| 摘要 |
PURPOSE:To efficiently remove a metal ion component at a low cost in the treatment method for a dense waste liquid produced by cleaning of soldered printed circuit boards with an alkali saponifying agent. CONSTITUTION:After the oil component is removed from a dense waste liquid in a coarse granule resin tank 3, the liquid is treated with a liquid metal ion collector in a flocculation reaction tank 5. Thus, the metal ion component, especially a heavy metal ion component in the waste liquid is fixed, collected as a precipitate and then removed. |
