Amiad signs supply agreement with Calgon Carbon Corp. Amiad, a global producer of water treatment and filtration solutions, announces that it has signed a long-term supply agreement with Calgon Carbon Corporation (“Calgon Carbon”) to provide its Arkal automatic self-cleaning disc filtration technology for incorporation within Calgon Carbon’s Hyde GUARDIAN® Ballast Water Treatment Systems. The agreement was signed through the Company’s wholly-owned subsidiary, Amiad USA, Inc., and with Hyde Marine, Inc., a subsidiary of Calgon Carbon. “This agreement will ensure we have a guaranteed supply of pre-treatment water filtration systems which, we believe, are technically superior to other systems currently used to treat ballast water,” said James A.