| 摘要 |
PURPOSE:To treat effectively high-COD concn. waste water by adopting the Fenton oxidation as the pretreatment wherein the addition of hydrogen peroxide and an iron salt is purposely reduced and using a simple method wherein a flocculation and separation vessel, sludge treating equipment, etc., can be dispensed with. CONSTITUTION:Waste water contg. org. matter is oxidized in the presence of hydrogen peroxide and a ferrous salt and then treated with activated sludge. In this waste water treatment, hydrogen peroxide less than the COD and Mn to be removed in waste water and a ferrous salt, 1/70-1/7 of the amt. of COD and Mn to be removed (expressed in terms of ferrous ions), are added to waste water. Waste water is then regulated at 1.0-2.0pH, oxidized at 5-95 deg.C for 3-8hr, neutralized with an alkali and then treated with activated sludge. Namely, high-COD concn. waste water contg. org. matter can be treated even by the addition of a small amt. of hydrogen peroxide and a ferrous salt. Since the sludge of iron salts is not generated during the treatment, a flocculation and separation vessel, sludge treating equipment, etc., can be dispensed with.
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