Explain the function of bar screens in a wastewater treatment plant.

Explanation

### Step-by-Step Solution

1. **Definition of Bar Screens**: Bar screens are a type of filtration device used in wastewater treatment plants. They consist of a series of parallel bars that create a barrier to block large objects from passing through.

2. **Function of Bar Screens**: The primary function of bar screens is to filter out large debris from wastewater. This is the first step in the wastewater treatment process.

3. **Types of Debris Removed**: Bar screens are effective in removing large rubbish items such as rags, toys, sticks, and other large objects that could interfere with the treatment process.

...