| 摘要 |
PROBLEM TO BE SOLVED: To provide a crystallization reaction apparatus provided with a means for controlling the amount of raw water to be supplied and a crystallization method to use the crystallization reaction apparatus. SOLUTION: This crystallization reaction apparatus is provided with a crystallization reaction tank 1 in which a seed crystal 2 is packed so that the crystallization reaction is promoted for removing the component to be crystallized from raw water, a raw water supplying means for supplying the raw water to the tank 1, a crystallizing liquid chemical supplying means for supplying a crystallizing liquid chemical to the tank 1 and a treated water circulating means for returning at least a part of the treated water discharged from the tank 1 to the tank 1, concentration measuring means 5, 5' for measuring the concentration of the component to be crystallized in the treated water and/or that of the component to be crystallized in the raw water and raw water supply controlling means 12, 12' for controlling the amount of the raw water to be supplied to the tank 1 from the raw water supplying means.
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