| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method of operating a nitrification tank which operates a nitrification tank where nitrogen-containing wastewater is nitrified by nitrifying bacteria, and enables the start-up of a newly start-up nitrification tank in a short time. <P>SOLUTION: Microorganism-immobilized carriers to which nitrifying bacteria-containing sludge has adhered are taken out from a nitrification tank in operation, and the taken out microorganism-immobilized carriers are washed with a solution capable of maintaining the nitrifying bacteria in a high activity state. The washing solution containing the sludge is recovered, and new microorganism-immobilized carriers are impregnated with the washing solution, thereby making the nitrifying bacteria-containing sludge adhere to the microorganism-immobilized carriers. The microorganism-immobilized carriers are filled in a new nitrification tank to be subjected to start-up operation, and then the start-up operation of the new nitrification tank is performed. The washed microorganism-immobilized carriers are refilled in the original nitrification tank to continue the operation of the original nitrification tank. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
