Sludge treatment process

Details Sludge treatment process Sludge treatment process

1989-05-18

1990-09-18

Bennet, Henry A.

Drying and gas or vapor contact with solids

Apparatus

Rotary drums or receptacles

34 17, 34 35, 34 86, 34102, 34 95, 432215, F26B 324

Patent

active

049569260

ABSTRACT:
A system is described for producing small uniform pellets of predetermined size which are substantially free of fines from mechanically dewatered sewage sludge. The system includes a process and apparatus for mixing the dewatered sludge with previously dried, recycled particles of said sludge, drying said mixture in a thermal drier, separating a substantial portion of the dried solids from the drier off gas, clarifying said separated solids to separate the pellets of predetermined size, oversize pellets, and undersize pellets and particles, mechanically crushing the oversize pellets and admixing the crushed oversize pellets with the undersize pellets and particles, and recycling said mixture by mixing said mixture with incoming dewatered sludge to the drier.

REFERENCES:
patent: 4829678 (1989-05-01), Glorioso

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