| 摘要 |
<p>PURPOSE:To enable building of the inter-gravel contact purifying weir which is not limited in water basins by providing an outlet with a water draining means. CONSTITUTION:This purifying weir is composed of an intake 2 which is formed atop a structural body 1a, the outlet 3 which is formed on its flank and filter beds 5 which are formed in a water course 4 from the intake 2 to the outlet 3 and are packed with gravel. The outlet 3 is provided with the water draining means 6. A bubble generating means B1 consisting of an air conduit and a nozzle member 9 successively placed to this air conduit is installed to the discharge side of a submersible pump.</p> |
