Treatment of organic waste

摘要

There is provided an apparatus for assisting hygienization of organic waste. The apparatus comprises at least one reception means for receiving organic solid matter and organic waste, mixing means for mixing the organic waste and the organic solid matter together into an organic mixture, selecting means for selecting whether to expose the organic mixture in the mixing means to either: aeration in order to create a homogenized and internally oxygenous organic mixture, thereby accelerating the hygienization of the organic mixture, or a heat treatment, wherein the heat treatment performs the hygienization of the organic mixture, or to neither the aeration nor the heat treatment. The mixing means may then expose the organic mixture to the aeration, or to the heat treatment, or to neither of the aeration nor the heat treatment on the basis of the selection. The apparatus may further comprise delivery means for passing the organic mixture to either aerobic biodegradation or an end user.

主权项

1. An apparatus for improving hygienization of organic waste, the apparatus comprising:
first and second reception units configured to receive organic solid matter and organic waste respectively; a first screw conveyer configured to convey the organic solid matter from the first reception unit onwards and a second screw conveyer configured to convey the organic waste from the second reception unit onwards; a mixer configured to mix the organic waste and the organic solid matter conveyed from the respective first and second reception units to form an organic mixture; first means for aerating the organic mixture in the mixer so as to enable the apparatus to operate in a first mode wherein the organic mixture is hygienized by aeration to create a homogenized and internally oxygenous organic mixture so as to accelerate hygienization of the organic mixture; second means for heating the organic mixture in the mixer so as to enable the apparatus to operate in a second mode wherein the organic mixture is heat treated to accelerate hygienization of the organic mixture; a controller consisting of a single unit operably connected to the first means for aerating and the second means for heating so that the controller can control operation of both the first means and the second means, the controller being configured (a) to control a rotational velocity of each of the respective first and second screw conveyers based on an initial moisture content of the organic waste and thereby to control a relative proportion of organic waste to organic solid matter conveyed into the mixer to enable attainment of a desired moisture content of the organic mixture in the mixer, and (b) to select whether to expose the organic mixture to aeration from the first means without heat from the second means or to heat treatment from the second means without aeration from the first means so as to control whether the apparatus operates in the first mode or the second mode based on at least one factor selected from the group consisting of a moisture content of material received in the first and second reception units, a desired use of the organic mixture after being hygienized in the mixer, a desired time efficiency of the hygienization and a space available for the organic mixture after being hygienized in the mixer; and an outlet configured to allow passage of hygienized organic mixture from the mixer, wherein the mixer defines an enclosed space from which the organic mixture cannot leak out prior to being hygienized and passing through the outlet; wherein the aeration of the organic mixture in the first mode and the heat treatment of the organic mixture in the second mode is performed in the same enclosed space, and wherein the apparatus further comprises a plurality of sealed pipes disposed along the mixer so that air from the aeration or heat from the heat treatment is transferred uniformly into the enclosed space.