Title:
廃水処理システム及び廃水処理方法
Document Type and Number:
Japanese Patent JP6877255
Kind Code:
B2
Abstract:
To provide a wastewater treatment system capable of stably satisfying a water quality standard of discharged water even if there is a fluctuation in the amount of excess sludge generated, and capable of controlling ozone usage in order to obtain optimum sludge volume reduction effect.SOLUTION: According to a wastewater treatment system, a sludge withdrawal flow rate is determined based on a sludge concentration of a mixed liquid in a biological treatment tank 1 and a preset sludge treatment ratio, and ozone usage in ozone treatment is determined from a product of the sludge concentration and the sludge withdrawal flow rate. Further, based on at least one of the sludge concentration of a mixed solution and water quality data of one or more of the mixed solution, treated water W3, and discharged water W4, an appropriate sludge treatment ratio and a convergence value of the ozone injection amount are obtained, and the sludge withdrawal flow rate and ozone usage amount are adjusted to satisfy the sludge treatment ratio and the convergence value of the ozone injection amount.SELECTED DRAWING: Figure 3
Inventors:
Yoshiaki Arima
Kyohei Akedagawa
Kyohei Akedagawa
Application Number:
JP2017116488A
Publication Date:
May 26, 2021
Filing Date:
June 14, 2017
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
C02F3/12; B01F1/00; B01F3/04; C02F1/78; C02F11/06
Domestic Patent References:
| JP2007253011A | ||||
| JP9099292A | ||||
| JP2016221499A | ||||
| JP9150185A | ||||
| JP2005324111A |
Foreign References:
| US20060163155 |
Attorney, Agent or Firm:
Patent Business Corporation Parumo Patent Office
Masuo Oiwa
Takenaka Ikuo
Keigo Murakami
Kenji Yoshizawa
Masuo Oiwa
Takenaka Ikuo
Keigo Murakami
Kenji Yoshizawa