Are Aerobic Systems More Expensive To Operate Than Conventional?

High Energy Requirements

Aerobic systems, which use oxygen to break down organic matter, require a significant amount of energy to maintain aeration. This can lead to increased operating costs, especially if the system relies on a mechanical aerator or blower. In contrast, conventional systems often use anaerobic treatment, which relies on natural processes and does not require additional energy input. For example, a mechanical aerator for an aerobic system can consume up to 1-2 horsepower (0.75-1.5 kilowatts) per day, resulting in increased electricity costs.

Design and Installation Considerations

The design and installation of aerobic systems also contribute to their higher upfront costs. Aerobic systems often require a larger footprint, as well as additional components such as pumps, controls, and aeration devices. According to the Environmental Protection Agency (EPA), the average cost of an aerobic system can range from $10,000 to $50,000 or more, depending on the size and complexity of the system. In contrast, conventional systems are often less expensive to install, with costs ranging from $5,000 to $20,000.

Treatment Efficiency and Maintenance

While aerobic systems can be more expensive to operate, they often produce higher-quality effluent and require less maintenance than conventional systems. Aerobic systems can achieve treatment efficiencies of 95% or higher, compared to 80-90% for conventional systems. Additionally, aerobic systems often have fewer moving parts and require less frequent maintenance, reducing labor and repair costs in the long run. However, regular maintenance is still necessary to ensure optimal performance and extend the lifespan of the system.