| 摘要 |
1. Device for biological cleaning of sewer water, with a rotatable drum shaped immersion trickling body which comprises a plurality of channels circumscribed by walls intended for supporting the biological grass, which immersion trickling body is composed of elongated, prefabricated, bundlewise collected individual elements forming the channel walls, which are arranged such that the longitudinal center line of every channel extends in a tangential plane extending parallel of the axis of rotation of the immersion trickling body, characterized in that every individual element is a plastic tube which comprises at both ends a sleevelike enlarged section having an irregular extent of the outer jacket allowing a mutual locking against an axial shifting. |
