| 摘要 |
PROBLEM TO BE SOLVED: To provide a treatment method of a copper-containing solution capable of removing copper from a copper-containing solution in a high removal ratio to obtain a treated liquid low in the concentration of copper, capable of obtaining dehydrated sludge high in the concentration of formed sludge, having good dehydration properties and a high sludge dehydration speed and low content of a cake even if the concentration of sulfate ions is high and capable of reducing the production amount of sludge, and a treatment apparatus therefor. SOLUTION: The copper-containing solution L1 is introduced into a first reaction tank 1 and mixture sludge L8 of alkali and return sludge is supplied to the reaction tank 1 to react with the copper-containing solution L1 at a pH of 6-7.5 while the reaction liquid of the first reaction tank 1 is introduced into a second reaction tank 2 and adjusted to a pH of 8-11 to further react with the copper-containing solution L1. The reaction liquid of the second reaction tank 2 is introduced into a flocculation tank 3 to be flocculated and the flocculated treated liquid is subjected to solid-liquid separation treatment in a solid-liquid separation tank 4 and a part L11 of the separated sludge is returned to a mixer 5 to be mixed with alkali L6 while the obtained alkali mixed sludge L8 is supplied to the first reaction tank 1. COPYRIGHT: (C)2006,JPO&NCIPI
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