Trickling filter

A trickling filter is a biological wastewater treatment system that uses a bed of media (like rocks or plastic) to support beneficial bacteria. Wastewater is distributed evenly over this bed, where the bacteria naturally break down organic pollutants. As the water trickles through the media, the bacteria digest the contaminants, reducing pollution before the water is released or further treated. This process is efficient, relies on natural biological activity, and is commonly used in sewage treatment plants to clean water sustainably.