Title:
【発明の名称】間欠曝気式による活性汚泥処理方法およびその装置
Document Type and Number:
Japanese Patent JPH0665399
Kind Code:
B2
Abstract:
The present invention is concerned with an intermittent aeration type biological treatment process, wherein waste water is caused to flow into an aeration tank, and an aeration step and a stop of aeration step are alternately repeated in the aeration tank so as to treat the waste water and a system therefor. Values of concentrations of dissolved oxygen during the aeration step of the waste water in the aeration tank are continuously measured by a dissolved oxygen concentration measuring device provided in the aeration tank. Deficient values of dissolved oxygen and dissolved oxygen variation values at predetermined time intervals are calculated from the values thus measured, the deficient values and variation values are integrated and processed by an oxygen requirement value calculating - integrating operational unit to calculate an oxygen requirement value for the activated sludge in the current aeration step, and a necessary aeration time duration for the succeeding step is obtained from the value of this oxygen requirement value, to thereby control the operating time durations of the aeration device. By use of the process and the system, wasteful operating energy can be eliminated and satisfactory treated water can be obtained constantly.
More Like This:
Inventors:
Youichi Hamamoto
Application Number:
JP21065286A
Publication Date:
August 24, 1994
Filing Date:
September 09, 1986
Export Citation:
Assignee:
Nishihara Institute of Environmental Health
Nishihara OMTEC Co., Ltd.
Nishihara OMTEC Co., Ltd.
International Classes:
C02F3/12; C02F3/00; C02F3/30; G05D21/02; (IPC1-7): C02F3/12
Domestic Patent References:
| JP52114081A | ||||
| JP5551495A | ||||
| JP5849495A | ||||
| JP61129092A |
Attorney, Agent or Firm:
Hiroaki Tazawa (2 outside)
Next Patent: フォークリフトの制御装置