JPS5697590A - Apparatus for decontaminating filthy water containing activated sludge - Google Patents

Apparatus for decontaminating filthy water containing activated sludge

Info

Publication number
JPS5697590A
JPS5697590A JP7380A JP7380A JPS5697590A JP S5697590 A JPS5697590 A JP S5697590A JP 7380 A JP7380 A JP 7380A JP 7380 A JP7380 A JP 7380A JP S5697590 A JPS5697590 A JP S5697590A
Authority
JP
Japan
Prior art keywords
sludge
value
forecast
turbidity
zone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP7380A
Other languages
Japanese (ja)
Inventor
Nobutsugu Kato
Masami Koide
Kenji Baba
Shoji Watanabe
Shunsuke Nokita
Hitoshi Ogasawara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7380A priority Critical patent/JPS5697590A/en
Publication of JPS5697590A publication Critical patent/JPS5697590A/en
Pending legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Landscapes

  • Activated Sludge Processes (AREA)

Abstract

PURPOSE: To uniform and maintain at a constant level a sludge turbidity which is apt to change in accordance with a rapid increase or decrease of a filthy water flow amount, by increasing or decreasing a flow amount of a returned sludge corresponding to a deviation between a forecast value and a predetermined value of a sludge turbidity at the point just after a sludge reservation zone.
CONSTITUTION: A forecast value of mixed liquor suspended solid (MLSS) in a zone B is calculated on the basis of measured values by a sludge turbidity meter 30 and other flow meters. A sludge turbidity in the zone B is forecast by a controller 31, and compared with an objective value of a sludge turbidity in the zone B from a device 24. In case where the forecast value is higher than the objective value, a PID adjuster of the controller 31 is operated so as to close a control valve 35 for the returning sludge. In case where the forecast value is lower than the objective value, the PID adjuster is operated so as to open the control valve 35. In case where a sludge flow amount is between a lower reference value and an upper reference value, a returning sludge flow amount is kept at a constant level on the basis of a preset value of the device 24.
COPYRIGHT: (C)1981,JPO&Japio
JP7380A 1980-01-07 1980-01-07 Apparatus for decontaminating filthy water containing activated sludge Pending JPS5697590A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7380A JPS5697590A (en) 1980-01-07 1980-01-07 Apparatus for decontaminating filthy water containing activated sludge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7380A JPS5697590A (en) 1980-01-07 1980-01-07 Apparatus for decontaminating filthy water containing activated sludge

Publications (1)

Publication Number Publication Date
JPS5697590A true JPS5697590A (en) 1981-08-06

Family

ID=11463991

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7380A Pending JPS5697590A (en) 1980-01-07 1980-01-07 Apparatus for decontaminating filthy water containing activated sludge

Country Status (1)

Country Link
JP (1) JPS5697590A (en)

Similar Documents

Publication Publication Date Title
JPS6369595A (en) Method and device for controlling operation in intermittent-aeration activated sludge process
JPS5697590A (en) Apparatus for decontaminating filthy water containing activated sludge
ATE11461T1 (en) METHOD OF CONTROLLING THE FLUID BALANCE IN AN EVAPORATION PLANT.
US6290850B1 (en) Method for controlling aeration systems of biological tanks treating waste water
JPS5697593A (en) Apparatus for controlling sludge turbidity in aeration vessel
JPS565186A (en) Microorganism concentration controller for activated sludge in aeration tank
JPS5556895A (en) Predictive controlling method for concentration of mixed liquor suspended solid in active sludge method
JPS5592194A (en) Controlling method of returned quantity of sludge
JPS5624611A (en) Filtering discharge control device
JPS5539260A (en) Treating method for waste water with activated sludge
JPS6488722A (en) Water level controller
JPS5651217A (en) Control of cleaning of filtration basin
JPS56115687A (en) Optimum operating method for sewage treatment system by activated sludge process
JPS5753295A (en) Biological purification of waste water
JPS5742301A (en) Controlling method of condensing vessel
JPS57119894A (en) Control device for sludge
SU742385A1 (en) Device for automatic oxytank silt control
JPS56116118A (en) Water level controller
JPS56136982A (en) Method and device for controlling acid concentration of pickling solution
JPS5638173A (en) Control method for water making apparatus for ship
JPS55138115A (en) Water level control method
JPS5586587A (en) Sewage treating apparatus
JPS55114312A (en) Controlling method for sludge discharging facility of sedimentation basin
JPS5647711A (en) Measuring method for flow rate of overflow
JPS5613084A (en) Control unit of excess sludge flow rate