(19)

(11)

EP 1 812 135 A2

(12)

(88) Date of publication A3: 12.10.2006 (43) Date of publication: 01.08.2007 Bulletin 2007/31 (21) Application number: 05803555.1 (22) Date of filing: 15.11.2005

(51) International Patent Classification (IPC):  B01D 35/147(2006.01) (86) International application number: PCT/GB2005/004398 (87) International publication number: WO 2006/051336 (18.05.2006 Gazette 2006/20)

(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: 15.11.2004 GB 0425199 (71) Applicant: Evolution Aqua Limited Wigan, Lancashire WN5 0LP (GB)	(72) Inventors: JACKSON, Nicholas, Evolution Aqua Limited Lancashire WN5 0LP (GB) CLARK, Andrew Buckinghamshire MK18 2LD (GB) FRENCH, Colin, Evolution Aqua Limited Lancashire WN5 0LP (GB) (74) Representative: Thompson, Trevor George  Thompson Gray LLP Sussex Innovation Centre Science Park Square Falmer Brighton BN1 9SB Falmer Brighton BN1 9SB (GB)