Filteration Sterilization Method: - In bacteriological laboratary, it is occasionally neccessary to sterilize media or solutions, which would be broken down by heat. This is accomplished by the use of specially constructed filters which have small pores enough to hold back bacteria which allowing most or all of the other components of the solution to pass through.
Filters used in water purification or filtering procedures remove most of the bacteria but donot in the true sense produce sterile water.
Example: - Take a conical flask and funnel, and fixed the funel in conical flask. Put the filter paper on the funel and place the solution on the filter paper. Solution pass through the filter paper and microbes are retain on the paper.
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