(19)

(11)

EP 1 776 319 A1

(12)

(43) Date of publication: 25.04.2007 Bulletin 2007/17 (21) Application number: 05761308.5 (22) Date of filing: 13.07.2005

(51) International Patent Classification (IPC):  C02F 1/44(2006.01) (86) International application number: PCT/SG2005/000233 (87) International publication number: WO 2006/006942 (19.01.2006 Gazette 2006/03)

(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 NL PL PT RO SE SI SK TR (30) Priority: 14.07.2004 SG 200404298 (71) Applicant: Tritech Water Technologies Pte Ltd. Singapore 415978 (SG)	(72) Inventors: WANG, Xiaoning Singapore 760352 (SG) ONG, Soon Leong Singapore 509436 (SG) CAI, Jungang Singapore 650358 (SG) (74) Representative: Jeck, Anton et al Jeck - Fleck - Hermann Klingengasse 2/1 71657 Vaihingen/Enz 71657 Vaihingen/Enz (DE)