What process involves reversing flow to clean the filter media?

The process that involves reversing flow to clean the filter media is backwashing. During backwashing, water flows through the filter in the opposite direction to dislodge trapped particles and contaminants from the filter media. This process effectively cleans the filter, allowing it to maintain its efficiency in removing impurities from water.

Backwashing is essential in maintaining the longevity and performance of filtration systems, especially in applications where water quality is critical. The technique is widely used in various types of filtration systems, including sand filters and multimedia filters, in both residential and commercial water treatment settings.

The other processes mentioned, such as washing, flushing, and coagulating, serve different purposes. Washing generally implies cleaning without necessarily reversing flow, while flushing is about clearing out a system, usually without the specific reverse flow component associated with backwashing. Coagulating refers to the process of agglomerating particles in water to improve their removal during filtration but does not involve the cleaning of existing filter media through reversed flow.