Abstract

The invention relates to a method and a bioreactor for drying biogenic residues to a dry mass comprising filling the residues into a bioreactor filled with spheres and mixing the spheres and the residues so that films of the residues form on the surfaces of the spheres, drying the films of residues with the formation of crusts of dry mass with a residual water content on the surfaces of the spheres by feeding a drying medium into the bioreactor, The invention relates to a method and a bioreactor for drying biogenic residues to a dry mass comprising filling the residues into a bioreactor filled with spheres and mixing the spheres and the residues so that films of the residues form on the surfaces of the spheres, drying the films of residues with the formation of crusts of dry mass with a residual water content on the surfaces of the spheres by feeding a drying medium into the bioreactor, grinding and further drying the dry mass by mixing and grinding off powdery dry mass from the spheres.

IPC Classes  ?

• C02F 11/13 - Treatment of sludgeDevices therefor by de-watering, drying or thickening by heating
• B01F 27/92 - Mixers with rotary stirring devices in fixed receptaclesKneaders with stirrers rotating about a substantially vertical axis with helices or screws
• B01F 35/90 - Heating or cooling systems
• B01F 35/91 - Heating or cooling systems using gas or liquid injected into the material, e.g. using liquefied carbon dioxide or steam
• B01F 101/00 - Mixing characterised by the nature of the mixed materials or by the application field
• F26B 3/04 - Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour circulating over, or surrounding, the materials or objects to be dried
• F26B 11/14 - Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices the stirring device moving in a horizontal or slightly-inclined plane

Abstract

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).

IPC Classes  ?

• C02F 11/13 - Treatment of sludgeDevices therefor by de-watering, drying or thickening by heating
• B01F 27/80 - Mixers with rotary stirring devices in fixed receptaclesKneaders with stirrers rotating about a substantially vertical axis
• B01F 33/25 - Mixers with loose mixing elements, e.g. loose balls in a receptacle
• F26B 11/14 - Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices the stirring device moving in a horizontal or slightly-inclined plane
• F26B 3/04 - Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour circulating over, or surrounding, the materials or objects to be dried
• B02C 17/16 - Mills in which a fixed container houses stirring means tumbling the charge

Abstract

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).

IPC Classes  ?

• C02F 11/13 - Treatment of sludgeDevices therefor by de-watering, drying or thickening by heating
• B01F 27/80 - Mixers with rotary stirring devices in fixed receptaclesKneaders with stirrers rotating about a substantially vertical axis
• B01F 33/25 - Mixers with loose mixing elements, e.g. loose balls in a receptacle
• B02C 17/16 - Mills in which a fixed container houses stirring means tumbling the charge
• F26B 3/04 - Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour circulating over, or surrounding, the materials or objects to be dried
• F26B 11/14 - Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices the stirring device moving in a horizontal or slightly-inclined plane

Abstract

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).

IPC Classes  ?

• B03C 1/005 - Pretreatment specially adapted for magnetic separation
• B03C 1/033 - Component partsAuxiliary operations characterised by the magnetic circuit
• B03C 1/26 - Magnetic separation acting directly on the substance being separated with free falling material
• B03C 1/30 - Combinations with other devices, not otherwise provided for

Abstract

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.

IPC Classes  ?

• C05F 17/00 - Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
• C05F 17/10 - Addition or removal of substances other than water or air to or from the material during the treatment
• C05F 17/964 - Constructional parts, e.g. floors, covers or doors

Abstract

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).

IPC Classes  ?

• C02F 11/121 - Treatment of sludgeDevices therefor by de-watering, drying or thickening by mechanical de-watering
• C02F 1/28 - Treatment of water, waste water, or sewage by sorption