The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 08, 2005
Filed:
Dec. 14, 2000
Ulrich Keil, Krefeld, DE;
Harald Kusch, Güstrow, DE;
Toralf Schönfelder, Rostock, DE;
Bernd Bendinger, Lüneburg, DE;
Knut Wichmann, Marschacht, DE;
Ulrich Keil, Krefeld, DE;
Harald Kusch, Güstrow, DE;
Toralf Schönfelder, Rostock, DE;
Bernd Bendinger, Lüneburg, DE;
Knut Wichmann, Marschacht, DE;
Steag Encotech GmbH, Essen, DE;
Kraftwerks-und Netzgessellschaft mbH, Rostock, DE;
DVGW-Forschungsstelle TUHH, Hamburg, DE;
Abstract
The invention relates to the purification of untreated water which is polluted with dissolved organic carbon compounds which can be biologically or adsorptively removed in a three-step process, whereby the upstream purification step is predominantly biological, i.e. operates as a biofilter (), and both subsequent purification steps are predominantly adsorptive in nature, i.e. operate as adsorbers (). The biofilter () is purified by backwashing, whereby the backwashing periods occur according to the TOC determined between the biofilter () and the upstream adsorber () and/or running time and/or pressure loss. The upstream adsorber () is also cleaned by backwashing and is subsequently shifted into a downstream position alternating with the other adsorber (). The method is suitable for obtaining TOC concentrations in treated water of less than 500 ppb.