JPS5477452A - Method of controlling supply of flocculant - Google Patents

Method of controlling supply of flocculant

Info

Publication number
JPS5477452A
JPS5477452A JP14389777A JP14389777A JPS5477452A JP S5477452 A JPS5477452 A JP S5477452A JP 14389777 A JP14389777 A JP 14389777A JP 14389777 A JP14389777 A JP 14389777A JP S5477452 A JPS5477452 A JP S5477452A
Authority
JP
Japan
Prior art keywords
flocculant
basins
flocculant feeding
future
reference value
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.)
Granted
Application number
JP14389777A
Other languages
Japanese (ja)
Other versions
JPS6043165B2 (en
Inventor
Takashi Ikeguchi
Tetsuro Haga
Shunsuke Nokita
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 JP14389777A priority Critical patent/JPS6043165B2/en
Publication of JPS5477452A publication Critical patent/JPS5477452A/en
Publication of JPS6043165B2 publication Critical patent/JPS6043165B2/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5209—Regulation methods for flocculation or precipitation

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Abstract

PURPOSE:To provide a method capable of feeding flocculant effectively, by considering the flocculant feeding rate in one system out of at least three treating systems in which turbidity of waste water to be treated is lowest as a reference value, and controlling the flocculant feeding rates of the other two systems in the manner that the flocculant feeding rate of one system is higher than the reference value by a predetermined amound whereas that of the other system is lower than the reference value by a predetermined amount. CONSTITUTION:Waste water to be treated is carried to valve 5 via sand settling basin or others and introduced into mixing basins 6A-6C where flocculant is mixed to the waste water. Then, it is carried to flocculating basins 7A-7C and settling basins 8A-8C. On the other hand, by means of arithmetic unit 15, flocculant feeding rates DA-C in the future are determined from turbidity TA- C at the outlet of settling basins 8A-8C measured respectively by turbidity meters 13A- 13C and flocculant feeding rates at the present. Providing that TB is minimal, flocculant feeding rate DB' in the future is kept equal to that DB at the present. Here, if DA is smaller than DC, flocculant feeding rates DA', DC' of systems A, C in the future are controlled to be DA'=DB-beta, DC'=DB+alpha. On the contrary, if DA is larger than DC, DA'=DB+alpha, DC'=DB-beta.
JP14389777A 1977-12-02 1977-12-02 Coagulant injection control method Expired JPS6043165B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14389777A JPS6043165B2 (en) 1977-12-02 1977-12-02 Coagulant injection control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14389777A JPS6043165B2 (en) 1977-12-02 1977-12-02 Coagulant injection control method

Publications (2)

Publication Number Publication Date
JPS5477452A true JPS5477452A (en) 1979-06-20
JPS6043165B2 JPS6043165B2 (en) 1985-09-26

Family

ID=15349589

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14389777A Expired JPS6043165B2 (en) 1977-12-02 1977-12-02 Coagulant injection control method

Country Status (1)

Country Link
JP (1) JPS6043165B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05168819A (en) * 1991-12-26 1993-07-02 Hitachi Plant Eng & Constr Co Ltd Method for purifying water and device therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05168819A (en) * 1991-12-26 1993-07-02 Hitachi Plant Eng & Constr Co Ltd Method for purifying water and device therefor

Also Published As

Publication number Publication date
JPS6043165B2 (en) 1985-09-26

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