Method of oil-water separating emulsified oil wastewater containing a non-ionic surfactant

摘要

PURPOSE:To separate and remove oil content efficiently from the drain of emulsified oil containing nonionic surface-active agent by adding a specific substance as an oil-water separating agent to said drain and then electrolyzing with a solvent electrode. CONSTITUTION:A substance constituting with one or mixture of the three groups, namely a first group constituting with a compound containing aromatic family core such as tannic acid or the like, and carboxyl, sulfone, and the like, a second group constituting with a water soluble high-molecular compound containing carboxyl and sulfone such as polyacrylic sodium or the like, and a third group constituting with anion surface-active agent such as alkyl benzene sulfone acid sodium and the like, is added to emulsified oil drain containing nonionic surface-active agent as oil-water separating agent, mixed and solved sufficiently. Then, as electrode, a soluble electrode is applied to electrolyze said drain. An adequate adding quantity of oil-water separating agent is usually within a range of several to tens of ppm against 1,000ppm or concentration of emulsified oil.