Patent No. EP3486650 (titled "Method For Determining The Effectiveness Of Removal Of Viruses In A Purification Process.") was filed by KWR Water on Nov 15, 2018. The application was issued on Mar 12, 2025.
A method for evaluating the effectiveness of membrane filtration processes in water treatment by using naturally occurring viruses as indicators. The method involves isolating and quantifying viruses present in the water sample before and after membrane filtration, then determining the log reduction in virus concentrations. This approach eliminates the need for external markers or dosing, allowing direct measurement of virus removal through the inherent viral load. The method can achieve log reductions of 4 or more, enabling the detection of membrane integrity and virus removal through the presence of naturally occurring viral particles.

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