Process to bacterially decompose organic waste
AssigneeEco-Habitat B.V.
InventorsServan KREHER, Peter Teunis
Life of this patent
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Abstract
The invention is directed to a process and equipment for use in a process to bacterially decompose organic waste to a dry composted end material wherein organic waste is composted in a composting tank in the presence of oxygen and aerobic bacteria to obtain a wet composted material. The wet composted material is partly removed from the composting tank and dried such to lower the water content of the composted material to obtain dry composted end material.
Claims19
Process to bacterially decompose organic waste material to a composted material in a series of two or more composting reactor spaces of one or more composting tanks in the presence of oxygen and aerobic bacteria,
- wherein in a batch operation waste material is added continuously or intermittedly to the first reactor space of two or more composting reactor spaces which reactor space comprises composted material from an earlier batch and aerobic bacteria and wherein the content of the first reactor space is partly removed from the first reactor space as intermediate wet composted material comprising aerobic bacteria at the end of the batch operation and wherein part of the composted material and aerobic bacteria remain in the first reactor space for performing a next batch operation and wherein the batch operation in the first reactor space has a duration of between 10 and 30 hours as calculated from the start of the addition of waste material in the batch operation to the start of removing wet intermediate composted material from the first reactor space.
Organic waste composting equipment comprising an elongated tank into which organic waste can be charged, wherein the tank comprises an inlet for organic waste, an outlet for composted material and wherein the tank is provided with two rotating mixing shafts provided with a helical mixing element connected to the shafts by supports which radially extend from the shaft, wherein the two shafts are positioned substantially parallel with respect to each other in the elongated direction of the tank thereby defining two cylindrical mixing zones in the tank,
- wherein below each of the two cylindrical mixing zones an elongated semi-tubular surface is provided as the lower inner wall of the tank, and
- wherein a screw feeder is positioned at the lower inner wall of the tank between the two semi-tubular surfaces and positioned in a tubular housing which tubular housing is open at its upper end facing the interior of the tank and wherein in use composted material may be moved to the outlet for composted material.
Dependencies are inferred from the claim text.