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. 13, 1981
Filed:
Feb. 06, 1979
Malcolm Chaikin, Centennial Park, AU;
John R McCracken, Kareela, AU;
Unisearch Limited, Kensington, AU;
Abstract
A process and apparatus for the purification of effluent waters containing organic pollutants by a rapid biological oxidation (activated sludge) process characterized in that the liquid to be purified is introduced into a tank containing a liquid having a high biomass concentration. Liquid is drawn from the tank and reintroduced through an aerating device in such a way as to produce rotation of the liquid in the tank to the extent that a vortex is produced on the surface. A part of the liquid taken from the tank is strayed on to the vortex and a proportion passed to a mechanical separating means that separates sludge from the liquid and a proportion of the separated sludge is reintroduced directly in to the tank. The liquid from which the sludge has been removed constitutes the purified effluent.