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JPS57153707A - Apparatus for controlling precipitation basin - Google Patents

Apparatus for controlling precipitation basin

Info

Publication number
JPS57153707A
JPS57153707A JP3650781A JP3650781A JPS57153707A JP S57153707 A JPS57153707 A JP S57153707A JP 3650781 A JP3650781 A JP 3650781A JP 3650781 A JP3650781 A JP 3650781A JP S57153707 A JPS57153707 A JP S57153707A
Authority
JP
Japan
Prior art keywords
sludge
value
concn
precipitation basin
overflowed
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
JP3650781A
Other languages
Japanese (ja)
Inventor
Shoji Watanabe
Kenji Baba
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 JP3650781A priority Critical patent/JPS57153707A/en
Publication of JPS57153707A publication Critical patent/JPS57153707A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To properly control a total sludge amount in a processing system without suspending sludge in overflowed water by controlling the withdrawing amount of a precipitated solid substance corresponding to the detected value of turbidity in clarified water overflowed from a precipitation basin.
CONSTITUTION: The sludge concn. S of an overflowed water 3 is measured by a densitometer 10 and applied to a controle circuit 11 and the tolerance value Sc of the sludge concn. is applied to said control circuit 11 by a setting device 12. When a measured value S is reached to the set value Sc or more, a withdrawing pump 13 is driven and, when said value S is reached to the set value Sc or less, said pump 13 is stopped. By this operation, sludge is prevented from being flowed out from a precipitation basin 1 and calrified overflowed water can be always supplied as well as good sludge interface position is maintained to be able to secure the sludge required in the precipitation basin 1. Because excessive sludge with a high concn. can be obtained in a low flow amount, the load of a sludge treating process can be reduced.
COPYRIGHT: (C)1982,JPO&Japio
JP3650781A 1981-03-16 1981-03-16 Apparatus for controlling precipitation basin Pending JPS57153707A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3650781A JPS57153707A (en) 1981-03-16 1981-03-16 Apparatus for controlling precipitation basin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3650781A JPS57153707A (en) 1981-03-16 1981-03-16 Apparatus for controlling precipitation basin

Publications (1)

Publication Number Publication Date
JPS57153707A true JPS57153707A (en) 1982-09-22

Family

ID=12471736

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3650781A Pending JPS57153707A (en) 1981-03-16 1981-03-16 Apparatus for controlling precipitation basin

Country Status (1)

Country Link
JP (1) JPS57153707A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006090791A1 (en) * 2005-02-23 2006-08-31 Ebara Corporation Slaked-lime injection device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006090791A1 (en) * 2005-02-23 2006-08-31 Ebara Corporation Slaked-lime injection device

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