El medio ambiente en la minería

143 T. KlMURA & H. KUROKAWA 5. Emuent Treatment Thewaste water from the blowdown, fugitive gas treatment and desulphuriza– tion treatment, rain and other waste water are inducted into the eIDuent treatment. This waste water is neutralized with Ca(OH)2 and FeS04 7H20, and is oxidized as shown in Figure 14. AH heavy metals are coprecipitated and clean tail water is released to the sea. The heavy metals concentration in this released water is far below the regulated value. I Vaouu.. F:l.1~,. I .-_ ......1 ..... 1_--, T I _Preo_~P_iH~t.~I.I...... II.IU- l ;- OU~r "1 ID. Figure 15. F10wSheet of Effluent Treatment Process.