| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for separating and removing fluorine from waste water containing fluorine such as waste water generated by scrubbing smoke. SOLUTION: Powdery activated alumina is added and mixed to waste water to be treated containing fluorine as an adsorbent of a fluorine compound, and later the added activated alumina is separated by using a clarification sand filter. PH of the filtrate is preferred to prepare it in a range of 4.5 to 7 by adding a flocculant. As the flocculant, aluminum sulfate or polyaluminum chloride is preferred. Also, as the clarification sand filter, an upward counter flow current moving bed type sand filter is preferred. This method is useful to treatment of waste water generated by scrubbing smoke discharged from a waste incineration plant, etc.
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