JPS5549189A - Treatment method of waste water containing fluoride ion - Google Patents

Treatment method of waste water containing fluoride ion

Info

Publication number
JPS5549189A
JPS5549189A JP12271078A JP12271078A JPS5549189A JP S5549189 A JPS5549189 A JP S5549189A JP 12271078 A JP12271078 A JP 12271078A JP 12271078 A JP12271078 A JP 12271078A JP S5549189 A JPS5549189 A JP S5549189A
Authority
JP
Japan
Prior art keywords
waste water
fluoride ions
water
soluble
caco
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
JP12271078A
Other languages
Japanese (ja)
Inventor
Kazumi Yagishita
Yukio Ito
Yoshihiro Eto
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.)
Kurita Water Industries Ltd
Original Assignee
Kurita Water Industries 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 Kurita Water Industries Ltd filed Critical Kurita Water Industries Ltd
Priority to JP12271078A priority Critical patent/JPS5549189A/en
Publication of JPS5549189A publication Critical patent/JPS5549189A/en
Pending legal-status Critical Current

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  • Removal Of Specific Substances (AREA)

Abstract

PURPOSE: To greatly reduce the fluoride ion concentration, by adding water-soluble Ca compound to waste water containing fluoride ions, removing produced CaF2 be settling, and adding CO2-containing gas or water-soluble carbonate.
CONSTITUTION: Water-soluble Ca compound such as Ca(OH)2, CaO, and CaCl2 is added to industrial waste water containing fluoride ions by 2W3 times equivalent of fluoride ions. At this time, the pH of the waste water should be adjusted to 6 or more by using acid or alkali. Fluoride ions in the waste water mostly precipitate and sediment as CaF2, which is removed by filtering. Filtering separation may be easily when a proper high molecular coagulant is added at this time. Next, a gas containing CO2, or a water-soluble carbonate such as CaCO3, K2CO3, (NH4)2CO3 is added to form sedimentation of CaCO3. Residual traces of fluoride ions are taken in or adsorbed by CaCO3 to be removed, so that the concentration of fluoride ions in the waste water may be securely reduced to 5ppm. or less. At this time, the pH of waste water is adjusted to 8W11, and the removal rate of fluoride ions may be increased.
COPYRIGHT: (C)1980,JPO&Japio
JP12271078A 1978-10-06 1978-10-06 Treatment method of waste water containing fluoride ion Pending JPS5549189A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12271078A JPS5549189A (en) 1978-10-06 1978-10-06 Treatment method of waste water containing fluoride ion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12271078A JPS5549189A (en) 1978-10-06 1978-10-06 Treatment method of waste water containing fluoride ion

Publications (1)

Publication Number Publication Date
JPS5549189A true JPS5549189A (en) 1980-04-09

Family

ID=14842683

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12271078A Pending JPS5549189A (en) 1978-10-06 1978-10-06 Treatment method of waste water containing fluoride ion

Country Status (1)

Country Link
JP (1) JPS5549189A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100318661B1 (en) * 1998-12-30 2002-11-22 (주)니드켐 Wastewater treatment agent and its treatment method
JP2003080270A (en) * 2001-09-12 2003-03-18 Okutama Kogyo Co Ltd Method for treating fluorine-containing waste water

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS525783A (en) * 1975-06-30 1977-01-17 Furukawa Electric Co Ltd:The Method for preparing poly(hydroxyalkyl) isocyanurate
JPS5285095A (en) * 1976-01-09 1977-07-15 Mitsubishi Metal Corp Treatment of f-contg. ammoniac waste liquor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS525783A (en) * 1975-06-30 1977-01-17 Furukawa Electric Co Ltd:The Method for preparing poly(hydroxyalkyl) isocyanurate
JPS5285095A (en) * 1976-01-09 1977-07-15 Mitsubishi Metal Corp Treatment of f-contg. ammoniac waste liquor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100318661B1 (en) * 1998-12-30 2002-11-22 (주)니드켐 Wastewater treatment agent and its treatment method
JP2003080270A (en) * 2001-09-12 2003-03-18 Okutama Kogyo Co Ltd Method for treating fluorine-containing waste water

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