| 摘要 |
PROBLEM TO BE SOLVED: To provide a septic tank drainage treatment system capable of curbing a running cost by reducing operating time of a pump device when treating drainage discharged from a septic tank.SOLUTION: A pump tank 20 has a pump device 25 and a water level detection device 27 provided with liquid surface detection units 27A and 27B arranged at different heights from each other. When a water level inside the pump tank 20 increases and reaches the liquid surface detection unit 27A at a high water level side, the pump device is turned from a non-drive state to a drive state. When the liquid surface detection unit 27B at a low water level side detects that the water level reaches the same, the pump device 25 is turned from the drive state to the non-drive state. |
