Trickling filters can remove 90 to 95 percent of what contaminants found in soil, water, and wastewater?

Trickling filters are designed to treat wastewater by allowing water to flow over a fixed bed of media (such as rock or plastic) that supports the growth of microorganisms. These microorganisms are critical in breaking down organic matter and aiding in the removal of various contaminants.

The correct response indicates that trickling filters can effectively remove a significant percentage of bacteria, viruses, and cholera vibrio. The presence of these microorganisms is common in wastewater and can pose health risks if not adequately treated. The trickling filter system enhances the natural processes of biodegradation and adsorption, leading to the effective removal of these pathogens.

The high efficiency (90 to 95 percent) in removing bacteria and viruses indicates that trickling filters can significantly diminish the load of contaminants that can lead to disease outbreaks. This high reduction rate is essential for ensuring that treated water is safe for discharge or reuse.

In summary, the ability of trickling filters to achieve such high removal rates across a range of biological contaminants highlights their effectiveness in wastewater treatment processes, thereby supporting public health and environmental protection.