Liquid purification or separation – Automatic control – Thermal
Patent
1994-11-11
1995-07-18
McCarthy, Neil
Liquid purification or separation
Automatic control
Thermal
210205, 210219, 366146, 366318, B01D 2130
Patent
active
054338441
ABSTRACT:
Apparatus and 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.
REFERENCES:
patent: 2297195 (1942-09-01), Behringer
patent: 2723954 (1955-11-01), Young
patent: 3793841 (1974-02-01), Dozsa
patent: 4028240 (1977-06-01), Manchak, Jr.
patent: 4043904 (1977-08-01), Endo et al.
patent: 4118243 (1978-10-01), Sandesara
patent: 4190372 (1980-02-01), Takagi et al.
patent: 4270279 (1981-06-01), Roediger
patent: 4295972 (1981-10-01), Kamei
patent: 4306978 (1981-12-01), Wurtz
patent: 4369111 (1983-01-01), Roediger
patent: 4443109 (1984-04-01), Watts
patent: 4460710 (1984-07-01), Reimann
patent: 4474479 (1984-10-01), Redelman
patent: 4514307 (1985-04-01), Chestnut et al.
patent: 4541986 (1985-09-01), Schwab et al.
patent: 4597872 (1986-07-01), Andersoon et al.
patent: 4614587 (1986-09-01), Andersson et al.
patent: 4632759 (1986-12-01), Andersson et al.
patent: 4659471 (1987-04-01), Molin et al.
patent: 4659472 (1987-04-01), Norlund et al.
patent: 4663043 (1987-05-01), Molin et al.
patent: 4709003 (1987-03-01), Manchak
patent: 4710032 (1987-12-01), Nordlund
patent: 4760650 (1988-08-01), Theliander et al.
patent: 4779528 (1988-10-01), Bruke
patent: 4781842 (1988-11-01), Nicholson
patent: 4852269 (1989-08-01), Glorioso
patent: 4902431 (1990-02-01), Nicholson et al.
patent: 4941132 (1990-07-01), Horn et al.
patent: 4981600 (1991-01-01), Tobler et al.
patent: 5013458 (1991-05-01), Christy, Sr. et al.
patent: 5083506 (1992-01-01), Horn et al.
Wallace & Tiernan, Paste-Type Lime-Slaking Systems, Sep. 1989.
Berman, Lime Stabilization/Pasteurization vs. Traditional Methods, Jun. 1989.
Westphal & Christensen, Lime Stabilization: Effectiveness of Two Process Modifications, Villanova University, Jun. 1982.
EPA, Process Design Manual for Sludge Treatment and Disposal, Sep. 1979.
Christensen, Lime Stabilization of Wastewater Sludges-An Assessment, Villanova University, Mar. 1981.
Westphal & Christensen, Lime Stabilization: Effectiveness of Two Process Modifications, Nov. 1983.
Wallace & Tiernan Series A-758 CAT. File 330,100 Sep. 1989.
McCarthy Neil
RDP Company
LandOfFree
Apparatus for pathogen reduction in waste does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for pathogen reduction in waste, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for pathogen reduction in waste will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2418011