Liquid purification or separation – Processes – Including controlling process in response to a sensed condition
Patent
1995-05-01
1996-06-11
Drodge, Joseph W.
Liquid purification or separation
Processes
Including controlling process in response to a sensed condition
34136, 34321, 34387, 71 12, 71903, 210741, 210751, 210771, 210774, B01D 1712, C02F 1112, C05F 700
Patent
active
055252397
ABSTRACT:
There is disclosed a heated aeration method of completing the processing of a partially treated mixture of wastewater sludge and alkaline materials to produce a biologically active but pathogenetically clean fertilizer which can safely and easily be spread on agricultural lands. Also disclosed are a product made by the method and an apparatus for carrying out the method. The mixture is loaded into a forceful stream of heated air which carries the mixture through a rotating, internally vaned drum which has an internal, longitudinal, vaned core which rotates with the drum. The core and the vanes impart paths to the mixture particles which allow smaller particles to exit quicker than larger and thereby avoid sterilization and which breaks up larger mixture particles and otherwise enhances the spreadability of the resultant fertilizer. A vane on the core is bent and its portion beyond the bend is pronged to facilitate showering rather than dumping mixture particles.
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Undated advertisement for the N-Viro soil process for converting sludge to soil, admitted prior art.
Undated advertising brochure of TCW-Technocommerce AG for changing sewage muck into fertilizer, admitted prior art.
Advertisement of Duske Design & Equipment for a single pass rotary dryer (Model SPD-500), admitted prior art.
Advertising brochure dated 1985 of Flo-Dry Technology, Ltd. for rotary dryers.
Advertising brochure of M-E-C Company for its dryer systems, including single pass dryers (p. 3), admitted prior art.
Advertising brochure of Standard Steel Coorporation for its rotary drying equipment, admitted prior art.
Letter dated Jul. 20, 1992 from Hugh J. Tobler, Chairman of the Board of Cemen Tech, Inc. to Will Duske Design & Equipment Co., Inc.
Drodge Joseph W.
Duske Design & Equipment Co., Inc.
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