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:
Oct. 23, 2001
Filed:
Mar. 20, 2000
Applicant:
Inventors:
Johannes Philippus Maree, Pretoria, ZA;
Andries Gerber, Pretoria, ZA;
Assignee:
CSIR, Pretoria, ZA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C02F 3/30 ;
U.S. Cl.
CPC ...
C02F 3/30 ;
Abstract
A process for treating water having anions comprising sulfur and oxygen dissolved therein involves subjecting the anions to an anaerobic biological reduction to sulfide anions dissolved in the water, followed by a biological oxidation of the sulfide anions to elemental sulfur suspended in the water. The sulfur is separated from the water. The reduction and oxidation are effected together in a series of common reaction stages in which there are oxidizing conditions which permit the biological oxidation without preventing the biological reduction.