Explain the physical process of sewage treatment.

Explanation

### Step-by-Step Solution for the Physical Process of Sewage Treatment

1. **Introduction to Sewage Treatment**:
- Sewage treatment is a multi-step process that aims to remove contaminants from wastewater. It typically involves three main processes: physical, biological, and chemical treatment. Here, we will focus solely on the physical process.

2. **Screening**:
- The first step in the physical process is screening. This involves passing the sewage through screens to remove large debris such as sticks, leaves, and plastic items. This step helps to protect the equipment used in subsequent treatment processes.

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