| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a treatment method and a treatment apparatus capable of removing fluorine from wastewater or the like with a high fluorine concentration to below a drainage standard value or to an environmental standard value in a short time at low cost, and also capable of removing a harmful substance or the like also at the same time. <P>SOLUTION: The treatment method and treatment apparatus include: a primary treatment process in which a calcium salt is added to raw water including fluorine, calcium fluoride sedimentation is generated, and the sedimentation is performed with solid-liquid separation; and a secondary treatment process in which a poor solubility metal oxide and a soluble metal compound are added to the treated water (primarily treated water) after the primary treatment and are made to react under alkaline, thereby sludge in which a layered double hydroxide is formed on the surface of the poor solubility metal oxide is generated, the sludge is precipitated, and is performed with solid-liquid separation. <P>COPYRIGHT: (C)2013,JPO&INPIT |
