From the biological selection theory to explain why the mixed aeration tank than push-flow aeration tank is more tolerant of

1. Push-flow aeration tank: generally a rectangular aspect ratio of 5 ~ 10, the effective depth of 3 ~ 9 meters. In order to save floor space is generally built into two or more folds. Push-flow type aeration pool more than the use of blast aeration. More for the treatment of wastewater with more stable water quality, to deal with this type of water quality is more suitable.

2. Completely mixed: completely mixed aeration tank is generally round, the aeration device more surface aeration, the aerator is placed in the center of the aeration tank platform, the sewage into the mixing center immediately after the mixing with the warehouse pool mixture, the warehouse pool of sludge loading and oxygen consumption rate and microorganisms such as the types of performance is exactly the same, not like the push-flow type aeration tank as the upper and lower streams have a clear distinction. Due to the dilution effect of the original mixture of the aeration tank on the influent water, completely mixed aeration tank has a stronger ability to withstand shock loads. Load uniformity makes it easy to balance the oxygen supply and demand. Thus saving oxygen capacity.

3. Two types of flow combined with the aeration tank: in the push-flow aeration tank, a series of surface aerators can be used in tandem with oxygenation and mixing, so that in each surface aerator around the flow is completely mixed, and for the silo pool, the flow has the nature of push-flow.