JPS5678680A - Treatment for water containing fluoride ion - Google Patents

Treatment for water containing fluoride ion

Info

Publication number
JPS5678680A
JPS5678680A JP15552179A JP15552179A JPS5678680A JP S5678680 A JPS5678680 A JP S5678680A JP 15552179 A JP15552179 A JP 15552179A JP 15552179 A JP15552179 A JP 15552179A JP S5678680 A JPS5678680 A JP S5678680A
Authority
JP
Japan
Prior art keywords
water
tank
crystal seeds
ions
reaction
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
JP15552179A
Other languages
Japanese (ja)
Inventor
Yoshihiro Eto
Michiko Aso
Isao Joko
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 JP15552179A priority Critical patent/JPS5678680A/en
Publication of JPS5678680A publication Critical patent/JPS5678680A/en
Pending legal-status Critical Current

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  • Removal Of Specific Substances (AREA)

Abstract

PURPOSE: To remove fluoride ions efficiently by allowing supernatant water, obtained through solid-liquid separation after adding a water soluble calcium compound to water containing fluoride ions, to contact with crystal seeds containing calcium phosphate in the presence of phosphate ions.
CONSTITUTION: In the 1st reaction tank 1, feed water 6 containing fluoride ions, acidic solution 7 of fluoroapatite crystal, water soluble calcium hydroxide 8, and pH modifier 9 are reacted with one another, and after flocculant 10 is added CaF2 deposit 11 is removed in the 1st deposit ion tank. To supernatant water 12 of fluoride ion concentration less than the solubility of CaF2, phosphate ions 13 and crystal seeds 14 containing calcium phosphate are added and in the 2nd reaction tank 3, crystallization is carried out. Then, fluoroapatite crystallizes in the reaction solution and fluoride ions in the solution are removed. In the 2nd deposition tank 4, solid- liquid separation is made and the supernatant water is discharged as treated water 17; and some of deposited crystal seeds 18 are used as crystal seeds to be added and the other is dissolved in acid 19 in dissolution tank 5 for the 1st reaction.
COPYRIGHT: (C)1981,JPO&Japio
JP15552179A 1979-12-03 1979-12-03 Treatment for water containing fluoride ion Pending JPS5678680A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15552179A JPS5678680A (en) 1979-12-03 1979-12-03 Treatment for water containing fluoride ion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15552179A JPS5678680A (en) 1979-12-03 1979-12-03 Treatment for water containing fluoride ion

Publications (1)

Publication Number Publication Date
JPS5678680A true JPS5678680A (en) 1981-06-27

Family

ID=15607877

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15552179A Pending JPS5678680A (en) 1979-12-03 1979-12-03 Treatment for water containing fluoride ion

Country Status (1)

Country Link
JP (1) JPS5678680A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62125894A (en) * 1985-11-26 1987-06-08 Hitachi Zosen Corp Treatment of fluorine-containing waste water
FR2676727A1 (en) * 1991-05-24 1992-11-27 Hydro Azote Process for the treatment and recycling of scrubbing water for fluorine-laden gases
JP2002035765A (en) * 2000-07-21 2002-02-05 Japan Organo Co Ltd Method for removing target component from water to be treated and crystallization apparatus
JP2006255499A (en) * 2005-03-15 2006-09-28 Kurita Water Ind Ltd Fluorine-containing wastewater treatment method and apparatus
JP2007190516A (en) * 2006-01-20 2007-08-02 Kurita Water Ind Ltd Treatment method of fluorine-containing wastewater

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62125894A (en) * 1985-11-26 1987-06-08 Hitachi Zosen Corp Treatment of fluorine-containing waste water
FR2676727A1 (en) * 1991-05-24 1992-11-27 Hydro Azote Process for the treatment and recycling of scrubbing water for fluorine-laden gases
JP2002035765A (en) * 2000-07-21 2002-02-05 Japan Organo Co Ltd Method for removing target component from water to be treated and crystallization apparatus
JP2006255499A (en) * 2005-03-15 2006-09-28 Kurita Water Ind Ltd Fluorine-containing wastewater treatment method and apparatus
JP2007190516A (en) * 2006-01-20 2007-08-02 Kurita Water Ind Ltd Treatment method of fluorine-containing wastewater
JP4525601B2 (en) * 2006-01-20 2010-08-18 栗田工業株式会社 Treatment method for fluorine-containing wastewater

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