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Membrane module protection

  • US 9,764,288 B2
  • Filed: 03/15/2013
  • Issued: 09/19/2017
  • Est. Priority Date: 04/04/2007
  • Status: Active Grant
First Claim
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1. A filtration system comprising:

  • A membrane module comprising;

    An upper header;

    A lower header;

    A plurality of hollow fiber membranes having upper ends potted in the upper header and lower ends potted in the lower header;

    A liquid permeable cage at least partially surrounding the plurality of hollow fiber membranes; and

    A liquid permeable screen in contact with and surrounding the cage;

    An aeration cap coupled to the lower header of the membrane module;

    A non-return valve in fluid communication with the aeration cap, the non-return valve configured to provide for flow of waste out of the module and to prevent any feed liquid from entering an area between the screen and the membranes; and

    Wherein the membrane module includes a groove positioned at an upper end of the membrane module below the upper header, the screen being positioned below the groove and secured by a fastener, the groove and the fastener configured to prevent upward vertical movement of the screen.

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