JPS5544367A - Controlling method for withdrawal of concentrated sludge - Google Patents

Controlling method for withdrawal of concentrated sludge

Info

Publication number
JPS5544367A
JPS5544367A JP11840678A JP11840678A JPS5544367A JP S5544367 A JPS5544367 A JP S5544367A JP 11840678 A JP11840678 A JP 11840678A JP 11840678 A JP11840678 A JP 11840678A JP S5544367 A JPS5544367 A JP S5544367A
Authority
JP
Japan
Prior art keywords
sludge
withdrawal
amount
thickener
level
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
JP11840678A
Other languages
Japanese (ja)
Inventor
Toshihiko Ishizaki
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP11840678A priority Critical patent/JPS5544367A/en
Publication of JPS5544367A publication Critical patent/JPS5544367A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent the rottening of sludge owing to the withdrawal of unconcentrated sludge and the excessively long detention time of sludge, by operating the amount of sludge depending on the signal produced from the interface detector for detecting the sludge level of the thickener, and by arithmetically controlling the time and the period of sludge withdrawal depending on above operated data for the amount of sludge.
CONSTITUTION: The signal produced from the sludge-water interface detector 7 for detecting the level of concentrated sludge of the thickener 1 is inputted to the arithmetic control unit 8. The unit 8 multiplies the inoutted sludge level by the inner diameter of the thickener 1 resulting in the amount of concentrated sludge. This result of operation is inputted to the withdrawal valve 4 and pump 5 as the command signal. When the specified amount of concentrated sludge is obtained through the operation, the sludge is gathered by the sludge rake 2 and is collected into the sludge pool 3, and then is withdrawn. Accordingly, in above case, it is desirable that the time of pause t2 of the sludge withdrawal is longer than the period t2' of rotation of the sludge rake 2.
COPYRIGHT: (C)1980,JPO&Japio
JP11840678A 1978-09-26 1978-09-26 Controlling method for withdrawal of concentrated sludge Pending JPS5544367A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11840678A JPS5544367A (en) 1978-09-26 1978-09-26 Controlling method for withdrawal of concentrated sludge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11840678A JPS5544367A (en) 1978-09-26 1978-09-26 Controlling method for withdrawal of concentrated sludge

Publications (1)

Publication Number Publication Date
JPS5544367A true JPS5544367A (en) 1980-03-28

Family

ID=14735850

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11840678A Pending JPS5544367A (en) 1978-09-26 1978-09-26 Controlling method for withdrawal of concentrated sludge

Country Status (1)

Country Link
JP (1) JPS5544367A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59169599A (en) * 1983-03-17 1984-09-25 Japan Organo Co Ltd Biological waste water disposal
US7273988B2 (en) 2002-04-22 2007-09-25 Nec Corporation Wiring board, and electronic device with an electronic part mounted on a wiring board, as well as method of mounting an electronic part on a wiring board
JP2012035221A (en) * 2010-08-10 2012-02-23 Sumitomo Heavy Industries Environment Co Ltd Apparatus for flocculation and precipitation treatment and method for flocculation precipitation treatment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59169599A (en) * 1983-03-17 1984-09-25 Japan Organo Co Ltd Biological waste water disposal
JPH0243559B2 (en) * 1983-03-17 1990-09-28
US7273988B2 (en) 2002-04-22 2007-09-25 Nec Corporation Wiring board, and electronic device with an electronic part mounted on a wiring board, as well as method of mounting an electronic part on a wiring board
JP2012035221A (en) * 2010-08-10 2012-02-23 Sumitomo Heavy Industries Environment Co Ltd Apparatus for flocculation and precipitation treatment and method for flocculation precipitation treatment

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