Physical removal of large and small particle from the sewage through filtration and sedimentation is called

Options

A. Primary treatment
B. Secondary treatment
C. Tertiary treatment
D. Biological treatment

Answer

The question asks about the physical removal of large and small particles from sewage through filtration and sedimentation. This process is commonly known as "sewage treatment" or more specifically, "primary treatment" in the context of wastewater management.

### Step-by-Step Solution:

1. **Understanding Sewage Treatment**: Sewage treatment is a process designed to remove contaminants from wastewater or sewage. It typically involves several stages, including physical, biological, and chemical processes.

2. **Identifying Physical Processes**: The physical removal of particles from sewage primarily involves two methods: filtration and sedimentation. Filtration involves passing the sewage through a filter that traps solid particles, while sedimentation involves allowing heavier particles to settle at the bottom of a tank.

3. **Defining the Process**: The combination of filtration and sedimentation is referred to as "primary treatment." This is the first step in the sewage treatment process, where large solids are removed before any biological treatment occurs.

4. **Conclusion**: Therefore, the answer to the question is that the physical removal of large and small particles from sewage through filtration and sedimentation is called "primary treatment."

### Final Answer:
The physical removal of large and small particles from sewage through filtration and sedimentation is called **primary treatment**.