Title:
WASTEWATER TREATMENT DEVICE AND WASTEWATER TREATMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2022/270447
Kind Code:
A1
Abstract:
A wastewater treatment device 10 is provided which controls the amount of dissolved oxygen DO in a nitrification zone and the oxidation redox potential ORP in a denitrification zone so as to enable stably performing nitrification and denitrification. This wastewater treatment device 10 is provided with a reaction vessel 1, and the reaction vessel 1 comprises partition plate 2 which separates a nitrification region D1 where nitrification is performed and a denitrification region D2 where denitrification is performed, and a circulation plate 5 which is arranged in the nitrification region D1; the partition plate 2 has an overflow opening 2c where the treated water overflows from the nitrification region D1 to the denitrification region D2, and a return opening 2d where the treated water returns from the denitrification region D2 to the nitrification region D1. Treated water in the nitrification region D1 circulates through the circulation plate 5 and moves via the overflow opening 2c to the denitrification region D2, and treated water in the denitrification region D2 returns to the nitrification region D1 via the return opening 2d.
Inventors:
NGUYEN THANH PHONG (JP)
WATANABE ATSUSHI (JP)
WATANABE ATSUSHI (JP)
Application Number:
PCT/JP2022/024449
Publication Date:
December 29, 2022
Filing Date:
June 20, 2022
Export Citation:
Assignee:
MAEZAWA KOGYO (JP)
International Classes:
C02F3/34; C02F1/44
Domestic Patent References:
| WO2018198422A1 | 2018-11-01 |
Foreign References:
| CN213388228U | 2021-06-08 | |||
| JP2008155080A | 2008-07-10 | |||
| JP2020075224A | 2020-05-21 |
Attorney, Agent or Firm:
TANIGAWA AND PARTNERS, PATENT FIRM (JP)
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