Filtration method

Details Filtration method Filtration method

Category

B - Operations, Transporting

Subcategory

01

Subsubcategory

D

IPC codes

B01D 37/00 (2006.01) B01D 61/14 (2006.01) B01D 61/22 (2006.01) C12H 1/07 (2006.01) C12M 1/12 (2006.01)

Type

Patent

Patent number

CA 2123730

Description

The present invention provides a method of filtering a fluid comprising (a) passing a first portion of a contaminated fluid through a filtration system comprising a first filtration medium of a preselected surface area which removes contaminants from the first portion of the fluid, (b) simultaneously passing a second portion of the contaminated fluid through a monitoring system comprising a second filtration medium of a preselected surface area which removes contaminants from the second portion of the fluid, wherein the first and second filtration media are the same except that the surface area of the first filtration medium is greater than the surface area of the second filtration medium, and wherein the rate at which the second portion of the contaminated fluid passes through the second filtration medium per unit of surface area of the filtration medium is greater than the rate at which the first portion of the contaminated fluid passes through the first filtration medium per unit of surface area of the filtration medium, (c) determining the quantity of fluid passed through the second filtration medium per unit of surface area of the second filtration medium from the commencement of fluid flow therethrough until an increase in pressure drop is observed across the second filtration medium, and (d) terminating the passage of the first portion of the contaminated fluid through the first filtration medium before the quantity of fluid passed therethrough per unit of surface area of the first filtration medium exceeds the quantity of fluid passed through the second filtration medium per unit of surface area of the second filtration medium resulting in an increased pressure drop.

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