| 摘要 |
PROBLEM TO BE SOLVED: To provide a biological waste water treatment method which is used for treating waste water (raw water) containing organic matter and ammonia nitrogen or only ammonia nitrogen and in which an ANAMMOX (anaerobic ammoxidation) reaction is utilized which has a high denitrification rate and is applicable to high-concentration waste water. SOLUTION: The biological waste water treatment method, in which the waste water (raw water) containing organic matter and ammonia nitrogen is treated, comprises the steps of: decomposing organic matter in raw water by utilizing an oxidation reaction of an aerobic microbe and oxidizing a part of ammonia nitrogen by utilizing a biological oxidation reaction of a nitrosomonas to convert it into nitrous acid in a primary treatment tank (1); separating solids from the primarily treated water in a precipitation tank; and introducing the solid-removed primarily treated water into a secondary treatment tank (2), in which the sludge activated under an anaerobic ammoxidation condition for a long period of time is thrown beforehand, to denitrify nitrite nitrogen and the remainder of ammonia nitrogen in the solid-removed primarily treated water. COPYRIGHT: (C)2007,JPO&INPIT
|
