Aerobic vs. Conventional Septic Systems

Aerobic vs. Conventional Septic Systems

Septic systems come in two main types: conventional and aerobic septic systems. Here's how each of them works.

Septic systems come in two main types: conventional and aerobic septic systems. Here's how each of them works.

According to Circle of Blue, more than one-fifth of American homes are not connected to a public sewer and instead use a septic system to break down and treat wastewater. Septic systems come in two main types: conventional and aerobic septic systems. If your home or business uses a septic system, you may be wondering how it works depending on what type you have. Here’s a basic overview of how conventional septic systems and aerobic septic systems operate.

Conventional Septic Systems

Conventional septic systems are simpler and more common than aerobic septic systems. These systems are anaerobic, which means that little to no oxygen is dissolved in the water. A conventional system operates by taking waste into the septic tank, where heavier solids sink to the bottom and form a sludge, while lighter materials like fats, oils, and greases float to the top and form a layer of scum. The anaerobic bacteria in the tank then break down the waste so it can pass through the pipes to enter the drainfield, where it gets absorbed into the soil.

Aerobic Septic Systems

Aerobic septic systems are more complex. They contain three compartments: a trash tank, a treatment plant, and a pump tank. These compartments can be three separate units or all function as part of the same unit. Like with a conventional septic system, the waste separates into two layers in the trash tank, but instead of moving to a drain field, it goes to a treatment plant. At the treatment plant, an aerator uses oxygen bubbles to break down the waste before sending it to the pump tank to be treated with chlorine. Finally, the wastewater is ready to be absorbed into the soil.

A septic system is a crucial part of a home or business, and whether you have a conventional or aerobic system, it’s important to keep up with maintenance and repairs. Aerobic systems in particular require special attention, as you may need to add chlorine to the pump tank as frequently as once a month. If your septic system is in need of service, contact Red Dirt Septic today. Our team of experts is devoted to providing prompt, professional service and solutions to residential and commercial customers across Central Oklahoma.

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Popular FAQs

Can a flooded septic system be repaired, or does it need replacement?2026-05-14T08:54:18-06:00

It depends on the extent of the damage. Minor issues like clogs or small pipe repairs may be possible. However, if the tank has shifted or the drain field soil has been permanently compromised, a full system replacement may be necessary. A professional assessment is required to determine the best course of action.

What is the average cost of a conventional septic system installation in central Oklahoma?2025-11-23T19:18:33-06:00

A residential conventional system in Edmond typically costs $5,000–$8,000, depending on tank size, soil profile, required lateral footage, and site accessibility.

Red Dirt Septic provides on-site, project-specific quotes and offers financing through trusted local partners with quick approvals and no hidden fees.

What common issues are excluded from aerobic septic warranties?2026-05-12T09:45:16-06:00

Warranties do not cover damage caused by homeowner negligence. Common exclusions include physical damage to sprinkler heads from mowing or digging, and system malfunctions caused by flushing harmful chemicals or non-biodegradable items down the drain.

Can floodwaters cause structural damage to a septic tank?2026-05-14T08:54:53-06:00

Yes. The immense weight and pressure of floodwater and saturated soil can cause physical damage to septic tanks, pipes, and drain fields. This structural damage may not be immediately visible on the surface but can lead to long-term system failure if not inspected by a professional.

Should I test my well water if my septic system was flooded?2026-05-14T08:54:24-06:00

Yes. If floodwaters entered your septic system and you have a nearby water well, there is a high risk of bacterial contamination. It is vital to have your drinking water tested for pathogens and bacteria to ensure it is safe for consumption.

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