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:
Sep. 05, 2017
Filed:
Jan. 06, 2011
Hiroshi Kobayashi, Niihama, JP;
Tatsuya Higaki, Niihama, JP;
Hirofumi Shoji, Niihama, JP;
Norihisa Toki, Niihama, JP;
Keiji Kudo, Niihama, JP;
Hiroyuki Mitsui, Tokyo, JP;
Osamu Nakai, Tokyo, JP;
Hiroshi Kobayashi, Niihama, JP;
Tatsuya Higaki, Niihama, JP;
Hirofumi Shoji, Niihama, JP;
Norihisa Toki, Niihama, JP;
Keiji Kudo, Niihama, JP;
Hiroyuki Mitsui, Tokyo, JP;
Osamu Nakai, Tokyo, JP;
Sumitomo Mental Mining Co., Ltd., Tokyo, JP;
Abstract
The wastewater treatment method is to obtain demanganized wastewater, through a step wherein an acid or an alkali is added to sulfuric acid acidified wastewater to adjust pH to not less than 4.0 and not more than 6.0, whereby the sulfuric acid acidified wastewater is separated into a dealuminized solution and an aluminum precipitate; a step wherein a slurrying solution is added to the aluminum precipitate to form a slurry, then an alkali is added to adjust pH to not less than 9.0 and not more than 9.5, whereby an pH-adjusted aluminum precipitate slurry is formed; a step wherein an alkali is added to the dealuminized solution to adjust pH to not less than 8.0 and not more than 9.0; and others.