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Flat membrane element and regeneration method thereof

  • US 7,992,724 B2
  • Filed: 03/20/2009
  • Issued: 08/09/2011
  • Est. Priority Date: 01/06/2006
  • Status: Expired due to Fees
First Claim
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1. A regeneration method of a flat membrane element having an old membrane sheet lapped onto a support plate wherein a circumference of the old membrane sheet is laser deposited onto the support plate, the method comprising:

  • covering a laser deposited portion on the old membrane sheet with an embrocation having laser absorption property to protect the laser deposited portion against an external environment, the embrocation comprising a pigment;

    cutting off the old membrane sheet inside the laser deposited portion;

    lapping a new membrane sheet onto the embrocation; and

    performing a laser deposition on the new membrane sheet to regenerate the membrane element.

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