| 摘要 |
<p>PURPOSE:To automatically carry out water treatment by providing a backwashing starting pipe, a change-over vessel, and a backwashing waste water pipe, etc., and to prevent a filter layer from local cloggings and to increase the total collecting amount of suspensoid by using floating filter medium and carrying cut continuous aeration. CONSTITUTION:The device main body 1 provided with a slanted plate part 21, an aeration member 23, a floating filtration part 26, an introducing part 3 of the water to be treated, and a discharge part 5 of treated water. In a backwashing discharge pipe change-over unit, the plug 13 is provided which is opened by the ascending of the water level in a backwashing discharge pipe change-over vessel 6 and closed by the descending of the water level. The backwashing starting pipe 9 is connected to the tower bottom of main body 1 with its one end, and the other end is opened in the vessel 6 through a higher position than the highest water level in the main body 1. The siphon breaker 10 is provided one end of which is connected to the vicinity of the highest position of the backwashing starting pipe 9, and the other end is opened at the lower position than the highest water level in the main body 1. And the backwashing discharge pipe 11 is disposed one end of which is connected to the tower bottom part side of the backwashing starting pipe 9, and the other end is connected with the plug 13 of the backwashing discharge pipe change-over unit.</p> |
