公开(公告)号：DE59305523D1

公开(公告)日：1997-04-03

申请号：DE59305523

申请日：1993-09-02

Applicant: BASF AG

Inventor： GEIGER THOMAS ,  ROEMER RAINER DR ,  SEIFERT HELMUT DR ,  TRAEGNER-DUEHR ULRICH DR ,  BROECKEL ULRICH DR ,  MEYER JOACHIM DR ,  GRIEBEL AXEL

IPC: B09B1/00 ,  B09B3/00 ,  C02F11/06 ,  C02F11/10 ,  C02F11/12

Abstract: Method for the utilisation of plastic wastes, which arise in the production, further processing or after use of the plastic, in that the plastic wastes, in a sewage treatment plant, are a) comminuted, then mixed with a sewage sludge to which organic flocculants are added and to which, if required, further amounts of finely divided charcoals and/or ashes are added, b) the plastic, if required, is modified in its surface properties by binders in such a way that it is better bound into the sludge, c) this pretreated sludge mixture is subjected to filtration, in which case the plastic can assume the properties of a filter aid, i.e. the reduction of the filter residue, d) the filter cakes obtained are burnt, in which case the plastic assumes the function of an additional energy source and e) the ash is deposited, for example, in a sanitary landfill or supplied for utilisation or a) comminuted if required b) and then mixed inside or outside a combustion furnace with a mixture, which has previously been subjected to filtration, of sewage sludge, organic flocculant and, if required, further amounts of finely divided charcoals and/or ashes, c) filtered again if required, d) the resulting mixture is burnt and e) the ash is deposited, for example, in a sanitary landfill or supplied for utilisation.

公开(公告)号：AT149150T

公开(公告)日：1997-03-15

申请号：AT93114034

申请日：1993-09-02

Applicant: BASF AG

Inventor： GEIGER THOMAS ,  ROEMER RAINER DR ,  SEIFERT HELMUT DR ,  TRAEGNER-DUEHR ULRICH DR ,  BROECKEL ULRICH DR ,  MEYER JOACHIM DR ,  GRIEBEL AXEL

IPC: B09B1/00 ,  B09B3/00 ,  C02F11/06 ,  C02F11/10 ,  C02F11/12

Abstract: Method for the utilisation of plastic wastes, which arise in the production, further processing or after use of the plastic, in that the plastic wastes, in a sewage treatment plant, are a) comminuted, then mixed with a sewage sludge to which organic flocculants are added and to which, if required, further amounts of finely divided charcoals and/or ashes are added, b) the plastic, if required, is modified in its surface properties by binders in such a way that it is better bound into the sludge, c) this pretreated sludge mixture is subjected to filtration, in which case the plastic can assume the properties of a filter aid, i.e. the reduction of the filter residue, d) the filter cakes obtained are burnt, in which case the plastic assumes the function of an additional energy source and e) the ash is deposited, for example, in a sanitary landfill or supplied for utilisation or a) comminuted if required b) and then mixed inside or outside a combustion furnace with a mixture, which has previously been subjected to filtration, of sewage sludge, organic flocculant and, if required, further amounts of finely divided charcoals and/or ashes, c) filtered again if required, d) the resulting mixture is burnt and e) the ash is deposited, for example, in a sanitary landfill or supplied for utilisation.

公开(公告)号：DE4423143A1

公开(公告)日：1996-01-04

申请号：DE4423143

申请日：1994-07-01

Applicant: BASF AG

Inventor： BROECKEL ULRICH DR ,  MEYER JOACHIM DR ,  ROEMER RAINER DR ,  SCHUBERT ERICH DIPL ING ,  BLEI PETER DIPL ING ,  FESLER JUERGEN DIPL ING ,  GRIEBEL AXEL ,  WITT REINER

IPC: C02F11/12 ,  C02F11/14 ,  B01F9/02 ,  B01F15/02 ,  B01F15/04 ,  B01D37/00

Abstract: Filtration and dewatering process is as follows. Sludge (1) is opt. mixed with additives such as coal or ash (2) in a contact device (3). The sludge and additives (1,2) are sent by a pump (4) along a line (5) to a cylindrical stirrer (7) with a rotating cylinders (7a,7b,7c) along the length of the cylinder, where the cylinders have changing dia. (pref. with the dia. changing in steps). A flocculating agent such as an organic polymer is supplied at an inlet (6). Rotational energy input sets up shear force gradients, promoting intensive mixing in the first section (7a), flock formation in the second (7b), and mechanical stabilisation of the flocks, in the third (7c). The flocculated mixt. is sent by a line (8) to the filter press (9). Also claimed is a cylinder stirrer as described above for stirring, mixing, agglomerating or flocculating two or more components, such as sludge.