Liquid purification or separation – Processes – Chemical treatment
Reexamination Certificate
2005-06-28
2009-11-03
Smith, Duane (Department: 1797)
Liquid purification or separation
Processes
Chemical treatment
C210S752000, C210S761000, C210S764000, C422S028000, C422S186070, C422S186080
Reexamination Certificate
active
07611638
ABSTRACT:
In a first treatment step part of at least one difficulty biodegradable or non-biodegradable organic compound is oxidized in polluted water by bringing said polluted water into contact with an ozone containing gas. The effluent is subsequently diluted with an aqueous liquid before a second treatment with ozone is carried out. If the concentration of the organic compound is still not sufficiently low, the treated effluent is diluted again and subjected to a further treatment with ozone. It was found that a more effective ozone treatment was obtained by the dilution or dilutions and that in particular no pH control was needed, so that no formation of additional salts occurred.
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Masten, S. J. et al; “The Use of Ozonation to Degrate Organic Contaminants in Wastewaters Advances in Water Treatment Technologies”, Environmental Science and Technology, American Chemical Society, Easton, PA US, vol. 28, No. 4, Apr. 1, 1994, pp. 180A-185A.
Camel V. et al, “The Use of Ozone and Associated Oxidation Processes in Drinking Water Treatment”, Water Research, Elsevier Science Publishers, Amsterdam, NL, vol. 32, No. 11, Nov. 1, 1998, pp. 3208-3222.
Neyt Alain
Wouters Luc
Durand Paul J
Recticel
Smith Duane
Sughrue & Mion, PLLC
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