A FILTERING DEVICE AND A METHOD FOR REMOVING CONTAMINANTS FROM A CONTAMINATED FLUID

Patentradars sammanfattning

BioSorb AB's invention is a filtering device comprising at least one cellulose-based filtering material—cellulose fibers modified with an adsorbed positively charged polyelectrolyte (preferably polyvinylamine, PVAm)—arranged in series with at least one adsorbing-agent filter (preferably activated carbon or carbon black), housed in one or more configurable filter housings. The cellulose-PVAm stage preferentially captures long-chain PFAS, hydrocarbons, and negatively charged species (including bacteria/viruses) via electrostatic and hydrophobic interactions, while the activated carbon stage removes short- to medium-chain PFAS, heavy metals, chlorine/chlorine dioxide, and drug residues. An optional downstream polishing filter traps any residual adsorbent particles, and the modular design allows series/parallel scaling, selective replacement of spent stages, and integration of pre/post-treatment units such as ion-exchange resins and pH-balancing filters.

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