Process for the anaerobic treatment of flowable and nonflowable organic waste
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United States of America Patent
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Apr 29, 2003
Grant Date -
Mar 27, 2003
app pub date -
Sep 25, 2001
filing date -
Sep 25, 2001
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Abstract
A method and apparatus for anaerobic treatment of organic wastes in a liquid filled vessel wherein particles of the waste are buoyed and form a floating bed in the liquid by the gasses generated by the anaerobic digestion of the wastes. The bed forms to an upper stratum of the least digested, least dense waste and a lower stratum of the most digested, most dense waste. Liquid from beneath the bed is continuously sprayed over the upper surface of the bed through a series of discharge ports which expands to bed downwardly. Each spraying period is followed by a quiescent period to allow the bed to reform. Over time the floating bed is moved from an inlet end to an outlet end of the vessel where the most digested waste is removed.
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