Tennessee Wastewater Operator Practice Exam

What type of systems mostly utilize trickling filters?

1. Aerobic treatment systems

2. Anaerobic treatment systems

3. Hybrid treatment systems

4. Chemical treatment systems

The correct answer is: Aerobic treatment systems

Trickling filters are primarily associated with aerobic treatment systems because they utilize a biological process that relies on the presence of oxygen. In these systems, wastewater flows over a bed of media (such as stones or plastic) that provides surface area for microorganisms, primarily bacteria, to grow. These microorganisms decompose organic matter in the wastewater as it trickles over the media, allowing oxygen from the air to facilitate the aerobic digestion process. This method is particularly effective for treating wastewater because it promotes the growth of aerobic bacteria, which are more efficient at breaking down organic compounds compared to anaerobic bacteria. Consequently, trickling filters are designed to maximize oxygen transfer, enabling the treatment of high volumes of wastewater efficiently. Aerobic treatment systems are essential in many municipal wastewater treatment facilities, and trickling filters are a cost-effective and robust option within this category, making them a popular choice for effective wastewater management.