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:
Dec. 11, 1990
Filed:
Sep. 19, 1989
Egbert Schippert, Dierdorf, DE;
Keramchemie GmbH, Siershahn, DE;
Abstract
In a known method for the purification of exhaust air containing impurities which are biologically degradable and difficultly soluble in water, by means of activated sludge washing liquid in an absorption tower, pulverized activated carbon is added to the activated sludge washing liquid. The impurities are initially absorbed by the activated carbon and are subsequently degraded by the microorganisms of the activated sludge. Since the impurities are not transferred directly to the activated carbon, but through the washing liquid, material exchange apparatus having high turbulence are required which have a high energy consumption. By adding a high-boiling, organic solvent, for example, dialkyl phthalate, material exchange apparatus having a low energy consumption can be used, the absorption efficiency is increased and peak loads can be compensated in a buffer-like manner.