公开(公告)号：DE3063662D1

公开(公告)日：1983-07-14

申请号：DE3063662

申请日：1980-05-05

Applicant: BASF AG

Inventor： SANDER BRUNO DR ,  HESS KLAUS DR ,  LINTZ PETER ,  GOESELE WALTER 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.