Tennessee Wastewater Operator Practice Exam

What type of biological treatment works best in shallow ponds with good sunlight exposure?

1. Aerobic treatment

2. Anoxic treatment

3. Facultative treatment

4. Thermophilic treatment

The correct answer is: Aerobic treatment

The most suitable biological treatment for shallow ponds with good sunlight exposure is aerobic treatment. This method relies on the presence of oxygen to support the growth of aerobic microorganisms, which effectively break down organic matter in the wastewater. Shallow ponds that receive ample sunlight facilitate the growth of algae, which in turn produce oxygen through photosynthesis. This natural process enhances the aerobic environment, making it conducive for diverse aerobic bacteria to thrive, thereby improving the overall biological treatment of the wastewater. In such systems, the combination of adequate sunlight and shallow water depth not only boosts oxygen production but also helps maintain the necessary temperature for microbial activity, which is essential for optimal treatment efficiency. The nature of aerobic treatment is particularly advantageous in these conditions, as it leads to better breakdown of pollutants compared to other biological treatment methods that might not harness this sunlight effectively.