| 摘要 |
A grid-type aeration system with diffusers mounted and spaced longitudinally along air distribution conduits (74, 76) that are submerged in waste water and secured to and above the floors of the aeration tanks. The conduits (74, 76) are provided with couplings (70) having first and second matingly compatible coupling sections (78, 83) made of synthetic polymer material. The conduits (74, 76) each having a respective conduit receiver (79, 84) and one of said receivers having at least one locking projection (91) and the other conduit receiver having a corresponding locking receptacle (92) with a sealing member (88) being provided between the conduit receivers (79, 84). The coupling (70) further contains a retainer (96) for urging the coupling sections (78, 83) together. |
