| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and an apparatus for recovering an anion surfactant of high purity and high concentration reusable also for the initial purpose of use, from industrial waste water which is arisen from industries where the consumption of the surfactant is large, or industrial waste water, or the like, having a low concentration of surfactant content but a high exhaust quantity which is produced in emulsion polymerization, or the like. SOLUTION: The recyclable anion surfactant of high purity and high concentration can be recovered from anion surfactant-containing waste water by a series of following processes; a separation process of adding a coagulant to the anion surfactant-containing waste water while mixing both, coagulating the anion surfactant in an aqueous solution and separating/recovering the sediment: a concentration process of subjecting the recovered sediment to water dispersion treatment under an acidic environment and increasing the content of the anion surface active agent in the sediment: a refining process of rinsing the concentrated sediment: a recovery process of adding an eluant to the rinsed sediment while mixing and stirring both, eluting the anion surfactant to an eluent phase and recovering the surfactant. COPYRIGHT: (C)2005,JPO&NCIPI
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