to address one of the most demanding challenges in water treatment: efficient PFAS removal combined with flexible, modern filter design.
