________ filters are used by most plants.

Rapid sand filters are commonly used in water treatment plants due to their efficiency in removing suspended solids and impurities from water. These filters operate by allowing water to flow through a layer of sand, where particles are trapped. The design of rapid sand filters facilitates a continuous flow of water, making them effective for large volumes, which is essential in municipal water treatment processes.

Rapid sand filters are typically favored because they can treat water at a higher rate compared to other filtration methods, such as gravity or pressure filters, which may not be as effective for high-demand situations. They also require less frequent backwashing and maintenance than some other types of filters, enhancing operational efficiency and lowering costs for plants. Additionally, they can be adapted to various treatment processes, making them versatile in addressing different kinds of water quality issues.

This combination of efficiency, effectiveness, and versatility contributes to the widespread use of rapid sand filters in most water treatment facilities.