What is the main purpose of the fixed nozzles or rotary distributor on a trickling filter?

The main purpose of fixed nozzles or a rotary distributor on a trickling filter is to provide uniform distribution of wastewater over the complete media surface. This uniform distribution is crucial because it ensures that all areas of the media are adequately exposed to the wastewater, promoting optimal biological treatment. When wastewater is evenly spread, it allows for consistent contact with the biofilm that grows on the media, which in turn enhances the efficacy of the treatment process by maximizing the surface area available for microorganisms to break down organic materials.

Having a system that distributes wastewater uniformly helps to prevent localized overloading and ensures that all sections of the media operate effectively. This consistent distribution contributes to greater efficiency in removing pollutants and supports the overall performance of the trickling filter system.