Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Reexamination Certificate
2006-12-12
2006-12-12
Barry, Chester T (Department: 1724)
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
C210S722000, C210S729000, C210S732000, C210S752000, C210S757000, C210S759000
Reexamination Certificate
active
07147783
ABSTRACT:
A cost-effective method for reducing the dissolved sulfide content in a wastewater stream and thereby hydrogen sulfide emissions therefrom involving the steps of adding a transition metal salt to the wastewater stream at the upper reaches of a wastewater collection system prior to at least some hydrogen sulfide volatilization followed by addition of an oxidant to the wastewater stream to generate elemental sulfur and a transition metal salt which subsequently participates in additional hydrogen sulfide capturing steps, thereby also improving water quality and wastewater treatment plant operations.
REFERENCES:
patent: 3906039 (1975-09-01), Furkert
patent: 4292293 (1981-09-01), Johnson et al.
patent: 4293416 (1981-10-01), Keoteklian
patent: 4311680 (1982-01-01), Frech et al.
patent: 4363215 (1982-12-01), Sharp
patent: 4388194 (1983-06-01), Hills
patent: 4435371 (1984-03-01), Frech et al.
patent: 4789530 (1988-12-01), Johnson et al.
patent: 4883601 (1989-11-01), Koepke et al.
patent: 5071622 (1991-12-01), Dunson, Jr.
patent: 5427752 (1995-06-01), Suehiro et al.
patent: 5635078 (1997-06-01), Yan
patent: 5702615 (1997-12-01), Numata et al.
patent: 5705135 (1998-01-01), Deberry et al.
patent: 6245553 (2001-06-01), Keyser
patent: 6428701 (2002-08-01), Mullennix et al.
patent: 6495096 (2002-12-01), Hamaguchi et al.
patent: 6773604 (2004-08-01), Walton et al.
patent: 6855256 (2005-02-01), Blais et al.
Weber, M.D., “Evaluation and optimization of ferric chloride and chlorine feed rates for odor control,” WEF Specialty Conference Series Proceedings, Odor and Volatile Organic Compound Emission Control for Municipal and Industrial Wastewater Treatment-Facilities, Apr. 24-27, 1994, 2-1-2-12.
Crabtree, J.H., et al., “The oxidation of iron(II) by chlorine,”Inorganic Chemistry,1965, p. 1348.
“Hydrogen sulfide and sulfuric acid estimation techniques,”Sewer and Tank Sediment Flushing: Case Studies, EPA/600/R-98/I57, Chapter 4,available at http://www.epa.gov/ednnrmrl/publications/reports/epa600r98157/chapter4.pdf, 1-12.
Jiang, J.-Q., et al., “Pre-polymerised inorganic coagulants and phosphorus removal by coagulation—a review,”ISSN 0378-4738, Water SA,1998, 24(3), 237-244.
“Odor control in wastewater treatment plants,”WEF Manual of Practice No. 22, Water Environment Federation,1995, pp. 132 and 164.
Pavoni, J.L., et al. (Eds.), “Evaluation of wastewater treatment alternatives,”Handbook of Water Quality Management Planning, Table 3-3 Wastewater Constituents(Ref. 3-1), 1997, p. 93.
Rad, H., et al., “Chemically assisted primary treatment a viable alternative to upgrading overloaded treatment plants,”WPCF, 63rdAnnual Conf.,Oct. 8-11, 1990, 1-22.
Vikesland, P.J., et al., “Modeling the kinetics of ferrous iron oxidation by monochloramine,”Environ. Sci. Technol.,2002, 36, 662-668.
CRC Handbook of chemistry and Physics,59thed. Table of Physical Constants of Inorganic Compounds, 1978-1979, p. B-127.
Pomeroy, R.D., et al., “Progress report on sulfide control research,”Sew, Works J.,1946, 18, 597.
www.h2o2.com/applications/municipalwastewater/ironsalts2.html, (last modified Jun. 16, 2001).
Water Environment Federation and American Society of Civil Engineers,“Order control in wastewater treatment plants,” WEF Manual of Practice No. 22, 1995.
Weber, M.D., et al., “Evaluation and optimization of ferric chloride and chlorine feed rates for order control,”WEF Specialty Conference Series Proceedings,Order and Volatile Organic Compound Emission Control for Municipal and Industrial Wastewater Treatment Facilities, Apr. 24-27, 1994, 2-1-2-12.
Duggan Scott W.
Fagan Michael R.
Walton John R.
Barry Chester T
U.S. Peroxide LLC
Woodcock & Washburn LLP
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