Systems and methods for digestion of solid waste
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United States of America Patent
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Jul 23, 2013
Grant Date -
Jan 10, 2013
app pub date -
Apr 11, 2012
filing date -
Jul 8, 2011
priority date (Note) -
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Abstract
This invention relates generally to systems and methods for digestion of solid waste that simplify solids handling. In certain embodiments, anaerobic methane extraction takes place for a period of time (e.g., from 1 to 4 weeks), after which an aerobic composting process begins in the same chamber. The organic waste remains in place and oxygen (e.g., in air) is forced into the chamber for an additional period of time (e.g., from 2 to 4 weeks). At the conclusion of the aerobic phase, the process yields a rough compost product that is stable and pathogen free. The rough compost can be further processed and blended to create high value engineered soils.
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