Method for production of storage-stable pellets from clarified sludge
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United States of America Patent
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Oct 28, 2003
Grant Date -
Jun 13, 2002
app pub date -
Nov 21, 2001
filing date -
Nov 23, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In order to produce pellets or agglomerates in an economically feasible manner from clarified sludge which contains disease-causing bacteria and which is dewatered in a solid mantle worm-gear centrifuge (11) and is subsequently thermally dried in the centrifuge housing (14), and which satisfy the conditions of being hygienically unremarkable and also storage-stable, according to the invention it is proposed that the clarified sludge pellets (25), still hot or warm due to thermal clarified sludge drying, are held at their temperature in a sanitizing apparatus (26) for a dwell time of at least 10 min and thus sanitized and additionally dried.
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