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. 24, 2023
Filed:
Sep. 02, 2020
Yokogawa Electric Corporation, Tokyo, JP;
DE Nora Permelec Ltd, Kanagawa, JP;
Yasuhiro Matsui, Musashino, JP;
Hideki Komatsu, Musashino, JP;
Yasuhito Ishii, Musashino, JP;
Manabu Ozawa, Tamano, JP;
Yoshinori Nishiki, Fujisawa, JP;
Masaaki Kato, Tamano, JP;
Rie Morita, Tamano, JP;
Yokogawa Electric Corporation, Tokyo, JP;
De Nora Permelec Ltd, Kanagawa, JP;
Abstract
A wastewater treatment method includes: a soft water treatmentof crystallizing calcium carbonate from wastewater to remove the calcium carbonate therefrom; and an electrolysisof electrolyzing some of the wastewater from which the calcium carbonate has been removed to obtain an acidic aqueous solution and an alkaline aqueous solution, wherein at least some of the alkaline aqueous solution is circulated to be used in the soft water treatment