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:
May. 20, 1980
Filed:
Dec. 08, 1978
Applicant:
Inventors:
Koh Shimizu, Osaka, JP;
Terumi Uchimura, Osaka, JP;
Ken-Ichi Uede, Osaka, JP;
Katuyoshi Nakamura, Osaka, JP;
Assignee:
Kubota Tekko Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02C / ;
U.S. Cl.
CPC ...
210 / ; 210 / ; 210 / ;
Abstract
Process for treating sewage sludge at relatively low temperatures below 165.degree. C. under pressure. The sludge is heat treated in a reactor in which it is brought into close, uniform contact with air with the discharge of air bubbles from the reactor effectively prevented. The liquor separated from the treated sludge is treated by two steps of the activated sludge process. The malodorous gas produced during the treatment of sludge is also deodorized or incinerated. A fully closed treatment process is provided which does not cause any secondary pollution problem.