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:
Aug. 22, 1978
Filed:
Feb. 01, 1977
Applicant:
Inventor:
Samuel Ray Alexander, Houston, TX (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02B / ;
U.S. Cl.
CPC ...
210 64 ; 210 10 ;
Abstract
Disinfection and flocculation of waste activated sludge from a bio-oxidation facility is achieved by contacting the activated sludge with zinc salts optionally in the presence of manganese salts. Either simultaneously with the addition of the zinc or after the addition, sufficient base must be added to render the solution basic.