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:
Jan. 16, 1979
Filed:
Aug. 18, 1977
Harald Skogman, Skanor, SE;
Lennart Huss, Malmo, SE;
Svenska Sockerfabriks AB, Malmo, SE;
Abstract
A method of biologically purifying waste water rich in carbohydrates or proteins, wherein the waste water is treated in an anaerobic stage while leading off generated methane gas, sludge-bearing water formed being subjected to sludge separation during formation of a first sludge concentrate which is returned to the anaerobic stage, and that the water thus treated is treated in an aerobic stage, sludge-bearing water formed being subjected to slude separation during formation of a second sludge concentrate, of which at least a portion is returned to the aerobic stage, while possible excess is returned to the anaerobic stage, a portion of the first, and possibly also of the second sludge concentrate being led off for disposal.