Device and process for composting and wet fermentation of biological waste
AssigneeBeg Bioenergie GmbH
InventorsJurgen Kanitz, Bruno Kesselring
Life of this patent
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Abstract
Biological waste is squeezed out while being at the same time mixed and homogenized, after which the solid materials freed of liquid are delivered to a composting installation and the liquid fraction is directed to an anaerobic reactor for wet fermentation. Thereby shorter composting and fermentation times can be achieved.
Claims31
In a device for the production of biogas and compost through wet fermentation and composting of bio-residuals with a first reactor for solid materials built as a worm-press solid-liquid separator, which has a liquid outlet and a subsequently arranged anaerobic reactor for fermentation with biogas extraction and a composting installation, the improvement wherein the reactor for solid materials has an inclined worm press arranged at an angle, that above and parallel to this worm press a table or table plates are arranged and the reactor for solid materials has a valve for the removal of sediment.
A process for treating organic bioresidues selected from the group which consists of raw and cooked food leftovers, agricultural and animal wastes and plant components, in which said bioresidues have a minimum moisture content of 40% by volume, said process comprising the steps of:
- (a) with optional addition of water and recycling of a liquid from an anaerobic reactor, intensively mixing said bioresidues and causing water-soluble organic components contained and formed therein to wash out from said bioresidues and pass into a liquid phase in a resulting mixture;
- (b) separating said liquid phase from a solid phase of said residues at least in part by pressing said mixture to express said liquid phase from said solid phase;
- (c) subjecting said solid phase after the expression of said liquid phase therefrom to silocomposting;
- (d) feeding said liquid phase to said anaerobic reactor and fermenting said liquid phase to produce a biogas;
- and
- (e) recovering said biogas from said anaerobic reactor.
Dependencies are inferred from the claim text.