| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an apparatus and a method for treating phosphoric acid-containing water which can improve the recovery rate of phosphoric acid in water to be treated, and reduce the water content of sludge containing calcium phosphate. Ž<P>SOLUTION: The apparatus 1 for treating phosphoric acid-containing water comprises: a reaction tank 10 for making the water to be treated containing phosphoric acid react with a calcium agent to generate calcium phosphate, a separation tank 12 for separating the calcium phosphate and the treated water generated in the reaction tank 10; an acid treatment tank 14 for treating at least a part of the calcium phosphate, separated in the separation tank 12, at pH of 3-4.5; and a transfer portion 30 for transferring the calcium phosphate treated in the acid treatment tank 14 to the reaction tank 10. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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