| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a sewage treating method capable of continuously operating plural filtering units and also capable of preventing the deterioration of water quality of treated water. SOLUTION: In the sewage treating method in which the sewage is supplied to a sewage treating equipment provided with a biological reaction tank 1, plural filtering units 3 (31-37) immersed and arranged along the inflow direction of the sewage and in which at least one part of a periphery wall consists of a water permeable supporting body inside the tank 1, a scattering pipe for washing provided downward of a scattering pipe filtering unit 3 provided at the lower part of the biological reaction tank 1 and a waste water tank having a water level lower than that of a biological reaction tank 2, the treated water is taken out from the filtering unit 3, the filtering unit 3 is washed alternately, and also the treated water in a filtering unit adjacent to the filtering unit to be washed is discharged to the waste water tank.</p> |
