0.22 micron filtration

filtration why we are doing for final

In water smallest bacteria having size 0.2 micron so we use 0.2 micron filter i.e. Psedomonus demonata.


Why we use 0.45micron filter for microbiological analysis of water?

May be 0.45 micron filter act as prefilter, then 0.2 micron filter used

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