Apparatus (1) for the aerobic microbiological heating of free-flowing moist organic solids for carrying out a process for the aerobic microbiological heating of free-flowing moist organic solids, preferably of partially dewatered
slurry, comprising the steps: - Loading the
solid into a drum (2), - Rotating the drum (2) about a
rotational axis (3) and simultaneously conveying the
solid material in the drum (2), and - Introducing
oxygen, in particular
atmospheric oxygen, into the
solid via at least one perforated tube (15), wherein the at least one perforated tube (15) extends in the drum (2) and rotates with the drum (2), - wherein with each revolution of the drum (2) at least one perforated tube (15) is immersed in the solid and transported back out of the solid, - wherein at least one perforated tube (15) is blown into and the air is extracted from the drum (2), and - wherein by means of a control device (35) the amount of air blown in and / or the amount of air extracted is changed depending on the rotational position of the drum (2) and / or the pressure in the drum (2) and / or the amount of air conveyed, the device comprises: - the rotatably arranged drum (2), wherein the drum (2) has a
rotational axis (3), - a feed device (8) on the drum (2) for feeding the
solid material, - a
discharge device (9) on the drum (2) for discharging the
solid material, - a first fan (12) for extracting air from the drum (2) and at least a second fan (24) for blowing air into the at least one perforated tube (15), - the at least one perforated tube (15) for introducing
oxygen, in particular
atmospheric oxygen, into the solid, wherein the at least one perforated tube (15) extends in the drum (2) and is rotationally fixed to the drum (2), wherein the at least one perforated tube (15) is arranged eccentrically in the drum (2), i.e. at a distance from the axis of rotation (3), - an air inlet (22) on a fixed end face of the drum (2), and - the control device (35) for changing the amount of air blown in and / or the amount of air extracted depending on the rotational position of the drum (2) and / or the pressure in the drum (2) and / or the amount of air conveyed, comprising a rotary
coupling (21) for connecting the supply air connection (22) to the at least one perforated
pipe (15), wherein the rotary
coupling (21) comprises: ◯ a first
pipe section (36) opening into the at least one perforated
pipe (15) and rotating with the at least one perforated pipe (15), with a lateral first opening (47), and ◯ a fixed second pipe section (42) surrounding the first pipe section (36) with a lateral second opening (48), ◯ wherein the second pipe section (42) is connected to the fixed end face of the drum (2), ◯ wherein the air supply connection (22) opens from the outside to the second opening (48), and ◯ wherein the first opening (47) and the second opening (48) are arranged such that when the at least one perforated tube (15) is at the bottom, i.e. in the solid, the two openings (47, 48) completely overlap, and when the at least one perforated tube (15) is conveyed out of the solid, the overlap of the two openings (47, 48) decreases to a minimal overlap or no overlap, wherein the control device (35) further comprises: ◯ a detection unit (49) for detecting a rotational position of the drum (2), and / or ◯ a measuring unit (51) for measuring the amount of air blown in and / or the amount of air extracted and / or the air pressure in the drum (2) and ◯ a
control unit (50) for changing the power of the first fan (12) and / or the second fan (24) depending on the detected rotational position and / or depending on the measured values of the measuring unit (51).