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<br /> <br />available many companies choose to treat pond water bleed into <br />a polishing pond prior to dischazge to the environment <br />Typical plant results for barren or pond treatment arC <br />summarized in Tables 2 and 3. In all these operations a singld <br />rracdon tank is usually used with the same design criteria as <br />used for pulp treatment. <br />Table 2: Barren Solution Treatment Results <br />• Feed (mg/L) <br />• Treated Barren (mg/L) <br />100 - 500 CNr <br />10-50 Cu <br />10-25Zn <br />0-50 Fe <br />0.1 - 5 CNr <br />0.1-SCu <br />0.1 - 0.5 Fe <br />• Reagents <br />3 - 5 g SOa/g CNr <br />4-7glime/g CNr <br />0 - 20 mg/L Cu2+ <br />Table 3: Pond Water Treatment Results <br />• Feed (mg/L) 2 - 100 CNr <br />0.3 - 20 Cu <br />0-lONi <br />0.1-1Zn <br />• Treated Pond (mg/L) <br />0.1 - 0.5 CNr <br />0.1 - 0.3 Cu <br />0.1 - OS Ni <br />0.1 - 0.5 Zn <br />0.1 - 0.2 Fe <br />• Reagents <br />3 - 5 g SOa/g CNr <br />4-7glime/gCNr <br />0 - 5 mg/L CuZ` <br />4 <br />