TREATMENT OF FLUORINE-CONTAINING WATER

摘要

PURPOSE:To efficiently treat fluorine-containing water in a system wherein low concn. fluorine-containing water and high concn. fluorine-containing water are discharged. CONSTITUTION:Low concn. fluorine-containing water and high concn. fluorine- containing water are fractionally treated. The low concn. fluorine-containing water is subjected to fluorine adsorbing treatment in an adsorbing tower 1 and the high concn. fluorine-containing water is mixed with the regenerated waste water of the adsorbing tower 1 to receive the addition of a calcium compound (pipings 21, 22) and subjected to flocculation treatment (reaction tanks 2, 4) and solid-liquid separation treatment (sedimentation tanks 3, 5). By this constitution, the low concn. fluorinecontaining water and the high concn. fluorine-containing water can be fractionally treated without being mixed to be respectively subjected to the optimum treatments. High purity treated water is easily obtained by the adsorbing treatment of the low concn. fluorine-containing water. Efficient treatment is performed by the flocculation and solid-liquid separation treatment of the high concn. fluorine-containing water and the regenerated waste water to obtain high concn. fluorine-containing sludge. The regenerated waste water of the adsorbing tower can be simultaneously treated and this method is extremely advantageous industrially.