Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1993-07-28
1995-04-11
McCarthy, Neil
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
210751, 210764, C02F 1114, C02F 1118
Patent
active
054055369
ABSTRACT:
Process for pathogen reduction in waste where dewatered sludge having a solids content in the range of 10-60% is mixed with a selected alkaline additive selected from the group consisting of calcium oxide or calcium carbonate group. Hydration to calcium hydroxide occurs with an attendant release of heat. The pH of the sludge is then elevated and the heat of the hydration reaction is retained. Supplemental heat is added to the sludge, either to preheat the sludge prior to mixing it, or while mixing it, or both, such that effective neutralization of pathogens results. The supplemental heat is added by indirectly heating the sludge by heat generated by electric elements carried either in the mixing member, or by the chamber, or both, with electric power being supplied from outside the chamber.
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McCarthy Neil
RDP Company
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