Final Answer:
The primary clarification process can achieve approximately 30-40% suspended solid removal without the addition of chemicals.
Step-by-step explanation:
The primary clarification process is designed to physically remove suspended solids from wastewater. This is primarily achieved through sedimentation where gravity allows heavier particles to settle at the bottom of the clarifier.
Without the addition of chemicals the process relies solely on gravity and physical properties of the particles. However its important to note that the efficiency of suspended solid removal in primary clarification is limited without chemical aids.
Chemical coagulants or flocculants are often employed to enhance particle aggregation and settling. These chemicals help create larger and heavier flocs improving the sedimentation process and achieving higher removal percentages. The role of chemical coagulants and flocculants in wastewater treatment processes and their impact on suspended solid removal efficiency.