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. 22, 2011
Filed:
May. 26, 2006
Harald Kraft, Oberkirch-Nussbach, DE;
Hans-thomas Armbruster, Achem-Grossweier, DE;
Wendelin Benz, Oberkirch-Zusenhofen, DE;
Harald Kraft, Oberkirch-Nussbach, DE;
Hans-Thomas Armbruster, Achem-Grossweier, DE;
Wendelin Benz, Oberkirch-Zusenhofen, DE;
Papierfabrik August Koehler AG, Oberkirch, DE;
Abstract
The invention relates to a method for the purification of effluent, in particular, effluent from the paper industry, comprising the following method steps: a) aerobic purification of the effluent using activated sludge in an activated sludge tank (), b) settling of at least a part of the effluent/activated sludge mixture exiting the activated sludge tank () in a settling tank (), c) separation of a part of the effluent/activated sludge mixture exiting the settling tank in a separating device () and d) recycling of at least a part of the activated sludge separated off in steps b) and/or c) into the activated sludge tank ().