Membrane Treatment

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  • HARN R/O Systems, Inc.

    HARN R/O Systems, Inc.

    The oldest, privately-owned company in the membrane treatment industry. Since 1972 owners have turned to Harn to deliver the highest quality membrane ...

  • Separation Processes, Inc. (SPI)

    Separation Processes, Inc. (SPI)

    Since 1980, SPI has become an internationally recognized consulting engineering firm focused on the application of membrane technology and other ...