Method of producing a soil enrichment product from dewatered...

Details Method of producing a soil enrichment product from dewatered... Method of producing a soil enrichment product from dewatered...

2007-12-25

2007-12-25

Gravini, S. (Department: 3749)

Drying and gas or vapor contact with solids

Process

Gas or vapor pressure is subatmospheric

Reexamination Certificate

active

10917546

ABSTRACT:
A method of pasteurizing dewatered sludge into valuable soil conditioners is provided. Unpasteurized dewatered sludge is introduced into a first end of an dryer and maintained under vacuum pressure. Moisture is removed using a condenser and knock out tank while a boiler provides heat to treat the dewatered sludge. An auger moves the sludge to an outlet.

REFERENCES:
patent: 3802089 (1974-04-01), Stephanoff
patent: 4013516 (1977-03-01), Greenfield et al.
patent: 5681481 (1997-10-01), Christy et al.
patent: 5741465 (1998-04-01), Gregg
patent: 2003/0136747 (2003-07-01), Wood et al.

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