Process and machines for transforming household waste

Chemistry: molecular biology and microbiology – Miscellaneous

Patent

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Details

435316, 71 9, 71901, C12M 112, C12M 102, C05F 902

Patent

active

053227921

ABSTRACT:
An apparatus for transforming an input garbage mixture into separate fermented and non-fermented output products has a fermentation stage for depositing an input garbage mixture into non-compacted swathes to allow fermentation of the fermentable, organic waste materials therein, an input stage for loading the garbage mixture, and at least one grinder/separator stage having a grinder for grinding the garbage mixture into smaller particles and a separator with a screen of a selected mesh size for separating ground waste particles up to the selected mesh size as a fermented output product, and conveying the remainder of the particles to a reject output as a non-fermented output product. Fermentation of the input garbage mixture allows for organic maturation of the fermentable, organic waste materials in the mixture, as well as softening and rendering the fermented materials more susceptible to being broken up into small particles in the grinder/separator stage. The input stage is equipped with a hopper, a pulsed air dryer, and a magnetic drum for picking off ferrous materials. In a preferred configuration, the grinder has three rotating axles in triangular arrangement carrying chains mounted in rows thereon with hardened tips on their free ends. Successive grinder/separator stages are used to reduce the particles to the desired output size, with the separator of each subsequent stage having a progressively finer mesh size. A pulverizer/grinder stage pulverizes the reject output (mostly plastics) into smaller particles. The pulverized particles can be compressed and heat molded to form fence parts, paving blocks, road bedding materials, etc. A modified version of the grinder is used for shredding old tires into rubber particles that can be compression-molded into usable items. The invention includes the related processes and processed products.

REFERENCES:
patent: 2952492 (1960-09-01), Finn
patent: 3041157 (1962-06-01), Crane et al.
patent: 3451781 (1969-06-01), Greene
patent: 3930799 (1976-01-01), Eweson
patent: 4050917 (1977-09-01), Varro
patent: 4846975 (1989-07-01), Kelyman
patent: 5071075 (1991-12-01), Wiens

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