Method and device for the wet composting of organic sludge
OwnerHans Gujerinventor
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Abstract
There is disclosed a method and apparatus for composting organic sludge by mixing the sludge with oxygen-containing gas in a gas impermeable, rotatable drum, and cooling the drum to maintain the temperature within the drum above but near the pasteurization temperature.
Claims14
A method for wet composting organic sludge comprising feeding the sludge to be treated into a continuous flow system including a gas-tight mixing container together with an oxygen-containing gas for promoting a composting reaction in the sludge, maintaining a static pressure in the mixing container within a range above 1 atmosphere and up to 6 atmospheres, said static pressure being developed by the composted sludge after flowing through said container, and simultaneously maintaining the temperature within the flow system within a range above 55.degree. C. and less than 75.degree. C.
A method for wet composting organic sludge in a continuous flow system comprising
- statically pressurizing a gas-tight mixing container in the system within a range above 1 atmosphere and up to 6 atmospheres;
- force-feeding the sludge to be treated and an oxygen-containing gas for promoting a composting reaction in the sludge through said statically pressurized container;
- continuously intermixing oxygen-containing gas accumulating in the upper areas of said container with said sludge throughout said container;
- and
- maintaining the temperature of the container not to exceed 75.degree. C.
Dependencies are inferred from the claim text.