| 摘要 |
A wastewater treatment system 1 comprises an outer tank 10 which is open at one end and an inner aeration chamber 20 mounted within the outer tank during use, which is open at opposing ends. The outer tank generally increases in internal diameter towards its open end and has substantially no internal structure so as to be intimately stackable with other substantially identical outer tanks for its entire length. The inner aeration chamber generally increases in diameter from a first end to a second opposing end and has substantially no internal or external structures projecting away from the walls of the aeration chamber intermediate the first and second end, so as to be intimately stackable with other substantially identical aeration chambers for its entire length. Transportation of a plurality of wastewater treatment systems is efficient because of the stackability of the component parts. The system may also include a cover 15 adapted to close the open end of the outer tank. The system can also include a draft tube 25 with a diffuser assembly (27, 28, Fig. 3). |
