JPS57167787A - Removing method for phosphoric acid ion - Google Patents
Removing method for phosphoric acid ionInfo
- 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
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01284390A (en) * | 1988-05-09 | 1989-11-15 | Kawasaki Steel Corp | Treatment of phosphate-containing water |
-
1981
- 1981-04-09 JP JP5247781A patent/JPS57167787A/en active Pending
Cited By (1)
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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