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. 09, 1979
Filed:
Dec. 20, 1976
Hans U Hauser, Niederweningen, CH;
Bucher-Guyer AG, Maschinenfabrik, Niederweningen, CH;
Abstract
The present invention relates to an apparatus for the controlling of froth during the aeration of liquids. In the aeration (or treatment with gas) of sewage for the biological (or chemical) purification of the latter it is well known that considerable frothing occurs, which cannot be immediately controlled even with considerable effort and expense, for example using froth skimmers, froth barriers, oversize tanks, and the like. The problem is in providing an aeration apparatus which, without additional measures, that is to say by its own resources, is able to control frothing and thus keep it within permissible limits. The expressions 'aeration' and 'air' are here used to refer to any gaseous medium which is to be admixed with any liquid concerned in the present context. Similarly the expression 'air pipe' is to be understood as meaning a pipe for a gaseous medium. The following remarks therefore deal with a case of aeration not only for the sake of simplicity, but also because this is a frequent application of the apparatus described above. It is for the same reason that the aeration of sewage highly charged with organic substances, particularly from livestock establishments, will mainly be discussed.