What is a consequence of excessive slime growths in a trickling filter?

Excessive slime growths in a trickling filter can lead to ponding due to the plugged media. When there is an overabundance of biological slime, it can accumulate and obstruct the openings of the filter media. This blockage prevents proper flow of wastewater through the system, causing water to pool or pond on the surface rather than being distributed evenly. This situation can hinder the treatment process as the wastewater does not receive the necessary contact time with the microbial film needed for effective treatment.

The filtration quality is not improved with excessive slime; in fact, it usually diminishes. Additionally, while gas exchange is critical for biological processes, excessive slime can interfere with oxygen exchange as well. Nutrient removal is also compromised because the treatment efficiency decreases as the media becomes clogged and less functional. Thus, the buildup of slime is detrimental to the overall performance of the trickling filter system.