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. 22, 2012
Filed:
Jun. 28, 2007
Applicants:
Yoshihiro Etou, Tokyo, JP;
Hiroyuki Asada, Tokyo, JP;
Yu Tanaka, Tokyo, JP;
Inventors:
Assignee:
Kurita Water Industries Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method and an apparatus for treating selenium-containing wastewater, in which wastewater containing hexavalent selenium is subjected to reduction treatment, selenium can be effectively removed at a small amount of metal leached, and, preferably, sludge produced during treatment is white, thereby facilitating the disposal of the sludge. The selenium-containing wastewater is brought into contact with an alloy or a mixture of metallic titanium and a first metal other than metallic titanium to partially leach the first metal, thereby subjecting selenium in the wastewater to reduction treatment.