| 摘要 |
PROBLEM TO BE SOLVED: To provide a wastewater treating apparatus and a waste water treating method by which wastewater can be favorably treated in treatment of the wastewater containing ammonia nitrogen and alkaline earth metal ions. SOLUTION: The wastewater treating apparatus 10 is provided with: a nitrification tank 11 which converts ammonia nitrogen to nitrite nitrogen; an intermediate treatment tank 12 which removes the alkaline earth metal ions from treated water 2 of the nitrification tank 11; an ammonia denitrification tank 13 which removes ammonia nitrogen and nitrite nitrogen from treated water 3 of the intermediate treatment tank 12; a microorganism carrier which is charged in the ammonia denitrification tank 13 and on which autotrophic denitrifying bacteria utilizing ammonia nitrogen as a hydrogen donor and nitrite nitrogen as a hydrogen acceptor are stuck and immobilized; pH measuring means 16a, 16b which measure pH of the nitrification tank 11 and the intermediate treatment tank 12; and pH adjusting means 14, 15 which adjust pH of the nitrification tank 11 between 6.0 and 7.0 and pH of the intermediate treatment tank 12 between 8.5 and 9.5. COPYRIGHT: (C)2012,JPO&INPIT |
