The invention relates to a method and to a bioreactor for drying preferably biogenic residues to produce a dry mass. The method comprises the following steps: a) filling the residues (4) that have a liquid portion into a bioreactor (0) that is filled with balls (3) and has a mixer (2), and mixing the balls (3) and the residues (4) by at least temporarily operating the mixer (2) during filling and/or after filling so that films composed of the residues (4) form on the surfaces of the balls (3); b) drying the films of residues (4) to form crusts of dry mass (4.1) with a residual water content on the surfaces of the balls (3) by feeding a drying medium into the bioreactor (0), which drying medium flows around the balls (3), while at least temporarily operating the mixer (2); c) grinding and further drying the dry mass (4.1) by at least temporarily operating the mixer (2) so as to abrade pulverulent dry mass (4.2) from the balls (3); d) removing the pulverulent dry mass (4.2) from the bioreactor (0).
C02F 11/13 - Traitement des boues d'égoutDispositifs à cet effet par déshydratation, séchage ou épaississement par chauffage
B01F 27/80 - Mélangeurs à agitateurs tournant dans des récipients fixesPétrins avec des agitateurs tournant autour d'un axe sensiblement vertical
B01F 33/25 - Mélangeurs avec des éléments de mélange en vrac, p. ex. des boules en vrac dans un récipient
F26B 11/14 - Machines ou appareils à mouvement non progressif pour le séchage d'un matériau solide ou d'objets dans des tambours ou autres récipients quasi fermés, fixes, avec dispositifs agitateurs mobiles le dispositif agitateur se déplaçant dans un plan horizontal ou légèrement incliné
F26B 3/04 - Procédés de séchage d'un matériau solide ou d'objets impliquant l'utilisation de chaleur par convection, c.-à-d. la chaleur étant transférée d'une source de chaleur au matériau ou aux objets à sécher par un gaz ou par une vapeur, p. ex. l'air le gaz ou la vapeur circulant sur ou autour du matériau ou des objets à sécher
B02C 17/16 - Appareils comportant des agitateurs placés dans une cuve fixe entraînant le contenu en mouvement
2.
METHOD AND PLANT FOR SEPARATING A MAGNETIC, PHOSPHOROUS-CONTAINING COMPOUND FROM A DRY MASS BY MEANS OF DRY MAGNETIC SEPARATION
The invention relates to a method and to a plant for separating a magnetic, phosphorus-containing compound (4.3), in particular iron phosphate, from a dry mass (4.1), that is in particular composed of biogenic residues, by means of dry magnetic separation. The method comprises the following steps: a) providing the dry mass (4.1) in the form of a powder (4.2); and b) applying a magnetic field (25) to the powder (4.2) so that the magnetic, phosphorus-containing compound (4.3) is attracted by the magnetic field (25) and separated from the powder (4.2).
The invention relates to a method for stabilizing and drying a substrate, particularly biogenic waste, with a liquid content, which method comprises the following steps: filling the substrate into a bioreactor, completely mixing the substrate, evaporating the liquid from the substrate, supplying ambient air into the bioreactor, topping up fresh substrate into the bioreactor in a volume that at least compensates for the volume of evaporated liquid, and repeating the steps, until an adequate quantity of dried substrate is obtained and discharged from the bioreactor, wherein the fresh substrate is topped up at intervals and the substrate contained in the bioreactor is completely mixed at least once during said interval. The invention also relates to a bioreactor for use in this method.
The invention relates to an apparatus and to a method for if separating suspensions for covering sludge, in particular sewage sludge. The apparatus comprises a sedimentation basin (10), into which aqueous suspension provided with solid material particles can be supplied via a feed line (13), and from which thickened sludge (8) can be discharged from the first chamber (10.1) of the sedimentation basin (10) via a first drain line (7). The apparatus is characterized by a surface filter (11, 17) which can be immersed in the suspension and which comprises at least one outer perforated plate (11.1, 17.1), an inner perforated plate (11.2, 17.2) arranged at a distance therefrom, and a filter material (11.3, 17.3) inserted between the two perforated plates (11.1, 11.2; 17.1, 17.2), and also a pump (9) which faces the inner perforated plate (11.2, 17.2) and which cooperates with a second drain line (14), via which filtrate (3) can be discharged from the second chamber (10.2) of the sedimentation basin(10).
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