Patent ID: 6495050
Filing Date: 2002-12-17
Classification: C02F,Y10S

Abstract:
A treating method for treating a water to be treated containing a soluble manganese and carbonic acid ions by removing manganese therefrom, said method comprising the steps of:passing the water to be treated as an upward flow through a fluidized bed reaction tower having no support bed but a fluidized bed of which fluidizing medium is manganese sand; adjusting a pH value of the water to be treated in said fluidized bed so that the pH value of the water to be treated is within a proper range to crystalize manganese carbonate of the water to be treated; forming a sludge layer of suspended solid above said fluidized bed so that suspended solid including suspended manganese passed through the fluidized bed is captured by the sludge layer of suspended solid; and removing the sludge layer of suspended solid having captured the suspended solid; whereby a suspended manganese is removed together with the soluble manganese in the water to be treated.