Tennessee Wastewater Operator Practice Exam

Which type of pond treatment system is most appropriate for handling high strength industrial waste?

1. Aerobic

2. Facultative

3. Conventional

4. Anaerobic

The correct answer is: Anaerobic

The choice of anaerobic pond treatment systems for handling high strength industrial waste is appropriate due to several key characteristics of anaerobic systems. Anaerobic treatment relies on microorganisms that thrive in environments without oxygen. These microorganisms are particularly effective at breaking down complex organic materials and high-strength waste, which are often found in industrial discharges. In anaerobic conditions, the breakdown of organic matter produces biogas, primarily methane, which can be captured and used as a renewable energy source. This not only helps reduce the volume of waste but also allows for energy recovery, making anaerobic systems both efficient and sustainable for high-strength waste treatment. Additionally, anaerobic treatment typically involves lower operational costs compared to aerobic systems, as they do not require aeration and have lower energy costs. This is particularly beneficial in industrial settings, where minimizing operational expenses is crucial. While aerobic and facultative systems can certainly be used for wastewater treatment, they generally require lower concentrations of organic matter. Anaerobic systems are more suited for high-strength wastes due to their ability to handle and stabilize such materials effectively, making them the preferred choice in this context.