METHOD FOR TREATING MUDDY WATER

A method for treating muddy water which comprises adding a first chemical containing an alkali metal or alkaline earth metal oxide or hydroxide to muddy water to be treated, thereby rendering muddy water alkaline, adding a second chemical containing an anionic polymer coagulant to muddy water simult...

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Bibliographic Details
Main Authors OKAMOTO, SOHEI, HIRANO, JIRO, OHNISHI, TAKUSABURO
Format Patent
LanguageEnglish
Published 09.09.1992
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Summary:A method for treating muddy water which comprises adding a first chemical containing an alkali metal or alkaline earth metal oxide or hydroxide to muddy water to be treated, thereby rendering muddy water alkaline, adding a second chemical containing an anionic polymer coagulant to muddy water simultaneously with or after the addition of the chemical, further adding a third chemical containing a sulfate thereby rendering the muddy water weakly alkaline, and then adding a fourth chemical containing an anionic polymer coagulant to muddy water. As a result, larged-sized and hard flocs are produced.
Bibliography:Application Number: EP19900105161