好氧菌的生存，必须有足够的氧气，即污水中有足够的溶解氧，以达到生化处理的目的。好氧池空气由风机提供，池内采用新型弹性立体填料，该填料表面积比大、使用寿命长、易挂膜、耐腐蚀，池底采用旋混式曝气器，使溶解氧的转移率高，同时有重量轻、不老化、不易堵塞、使用寿命长等优点。接触池气水比在12：1左右。（0.5-5m³/h接触池为二级）。
The survival of aerobic bacteria must have enough oxygen, that is, enough dissolved oxygen in sewage to achieve the purpose of biochemical treatment. Aerobic pool air is provided by fan. A new type of elastic three-dimensional filler is used in the pool. The filler has large surface area ratio, long service life, easy film hanging and corrosion resistance. Rotary mixing aerator is used at the bottom of the pool, which makes the transfer rate of dissolved oxygen high. At the same time, it has the advantages of light weight, non-aging, non-blocking and long service life. The air-water ratio of the contact tank is about 12:1. (0.5-5m & sup3; / h contact pool is secondary).