| 摘要 |
PROBLEM TO BE SOLVED: To provide a sewage septic tank which facilitates the examination of a piping structure during design and workability during maintenance management by simplifying an air piping structure in the septic tank. SOLUTION: The septic tank comprises an air blower, main air piping connected to the air blower and branched air piping for transferring air supplied from the main air piping to a necessary place wherein an air distribution device is provided so as to be disposed over the upper parts of a plurality of chambers partitioned by a partition wall in the middle of transfer of air from the main air piping to the branched air piping. COPYRIGHT: (C)2006,JPO&NCIPI
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