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What is the pore size in ultra-filtration?

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in Food Processing Unit Operations by (110k points)
What is the pore size in ultra-filtration?

(a) Around 0.1 micron

(b) Around 0.01 micron

(c) Around 0.001 micron

(d) Around 0.0001 micron

The question was asked during a job interview.

Origin of the question is Filtering Medium Resistance in chapter Filtration of Food Processing Unit Operations

1 Answer

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Best answer
Right choice is (b) Around 0.01 micron

Explanation: An ultrafiltration filter has a pore size around 0.01 microns. Ultrafiltration would remove larger particles and also remove some viruses. It is a membrane filtration process where hydrostatic pressure forces a liquid against a semi permeable membrane.

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