公开(公告)号：DE2920350A1

公开(公告)日：1980-11-20

申请号：DE2920350

申请日：1979-05-19

Applicant: BASF AG

Inventor： SANDER BRUNO DIPL CHEM DR ,  HESS KLAUS DIPL ING DR ,  LINTZ PETER ING GRAD ,  GOESELE WALTER DIPL ING DR

IPC: B01D25/00 ,  B01D37/00 ,  B01D37/03 ,  C02F11/12

Abstract: A process for dewatering sewage sludges, the dewatering characteristics of which have been improved by adding an organic flocculant, on a chamber filter press, wherein the greater part of the water in the flocculated sludges is removed by gravity filtration in a process step upstream of the chamber filter press, without application of a pressure difference, and the actual pressure filtration, on the chamber filter press, is only then carried out. In principle, commercial products can be used as the organic flocculant. These are water-soluble, macromolecular compounds which have been obtained by polymerization or copolymerization of acrylamide, acrylic cid and/or their salts, or of esters of acrylic acid or methacrylic acid with specifically modified alcohol components.

公开(公告)号：DE2641818A1

公开(公告)日：1978-03-23

申请号：DE2641818

申请日：1976-09-17

Applicant: BASF AG

Inventor： GOESELE WALTER DIPL ING DR

IPC: B04B11/04 ,  B04B11/06

Abstract: A slurry distributor located within the bowl of a centrifuge rotates in the same direction as the centrifuge and at a higher speed. Used for feeding slurry to a filtering centrifuge operating on a batch cycle. Uniform distribution of the slurry over the centrifuge basket is assured with no risk of basket out-of-balance; The uniform cake thus produced is easily and uniformly washed.