Patent Number: 6,967,085

Title: Flocculation of cell material

Abstract: A process of flocculating microbial cell material from a suspending medium which contains cell material, comprising adding to the suspending medium a first polymeric material which is cationic and has intrinsic viscosity of not more than 2 dl/g, and subsequently or simultaneously adding to the suspending medium a second polymeric material which is cationic or substantially non-ionic and has intrinsic viscosity of at least 4 dl/g, and allowing the cell material to flocculate.

Inventors: Hughes; Jonathan (Brighouse, GB), Weir; Steven (Huddersfield, GB), Moran; Paul (Ilkley, GB)

Assignee: Ciba Specialty Chemicals Water Treatments Ltd.

International Classification: C12N 1/02 (20060101); C12Q 001/02 (); C12N 011/02 (); C12N 011/08 (); C12N 001/02 ()

Expiration Date: 1/22/02018