(19)

(11)

EP 0 155 960 A1

(12)

(43) Date of publication: 02.10.1985 Bulletin 1985/40 (21) Application number: 84903554.0 (22) Date of filing: 21.09.1984

(51) International Patent Classification (IPC):  C02F 3/ 28( . ) (86) International application number: PCT/GB1984/000322 (87) International publication number: WO 1985/001281 (28.03.1985 Gazette 1985/08)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 21.09.1983 GB 19830025287 (71) Applicant: BIOMASS LIMITED Cumbria (GB)	(72) Inventor: McKEOWN, Kevin, Joseph Windermere Cumbria LA7 7HB (GB)