| 摘要 |
<p>PURPOSE:To keep specified matters exceeding an allowable concentration from flowing down by monitoring the flow rate of underground water and specified matters to be monitored such as contaminants continuously to automatically remove the matters to be monitored. CONSTITUTION:A part of underground water to be pumped is sent to a recorder/specified matter detector 9 via a water supply pipe 10 to measure and record the concentration of individual matters. The remainder of the underground water pumped is sent to an aeration column 12 passing through a pumping pipe 11. At the column, a volatile gas is volatilized to pass through a corrector when it exceeds an allowable concentration and is discharged after it is confirmed to be below the allowable concentration. The water which passes through a filter tank 13 for filtering the specified matters via a connecting pipe 14 from the aeration column 12 is sent to the detector 9 again via a return pipe 19 from a delivery pipe 18. The concentration of each material is measured and recorded again and the water is sent to the deliver pipe 18 via a reverse return pipe 20 again. When the concentration obtained gives a value lower than all allowable concentration values of the materials, a valve 15 is changed to open and the water is sent for water injection 16 via the reverse return pipe 20 to be delivered to a location according to the purposes of application.</p> |
