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Logarithm reduction values (LRV) for filtration of ΦX174 bacteriophages in SWW through nanocellulose filter papers of thicknesses a) 9 µm and b) 29 µm at overhead pressures 1 and 3 bar. Arrows indicate that obtained values are below the limit of detection (LOD) in the plaque‐forming unit (PFU) assay, and no phage particles were detected in large volume plating. The results are the average of three measurements.
