Which of the following is the primary function of a primary clarifier in wastewater treatment?

The primary function of a primary clarifier in wastewater treatment is to remove solids from the wastewater. During the treatment process, the primary clarifier plays a crucial role in separating suspended solids from liquid waste. As wastewater enters the clarifier, it allows for sedimentation, where heavier solids settle to the bottom, forming what is known as primary sludge. This process not only reduces the amount of solid material in the water but also helps to clarify the effluent that is discharged from the clarifier.

While other processes in wastewater treatment may address odor, grease, or nutrients, the clarifier's primary purpose is focused on the removal of suspended and settleable solids. This is essential for reducing the load on subsequent treatment processes, such as biological treatment, and is a fundamental step in ensuring water quality in the overall treatment system.