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:
Apr. 11, 1989
Filed:
Apr. 21, 1987
Artur Reischl, Hochenschwand, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
The present invention is directed to an improved process for the biological treatment of an aqueous, waste-containing liquid by the removal of organic matter by microorganisms wherein a carrier material for said microorganisms is added to said liquid and wherein said carrier material comprises a filler-containing, hydrophilic, open-celled polymer in the form of separate individual particles, the improvement wherein said polymer particles, when saturated with water and charged with at least 70 volume-% of biomass formed in the course of the process, have an average density of slightly below the density of said liquid and thereby are suspended in the upper two-thirds of said liquid.