SIMULTANEOUS TREATMENT OF WASTE WATER CONTAINING CHROMIUM AND WASTE CONTAINING FLUORINE

摘要

PURPOSE:To permit wasteless utilization of added slaked lime by adapting in dividual removal methods of Cr and F by slaked lime to a mixture of waste liquids contg. individual elements. CONSTITUTION:After the hexad Cr in Cr-contg. waste water is reduced to trivalnt Cr, F-contg. waste water is mixed with this or after both waste water are mixed, the hexad Cr is reduced to trivalent Cr, thence slaked lime is added. Then, the Cr is settled and removed as Cr(OH)3, and the F as CaF2.