JPS57167787A - Removing method for phosphoric acid ion - Google Patents

Removing method for phosphoric acid ion

Info

Publication number
JPS57167787A
JPS57167787A JP5247781A JP5247781A JPS57167787A JP S57167787 A JPS57167787 A JP S57167787A JP 5247781 A JP5247781 A JP 5247781A JP 5247781 A JP5247781 A JP 5247781A JP S57167787 A JPS57167787 A JP S57167787A
Authority
JP
Japan
Prior art keywords
water
treated
ions
phosphoric acid
concn
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
JP5247781A
Other languages
Japanese (ja)
Inventor
Kiyoshi Abe
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.)
Tsukishima Kikai Co Ltd
Original Assignee
Tsukishima Kikai 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 Tsukishima Kikai Co Ltd filed Critical Tsukishima Kikai Co Ltd
Priority to JP5247781A priority Critical patent/JPS57167787A/en
Publication of JPS57167787A publication Critical patent/JPS57167787A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To adsorb phosphoric acid ions on filter media by adding lime to the liquid to be treated in a settling tank to control its pH in such a way that the concn. of Ca ions comes within an unstable region thereby making a blanket zone then controlling the pH in such a way that Ca ions enter a metastable region and passing such liquid to be treated through the settling device.
CONSTITUTION: A sludge blanket type flocculating and settling device 14 having selectable tanks 10, 11 for water to be treated, a sludge outflow port 12 at the center and a treated water outflow trough 13 is provided. For example, slaked lime is added at about 200mg/l to the water in the tank 10 to control its pH to, for example, 11, so that the concn. of Ca ions come within an unstable region, thence the water is passed through the device 14 to make a blanket zone. Next, for example, about 50mg/l slaked lime is added to the water in the tank 11 to control the pH to, for example, about 8.5 so that the concn. of Ca ions enters a metastable region, thence thus water is passed through the device 14. The phosphoric acid ions in the water to be treated stick on filter media in the form of calcium hydroxyapatite and the concn. of the phosphoric acid in the treated water decreases considerably.
COPYRIGHT: (C)1982,JPO&Japio
JP5247781A 1981-04-09 1981-04-09 Removing method for phosphoric acid ion Pending JPS57167787A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5247781A JPS57167787A (en) 1981-04-09 1981-04-09 Removing method for phosphoric acid ion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5247781A JPS57167787A (en) 1981-04-09 1981-04-09 Removing method for phosphoric acid ion

Publications (1)

Publication Number Publication Date
JPS57167787A true JPS57167787A (en) 1982-10-15

Family

ID=12915797

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5247781A Pending JPS57167787A (en) 1981-04-09 1981-04-09 Removing method for phosphoric acid ion

Country Status (1)

Country Link
JP (1) JPS57167787A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01284390A (en) * 1988-05-09 1989-11-15 Kawasaki Steel Corp Treatment of phosphate-containing water

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01284390A (en) * 1988-05-09 1989-11-15 Kawasaki Steel Corp Treatment of phosphate-containing water

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