| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a dif which prevents sludge from flowing into an aeration pipe during the period in which diffusion is stopped with a simple equipment constitution, and thereby diffusion ports can be prevented without fail from being clogged with entering sludge. <P>SOLUTION: The aerator is provided with an aeration pipe 9 which is installed at the lower part of a submerged membrane separator 4 placed in a bioreactor 1 and sparges air into the reactor 1 through aeration ports, an air source 11 provided outside the reactor 1, an air supply pipe 10 which leads air from the source 11 to the pipe 9, a stop preventing water tank 13 which holds aeration port stop preventing water, and a normally opened electromagnetic valve 18 for making communication between the tank 13 and the pipe 10 during the period in which aeration is stopped. The tank 13 is set so that the water level in relation to the standard surface is higher than the water level in the tank 1 during the period in which aeration is performed. <P>COPYRIGHT: (C)2004,JPO</p> |
