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:
Sep. 25, 1979
Filed:
Feb. 02, 1978
Mirja Salkinoja-Salonen, Helsinki, FI;
Enso-Gutzeit Osakeyhtio, Helsinki, FI;
Abstract
Waste water purifying procedure intended to be used in treatment of waste water containing aromatic compounds. In a biofilter in a layer containing bark of wood there is formed a bacterial population comprising one or several of the bactery strains deposited in the Universite of Helsinki Institute of General Microbiology under the deposition codes YM 134-202 and YM 241-268 and which have been formed by packing into biofilters crushed coniferous tree bark and bacteriferous water, ooze, mud or bark residues taken from a water body polluted by chlorinated and unchlorinated phenols and by aromatic carboxylic acids and by thereafter feeding into the biofilters water containing said substances, whereby the bactery strains are characterized by tolerance of the presence of chlorinated and unchlorinated phenols and of aromatic carboxylic acids, and the waste water to be purified is conducted through the biofilter, whereby the waste water is purified by effect of action of the bactery population.