Patent ID: 8968568
Filing Date: 2015-03-03
Classification: B01D,C02F,H04N

Abstract:
1. A process for testing a tubular capillary membrane water filtration system including at least two separate capillary membrane filter housings having tubular capillary membranes fitted therein, said capillary membranes being permanently hydrophilic and having an asymmetric pore structure thereby allowing the passage of water in either a forward or backward direction across the membrane and not allowing the passage of air in a backward direction across the membrane, comprising: reversing the water flow, by forcing air backwards through said capillary membrane filter housing until all of the water is pushed backward through the membrane causing the filter to lock up until a desired constant pressure is achieved and held within said filter housing; monitoring said pressure as a function of time; and determining if a drop in said pressure is experienced; whereby said drop in pressure is indicative of a loss of membrane integrity.