Invention Grant
- Patent Title: Wastewater treatment method and wastewater treatment apparatus
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Application No.: US17639768Application Date: 2020-09-02
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Publication No.: US11794147B2Publication Date: 2023-10-24
- Inventor: Yasuhiro Matsui , Hideki Komatsu , Yasuhito Ishii , Manabu Ozawa , Yoshinori Nishiki , Masaaki Kato , Rie Morita
- Applicant: Yokogawa Electric Corporation , De Nora Permelec Ltd
- Applicant Address: JP Tokyo
- Assignee: Yokogawa Electric Corporation,De Nora Permelec Ltd
- Current Assignee: Yokogawa Electric Corporation,De Nora Permelec Ltd
- Current Assignee Address: JP Tokyo; JP Kanagawa
- Agency: Rankin, Hill & Clark LLP
- Priority: JP 19162106 2019.09.05
- International Application: PCT/JP2020/033272 2020.09.02
- International Announcement: WO2021/045107A 2021.03.11
- Date entered country: 2022-03-02
- Main IPC: B01D61/02
- IPC: B01D61/02 ; B01D61/42 ; B01D61/58
Abstract:
A wastewater treatment method includes: a soft water treatment 1 of crystallizing calcium carbonate from wastewater to remove the calcium carbonate therefrom; and an electrolysis 2 of 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 1.
Public/Granted literature
- US20230241555A1 WASTEWATER TREATMENT METHOD AND WASTEWATER TREATMENT APPARATUS Public/Granted day:2023-08-03
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