Application of Roots Blower in Aeration System of Activated Sludge Tank
Application of Roots Blower in Aeration System of Activated Sludge Tank
The activated sludge process is the core process of municipal sewage and industrial wastewater treatment, and the aeration system acts as the key lifeline of the entire process, directly determining the sewage treatment efficiency and effluent quality compliance rate. As the core power equipment of the aeration system, the Roots blower has become the preferred equipment for activated sludge tank aeration by virtue of its stable constant flow and high-pressure operating characteristics, and is widely used in various sewage treatment projects.
As a positive displacement air supply device, the Roots blower delivers air through the meshing rotation of three-lobe rotors, featuring stable pressure and constant air volume that are barely affected by pipe network resistance and water level fluctuations. During operation, it continuously conveys air to the microporous aeration devices at the tank bottom to generate fine bubbles, greatly expanding the air-water contact area and efficiently increasing the dissolved oxygen content in water. It provides sufficient oxygen for the metabolism of aerobic microorganisms in activated sludge, enabling the microorganisms to efficiently decompose COD, ammonia nitrogen, organic suspended solids and other pollutants in sewage, and completing the core purification process of sewage treatment.
In addition to oxygen supply, the rising airflow generated by the Roots blower drives continuous water circulation and agitation inside the tank. This fully mixes activated sludge, sewage and oxygen, prevents sludge sedimentation and accumulation, and maintains the uniform distribution of microbial flora to ensure stable and efficient biochemical reactions. Meanwhile, uniform water disturbance effectively avoids water quality stratification and local hypoxia in the tank, significantly improving the stability of sewage treatment and ensuring qualified effluent quality.
Compared with ordinary fans, Roots blowers are perfectly adapted to the 24-hour continuous operation of sewage treatment. With strong load resistance, low failure rate and simple maintenance, they are applicable to complex working conditions such as deep-water aeration and large tank aeration. Its constant air volume characteristic accurately matches the oxygen consumption demand of microorganisms, avoiding insufficient oxygen supply or excessive aeration-induced energy waste, and effectively reducing the operating cost of sewage treatment stations.
In conclusion, the Roots blower integrates multiple advantages including stable oxygen supply, uniform water agitation and energy-saving operation. It is an indispensable core piece of equipment for biochemical treatment in activated sludge tanks, providing a stable and reliable power guarantee for biochemical degradation and purification of sewage.