Tennessee Wastewater Operator Practice Exam

When managing a trickling filter's operation, which factor is crucial to ensure optimal treatment?

1. Regular inspection and maintenance

2. Adjusting water temperature

3. Increasing chemical input frequently

4. Shortening the recirculation time

The correct answer is: Regular inspection and maintenance

Regular inspection and maintenance are critical in managing a trickling filter's operation because they ensure the system functions effectively and efficiently. Regular checks allow operators to assess the condition of the filter media, monitor flow rates, and identify any potential blockages or mechanical issues that could impede performance. Proper maintenance helps prevent clogging, ensures the biological film remains healthy, and maintains appropriate hydraulic loading rates. Ensuring that the trickling filter's operational parameters remain within optimal ranges through inspection can greatly enhance the overall treatment process. For example, observing the growth of biofilm on the filter media can indicate whether the system is working as intended. Routine maintenance tasks such as cleaning the nozzles, lubricating equipment, and removing excess biomass can prevent malfunctions and maximize aeration, both of which are crucial for ammonia and biochemical oxygen demand (BOD) removal. While factors like water temperature, chemical input, and recirculation time may play a role under certain circumstances, they do not outweigh the fundamental importance of a systematic approach to regular inspections and preventive maintenance in ensuring the continued effectiveness of trickling filter operations.