| 摘要 |
<p>PURPOSE:To treat a large amt. of miscellaneous water with good efficiency by providing a filter medium packed bed and a water spraying vessel in the upper part of a waste water pit excavated under the ground, penetrating the miscellaneous waste water introduced into the water spraying vessel into the ambient soil partly through the filter medium packed bed and allowing the rest to fall into the pit. CONSTITUTION:A hole is opened in the ground to from a wast water pit 1, and filter media are packed in the upper part thereof through a perforated partition plate 3, whereby a filter medium packed bed 5 is made. A water spraying vessel 6 provided with water spraying holes 6a is provided at the center in the upper part of the bed 5, and the miscellaneous waste water of home is introduced into this through an inflow conduit 7. The waste water flows through the holes 6a into the bed 5, and penetrates into the ambient soil partly through the bed 5. The rest falls into the pit 1 through the plate 3. The waste water filtered by the bed 5 in the pit 1 is discharged to the outside of the pit 1, according to need, with a dipping-up pipe 8.</p> |
