Why roots blower is mostly selected for sewage treatment aeration

Why roots blower is mostly selected for sewage treatment aeration

At present, more and more sewage and organic waste gas processing plants on the market lead to air pollution. Therefore, the state strictly controls the environment, and many sewage plants are closed. The sewage treatment adopts three lobe roots blower for aeration, which is used to inject oxygen into the sewage treatment tank. And continuously maintain the continuous fluidity of sewage, so as to ensure that the sewage can fully touch oxygen, and the microbial strains in the sewage can obtain air oxidation, so as to achieve the function of clearing the sewage. As an environmental protection machine often used in biological aerated filter for sewage treatment, three lobe Roots blower plays an important role in the normal operation of sewage treatment plant.

When selecting aeration equipment, it is generally determined by two main parameters: air capacity and working pressure. The amount of air capacity is determined by the design room of the biological system. Generally speaking, it is considered by adding oxygen. What is the reason for using a large number of three lobe roots blowers instead of air compressors in sewage treatment? In fact, air compressors are also used in the aeration tank, but relatively few, while three lobe roots blowers are used more. Because the pressure to be used is not very large, and the requirements for exhaust air capacity are relatively large. The working pressure is defined by the process technology, and the key is the pressure difference between the aeration head and the river surface. Generally speaking, the water level of 6m is approximately 58kPa. Compare the air compressor and roots blower from these two main parameters. The working pressure of the air compressor can meet the requirements, but the air capacity is insufficient. The air capacity of Roots blower can meet the requirements, and the main parameters of working pressure are related to the output power of mechanical equipment, which can also meet the requirements. In addition, on the premise of meeting the technical requirements, taking full account of the economic benefits, roots blower is more affordable. The ratio between air capacity and output power of air compressor is very small, which is not environmental friendly and energy-saving. Generally, the depth of water in aeration tank is not deep. Generally, three lobe Roots blower is adopted, with large air capacty, pressure can meet the requirements and save electricity.