Method of purifying polluted water
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United States of America Patent
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Nov 3, 2009
Grant Date -
Mar 20, 2008
app pub date -
Jun 28, 2005
filing date -
Jun 28, 2004
priority date (Note) -
Expired
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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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