| 摘要 |
<p>PROBLEM TO BE SOLVED: To evenly distribute raw water to the standby lines by allowing plural lines to stand by in order when the raw water to be treated in a flow control tank is insufficient to one cycle and then starting the standby lines after confirming that the raw water in the tank corresponds to one cycle. SOLUTION: Raw water in a flow control tank 1 is pumped up by a pump P and introduced into a measuring tank 3 through an automatic mesh screen, and a necessary amt. of raw water is transferred to a batch tank 4. Raw water is aerated and agitated in the batch tank 4 to settle activated sludge, and the supernatant water is discharged. When such treatment is conducted by a prescribed cycles every day in the plural lines using plural batch tanks 4, plural lines are allowed to stand by in order for the time corresponding to one cycle when raw water in the flow control tank 1 is insufficient to one cycle, and the standby lines are started after confirming that raw water in the tank 1 is sufficient to one cycle.</p> |
