| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a water cleaning system the equipment of which is simplified and by which surface water is agitated/mixed effectively with bottom water to improve a starved state of oxygen and changes of water pressure and/or water temperature are exerted instantaneously on phytoplankton such as water bloom existing in surface water by utilizing a water depth difference to inactivate phytoplankton so that a phenomenon of water bloom is restrained or prevented. <P>SOLUTION: An air sucking port 3 is arranged on the suction side of a water pump 1 of this water cleaning system. A suction port of the water pump is placed in the surface layer at the depth of around one meter or less below the water surface of a lake, a marsh, a river or the like to suck phytoplankton such as water bloom together with surface water and the sucked water is discharged to the bottom layer at the depth of around ten meters or deeper. As a result, phytoplankton such as water bloom is caused to receive a water pressure difference shock and/or a water temperature difference shock by utilizing the water depth difference and is inactivated to restrain the phenomenon of water bloom. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
