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EP 2 027 072 A1

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(43) Date of publication: 25.02.2009 Bulletin 2009/09 (21) Application number: 07777206.9 (22) Date of filing: 22.05.2007

(51) International Patent Classification (IPC):  C02F 1/469(2006.01) A01G 25/00(2006.01) B01D 61/44(2006.01) (86) International application number: PCT/US2007/012145 (87) International publication number: WO 2007/145785 (21.12.2007 Gazette 2007/51)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK RS (30) Priority: 13.06.2006 US 804610 P 22.06.2006 US 805512 P 20.09.2006 US 524033 20.09.2006 US 524078 (71) Applicant: Siemens Water Technologies Corp. Warrendale, PA 15086 (US)	(72) Inventors: GANZI, Gary C. Lexington, Massachusetts 02421 (US) FREYDINA, Evgeniya Acton, Massachusetts 01720 (US) JHA, Anil D. San Francisco, CA 94129 (US) LIANG, Li-Shiang Harvard, Massachusetts 01451 (US) WILKINS, Frederick C. Pepperell, Massachusetts 01463 (US) (74) Representative: Hazzard, Alan David  Siemens Aktiengesellschaft Postfach 22 16 34 80506 Munich 80506 Munich (DE)