| http://www.w3.org/ns/prov#value | - According to one aspect, the present invention provides a method of cleaning a membrane filtration module, said module including one or more membranes located in a feed-containing vessel and extending longitudinally between vertically spaced upper and lower headers into which the ends of the membranes are potted, the membranes having a permeable wall which is subjected to a filtration operation wh
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