METHODS AND SYSTEMS FOR SEWAGE SLUDGE TREATMENT
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United States of America Patent
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Mar 26, 2015
app pub date -
Jul 13, 2012
filing date -
Nov 28, 2011
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Abstract
The present invention provides methods for increasing soluble chemical oxygen demand (sCOD) in sewage sludge. These methods include passing the sewage sludge through one or more devices that contains (a) a hollow body provided with a straight-through passage of substantially constant cross-section, the passage having an inlet end and an outlet end for the entry and discharge respectively of the sewage sludge, (b) a transport fluid nozzle substantially circumscribing and opening into the passage intermediate the inlet and outlet ends thereof, (c) a transport fluid inlet communicating with the transport fluid nozzle for the introduction of a transport fluid, and (d) a mixing chamber being formed within the passage downstream of the transport fluid nozzle. The sewage sludge is then passed through a digester.
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