Liquid purification or separation – Processes – Including controlling process in response to a sensed condition
Reexamination Certificate
2007-04-18
2010-06-15
Smith, Duane (Department: 1797)
Liquid purification or separation
Processes
Including controlling process in response to a sensed condition
C210S754000, C210S755000, C210S756000, C210S752000
Reexamination Certificate
active
07736520
ABSTRACT:
A process for the reduction of N-nitrodimethylamine (NDMA) and for control of trihalomethanes (THMs) and haloacetic acids (HAAs) formation in fully nitrified wastewater effluent, comprising first adding chlorine to the effluent, then adding combined chlorine.
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A.C. Twort, D.D. Ratnayaka and M.J. Brandt, “Disinfection of Water”, Water Supply, © Jun. 2000 , Elsevier,5th Edition, pp. 429-463.
Mark W. LeChevalier and Kwok-Keung Au, “Inactivation (disinfection) processes”, Water Treatment and Pathogen Control: Process Efficiency in Achieving Safe Drinking Water, © 2004, World Health Orgainization, Chapter 3, pp. 41-65.
J.L Rennecker, A.M. Driedger, S.A. Rubin and B.J. Marinas,“Synergy In Sequential Inactivation OfCryptosporidium parvumWith Ozone/Free Chlorine And Ozone/Monochloramine”, Water Research, © 2000 Elsevier Science Ltd.,vol. 34, No. 17 pp. 4121-4130.
Chen C. and Zhang X J, “Reduction of disinfection by-products with short-term free chlorine plus chloramines disinfection process”, Sep. 2004, Abstract of presentation at 4th IWA World Water Congress and Exhibition, Marrakech, Morocco.
Mitch W A and Sedlak D L, “Characterization and Fate of N-Nitrosodimethylamine Precursors in Municipal Wastewater Treatment Plants”, Environ. Sci. Technol., 2004, 38(5), 1445-1454. NOTE: The article on 1449 form dated May 23, 2008 has same title, but shows different and inconsistent bibliographic info. This citation here is correct.
Mitch, et al; Characterization and Fate of N-Nitrosodimethylamine Precursors in Municipal Wastewater Treatment Plants; Environmental Science & Technology, 36, 588-595, (2002).
Schreiber, et al; Influence of the Order of Reagent Addition on NDMA Formation during Chloramination; Envionmental Science & Technology, 39, 3811-3818, (2005).
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Chen, et al; Simultaneous Control of Microorganism, Disinfection By-Products and BioStability by Sequential Chlorination Disinfection; Environmental Science, vol. 27, No. 1, (2006) (Translation of Introduction attached).
Astor Sanford
County Sanitation Districts of Los Angeles County
Durand Paul J
Lewis Brisbois Bisgaard & Smith
Smith Duane
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