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. 22, 1986
Filed:
Mar. 21, 1985
Applicant:
Inventors:
Takeo Odaka, Niihama, JP;
Hiroichi Miyashita, Niihama, JP;
Assignee:
Sumitomo Metal Mining Company Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ; C01B / ;
U.S. Cl.
CPC ...
210760 ; 423242 ;
Abstract
A method of treating effluents containing sulfur oxide ions, such as sulfite ions, thiosulfate ions, thionate ions and bisulfite ions, comprises blowing ozone-containing air into the effluent to reduce the COD level in the effluent to 6 mg/l or below, and neutralizing the so treated effluent with an alkali. This method is capable of producing neutral effluents with small equipment and within a short period of time, and the treated effluent will not experience an appreciable drop in the pH even if it is left to stand for a prolonged period.