Sewage sludge


Drying without backfeeding. Corrosive and abrasive sewage sludge with 84% water. Wet material highly plastic, balls readily. Problems: Eliminate backfeed. Only small space available outdoors for installation. Avoid objectionable odor. Results: Dryers operating since 1950 with high efficiency. Greatly reduced fire hazard. Heat consumption: 3 cu. ft. gas per pound water. Power consumption: 3.5 hp per 1000 lbs water. Nominal corrosion and wear due to abrasion. Operation odorless.


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