Which treatment process is accompanied by the use of a blower?

The activated sludge process requires the use of a blower to supply the necessary oxygen for the microorganisms present in the aeration tanks. This treatment process relies on aeration to promote the growth of aerobic bacteria, which consume organic matter in the wastewater. The introduction of air, facilitated by blowers, enhances the microbial activity, leading to more effective breakdown of pollutants.

In contrast, other processes such as trickling filters involve a fixed bed media where wastewater passes over microorganisms that grow on the media's surface, eliminating the need for blowers. Primary clarifiers function by settling solids out of the wastewater without any biological treatment, and sand filtration relies on physical filtration rather than aeration. Therefore, the activated sludge process distinctly stands out as the treatment method that directly utilizes a blower for its operation.