In this process microorganisms (helps to consume the biodegradable organic constituent from the wastewater) attach them self to media forming a thin layer. This process enhances concentration of microbial population inside the tower and helps in faster waste treatment.
The plastic media has given a new lease of life to trickling filters (also called biotowers) because of its lighter weight, longer life, availability , inertness, compactness, minimum to zero chocking, increase on the performance of the system in smaller footprint area and more importantly simple civil structure.