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EHEDG Guidelines
During the past 30 years, EHEDG subject matter specialists have collaborated in EHEDG Working Groups to develop 50+ documents for food processing buildings, food production environments, and a wide range of food processing equipment types.
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Doc. 19 A method for assessing the bacterial impermeability of hydrophobic membrane filters
Second Edition, June 2012 - Research has shown that hydrophobic membrane filters, with a pore size of 0.22 mm, do not retain micro-organisms under all process conditions. Investigations were conducted in risk assessment of sterilising hydrophobic membrane filters, evaluating the performance of the filters under a range of operating conditions. To validate the bacterial retention ability of sterilising grade hydrophobic membrane filters, a bacterial aerosol challenge test methodology was developed.
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