(19)

(11)

EP 2 558 189 A1

(12)

(43) Date of publication: 20.02.2013 Bulletin 2013/08 (21) Application number: 11769190.7 (22) Date of filing: 18.04.2011

(51) International Patent Classification (IPC):  B01F 3/04(2006.01) C02F 1/74(2006.01) B01D 19/00(2006.01) C02F 7/00(2006.01) (86) International application number: PCT/SG2011/000153 (87) International publication number: WO 2011/129775 (20.10.2011 Gazette 2011/42)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 16.04.2010 US 324800 P (71) Applicant: National University of Singapore Singapore 119077 (SG)	(72) Inventors: NG, Kim, Choon Singapore 119077 (SG) PATTATHIL, Madhav, Menon Singapore 680761 (SG) SATHTHASIVAM, Jayaprakash Singapore 119077 (SG) (74) Representative: Talbot-Ponsonby, Daniel Frederick  Marks & Clerk LLP Fletcher House Heatley Road The Oxford Science Park Oxford OX4 4GE Oxford OX4 4GE (GB)