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. 29, 1980
Filed:
Jan. 12, 1979
Akitoshi Iwatani, Marugame, JP;
Masataro Takuma, Kagawa, JP;
Ishigaki Kiko Co., Ltd., Tokyo, JP;
Abstract
An arrangement for treating wastewater containing soluble organic matter through the proliferation of aerobic microorgnisms to purify the wastewater. In an apparatus having a wastewater tank, a water pervious drum rotatably mounted in the tank and partially submerged in wastewater therein, and a multiplicity of biological contactors packed in the drum, the improvement comprising the biological contactors being of hollow structure, each having at least two small openings, a subsidiary biological contactor being provided in the interior of each biological contactor where required, the contactors being compactly packed in the drum so as to be prevented from movement therein.