| 摘要 |
PROBLEM TO BE SOLVED: To provide a treatment method of fluorine-containing waste water in which a fluorine concentration in the fluorine-containing waste water can be reduced sufficiently and by low cost.SOLUTION: A Ca source and a Cu source are added to fluorine-containing waste water (or the Ca source is added to the fluorine-containing waste water including Cu), and a ratio (Cu/F) of a Cu concentration to an F concentration in the fluorine-containing waste water is at least 0.08, a ratio (Ca/F) of a Ca concentration to an F concentration is at least 1, (a pH is optionally regulated to 5-11 by the addition of a pH adjuster), and the fluorine-containing waste water is retained while being stirring, then generated sludge is subjected to sedimentation and separation. |
