| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain treatment water of high quality reducing the using amount of an iron medicine and a sludge generation amount in a Fenton oxidation treatment for hard-biodegradable organic matter-containing water, and further, improving the dewaterability of sludge.SOLUTION: Hydrogen peroxide and an iron medicine by 0.005 to 0.2 molar time quantity of the amount of the hydrogen peroxide are added to hard-biodegradable organic matter-containing water, reaction is caused at pH 2 to 4 for 1 hr or more, thereafter, an alkali agent is added to oxidation treatment water to generate an insolubilization material, and the produced insolubilization material is subjected to solid-liquid separation. Alkali mixed sludge obtained by adding and mixing the alkali agent into a part of the separated sludge obtained in the solid-liquid separation stage is added at least as a part of an alkali agent added to oxidation treatment water in an insolubilization stage.</p> |
