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filingDate 1996-10-28-04:00^^<http://www.w3.org/2001/XMLSchema#date>
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publicationDate 1997-06-11-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber EP-0778245-A1
titleOfInvention Method for removing heavy metals form waste water
abstract a) dem Abwasser ein Teilvolumen entnimmt, b) in dem Teilvolumen suspendierte ferri- oder ferromagnetische Partikel herstellt, indem mann ein Eisen(II)-Salz löst, mit einem alkalischen Medium das gelöste Eisen(II)-Salz ausfällt, in das Teilvolumen Luft einleitet, b) den Teilstrom oder das Teilvolumen wieder mit dem Abwasser vereinigt, c) ein alkalisches Medium in einer solchen Menge zugibt, daß sich ein Niederschlag bildet, d) den Niederschlag in einem Magnetfilter abtrennt. The invention relates to a method for separating heavy metals from waste water in which a) takes a partial volume from the waste water, b) producing suspended ferromagnetic or ferromagnetic particles in the partial volume by an iron (II) salt dissolves, the dissolved iron (II) salt precipitates with an alkaline medium, introduces air into the partial volume, b) the partial flow or partial volume is combined again with the waste water, c) adding an alkaline medium in such an amount that a precipitate forms, d) the precipitate is separated off in a magnetic filter.
priorityDate 1995-12-07-04:00^^<http://www.w3.org/2001/XMLSchema#date>
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