NanoPak Electropositive Biological Water Filter

NanoPak employs electro-adsorptive filtration using nanoalumina (boehmite, AlOOH) fibers that carry a strong positive charge, attracting contaminants that are mostly negatively charged—like bacteria, viruses, and submicron particles. It offers both electroadhesion and mechanical depth filtration in one.

Key Features:

  • Electro-adsorptive media: Captures ultra-fine and charged contaminants effectively

  • Nanoalumina fibers: High surface area with functional tunability via electrical potential

  • Hybrid filtration: Dual-mode removal—electroadhesion + mechanical depth filtration

  • High efficacy: Exceptional virus and bacteria removal; also handles cysts & chemical toxins

  • High capacity & low resistance: Large adsorption capacity with smooth flow, even at high filter loading

  • High Flow variant: Ideal for pretreatment and protecting ultra-fine downstream filters

  • Versatile application: Usable across consumer, commercial, medical, and wastewater industries

  • Modular enhancement: Can integrate PAC or metal-targeting additives for specialized use

  • Safe materials & design: Non-toxic, sustainable base materials with no harmful residues

Core Filtration Mechanis

  • The nanoalumina fibers (~2 nm diameter, 200–300 nm length) are densely packed, creating a charge field that extends about 1 μm from the fiber. This structure enables high-efficiency adsorption and filtration of fine particulates.

  • Media design allows controlling the electrical potential (from –32 mV to +32 mV) via fiber packing—tuning performance depending on contaminant type.

  • It’s a hybrid filter: combines electro-adsorptive action with depth filtration for superior capture of submicron contaminants.

Flow Dynamics & Configuration

  • Offers a high flow rate and low pressure drop, outperforming many traditional depth filters, thanks to its engineered structure.

  • A "High Flow" variant—with larger pore volume—serves as an effective prefilter for turbid water, helping to protect finer-grade downstream filters and membranes.