| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent clogging of an air injection port due to sludge for a long period. SOLUTION: This diffuser 11 is immersed and arranged into a reaction tank 1, and air fed from an air source under a specified pressure is diffused into the reaction tank 1. A bottom surface of a hollow rectangular box body 11a arranged in the horizontal direction, is opened and plural air injection ports 11e forming triangular notch weirs on the opening edges lid of both side surfaces 11c of the rectangular box body 11a are formed with a specified spacing.</p> |
