Georgia Septic Installer Practice Test

What is typically the main function of aerobic treatment units (ATUs)?

1. To store liquid waste

2. To enhance the treatment of septic effluent

3. To eliminate solid waste

4. To provide aerobic conditions for bacterial growth

The correct answer is: To enhance the treatment of septic effluent

The main function of aerobic treatment units (ATUs) is to enhance the treatment of septic effluent. These systems utilize aerobic bacteria, which require oxygen to thrive and effectively break down organic matter present in wastewater. By providing an environment rich in oxygen, ATUs promote the growth of these beneficial microorganisms, enabling them to degrade pollutants more efficiently than anaerobic systems typically found in standard septic tanks. In this context, enhancing treatment involves the significant reduction of contaminants, such as nutrients and pathogens, from septic effluent before it is discharged into soil or surface waters. The improvement in treatment effectiveness results in cleaner effluent, which ultimately contributes to better environmental protection and public health. While aerobic conditions are crucial for the function of ATUs, the primary goal remains the enhancement of effluent treatment, setting these units apart from other systems that might focus on storage or solely provide a habitat for bacteria.