Method for production of storage-stable pellets from clarified sludge
AssigneeBaker Hughes (Deutschland) GmbH
InventorWilfried Schnabel
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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.
Claims10
A method for production of storage-stable pellets from clarified sludge, which is mechanically dewatered in a centrifuge, subsequently thermally dried with hot gas in a housing of the centrifuge and shaped into pellets outside of the centrifuge, wherein the clarified sludge pellets, still hot or warm due to the thermal clarified sludge drying, are held at their temperature in a sanitizing apparatus for a dwell time of at least 10 minutes and thus sanitized and additionally dried.
Dependencies are inferred from the claim text.