FLUORINE OR PHOSPHORUS-CONTAINING WATER TREATMENT EQUIPMENT

PROBLEM TO BE SOLVED: To provide a fluorine or phosphorus removing agent or a removing method which can efficiently remove fluorine and/or phosphorus. SOLUTION: Raw water is introduced into a metal reaction tank 10, and an insolubilizing agent is added thereto and mixed. Thereby, metal compounds and fluorine or phosphorus are insolubilized. The insolubilized material is coarsened in a flocculation tank 12, and settled and separated in a settling tank 14. Besides a zirconyl chloride aqueous solution, other Zr compounds and water-soluble metal compounds of Ti, Hf, V, Nb, Ta, and rare earth metals (for example, Ce and La) can be used as the insolubilizing agent. COPYRIGHT: (C)2004,JPO