WATER TREATMENT DEVICE

To provide a compact water treatment device with a low device height that does not require a powder feeder to supply magnesium oxide powder on a large-capacity reaction vessel.SOLUTION: A water treatment device 1 includes: a powder feeder 14 that supplies magnesium oxide powder; a mixing tank 16 that includes a stirrer 18 and mixes the magnesium oxide powder and water to be treated containing a substance to be removed by the stirrer 18; and a reaction tank that includes a stirrer 26 and in which the mixed solution is stirred by the stirrer 26 and the substance to be removed is adsorbed on the magnesium oxide powder. A capacity of the mixing tank 16 is smaller than a capacity of a reaction tank 24, and a liquid level of the mixing tank 16 is lower than a liquid level of the reaction tank 24, and the powder feeder 14 is located above the mixing tank 16 and supplies the magnesium oxide powder to the mixing tank 16 by gravity.SELECTED DRAWING: Figure 1 【課題】大きな容量の反応槽の上に、酸化マグネシウム粉末を供給する給粉装置を設置する必要がなく、装置高さの低いコンパクトな水処理装置を提供する。【解決手段】水処理装置１は、酸化マグネシウム粉末を供給する給粉装置１４と、撹拌機１８を備え、撹拌機１８により、酸化マグネシウム粉末と、除去対象物質を含む被処理水とを混和する混和槽１６と、撹拌機２６を備え、撹拌機２６により、前記混和液を撹拌し、前記除去対象物質を前記酸化マグネシウム粉末に吸着させる反応槽と、を有し、混和槽１６の容量は反応槽２４の容量より小さく、混和槽１６の液面位は反応槽２４の液面位より低く、給粉装置１４は、混和槽１６の上に位置し、前記酸化マグネシウム粉末を重力により混和槽１６に供給する。【選択図】図１