Fluid treatment process and apparatus

Details Fluid treatment process and apparatus Fluid treatment process and apparatus

2009-10-23

2011-10-11

Popovics, Robert James (Department: 1778)

Chemical apparatus and process disinfecting, deodorizing, preser

Process disinfecting, preserving, deodorizing, or sterilizing

Using fluent heat transfer medium other than air

C210S774000

Reexamination Certificate

active

08034289

ABSTRACT:
A water treatment process whereby heat is used and recaptured to pasteurize water and or sewage effluent. Contaminated waters are partially treatable utilizing bacterial and chemical processes; however some bacteria (e.g. Cryptosporidium and Giardia) are resistant to chemicals. The present process raises the temperature of the water to a desired pasteurization temperature and for a corresponding required length of time to destroy pathogens and viruses. A heat exchanger is employed to use the waste heat from the pasteurization tank to pre-heat the fluid entering the tank. After the initial heating of the tank, the pre-heating reduces the required heat to maintain the temperature of the tank. Make-up heat increases the temperature within a small temperature range. The make-up heat may be waste heat from a separate process.

REFERENCES:
patent: 5447642 (1995-09-01), Schenach
patent: 6555055 (2003-04-01), Cisar et al.
patent: 7402241 (2008-07-01), Wright et al.
patent: 7837865 (2010-11-01), Wadstrom
patent: 2009/0004045 (2009-01-01), Fletcher
patent: 2010/0116756 (2010-05-01), Fletcher

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