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What type of treatment process focuses on the removal of suspended solids in wastewater?
Primary treatment
Tertiary treatment
Secondary treatment
Advanced treatment
The correct answer is: Primary treatment
Primary treatment primarily focuses on the removal of suspended solids in wastewater. This stage is the first step in a multi-stage wastewater treatment process where physical methods are applied to separate solids from liquids. It typically involves the use of screens and sedimentation tanks, allowing heavier solids to settle at the bottom and lighter materials to float to the surface, making it easier to remove them. This treatment is crucial because suspended solids can lead to pollution and negatively affect the treatment processes that follow. By effectively removing a significant portion of these solids, primary treatment lays the groundwork for further treatment stages, which can then focus on reducing biochemical and chemical pollutants.