What Is The Difference Between Septic Tank And Sewage Tank

If you're building a new home or upgrading your wastewater system, you might wonder about the difference between septic and sewage tanks. While both types of tanks are used to treat wastewater, they function in different ways and have other purposes. In this blog post, we'll explore the differences between septic and sewage tanks so that you can choose the right system for your needs.

What is a Septic Tank?

A septic tank is a self-contained wastewater treatment system commonly used in rural areas or locations where municipal sewage treatment is unavailable. Septic tanks are typically made of concrete or plastic and are buried underground. Wastewater flows from the home into the septic tank, where it is held for some time while solid waste settles to the bottom and forms sludge. Grease and oils float to the top and form scum.

Once the wastewater has been treated in the septic tank, it flows into a drain field, also known as a leach field, where it is absorbed into the soil. The drain field is designed to filter and treat the wastewater before it enters the groundwater.

Septic tanks require regular maintenance, including pumping, to remove the accumulated sludge and scum. If the tank is not pumped regularly, the solid waste can build up and cause blockages in the system, leading to backups and other issues.

What is a Sewage Tank?

A sewage or holding tank is a large container to hold and stores wastewater until it can be transported to a municipal sewage treatment plant. Unlike a septic tank, a sewage tank does not treat or release the wastewater into a drain field. Instead, the tank is designed to hold the wastewater until it can be pumped out and transported to a treatment plant.

Sewage tanks are typically used in areas where municipal sewage treatment is unavailable or where a property is located too far away from the treatment plant to connect to the municipal sewer system. They can also be used temporarily while a new wastewater system is installed.

Sewage tanks require regular pumping to remove the wastewater and prevent overflow. The pumping frequency will depend on the size of the tank and the volume of sewage produced.

Key Differences between Septic and Sewage Tanks

Now that we've covered the basic definitions of septic tanks and sewage tanks let's take a closer look at the key differences between these two types of wastewater treatment systems.

• Treatment Process

The primary difference between septic tanks and sewage tanks is the treatment process. Septic tanks are designed to treat wastewater on-site, using natural methods to break down the solids and remove contaminants before the wastewater is released into the drain field. Sewage tanks, on the other hand, do not treat the wastewater. Instead, they hold and store the wastewater until it can be transported to a municipal sewage treatment plant.

• Discharge Method

Another key difference between septic and sewage tanks is how the treated wastewater is discharged. In a septic system, the treated wastewater is released into a drain field, which is absorbed into the soil and treated further. In a sewage system, the wastewater is pumped out of the holding tank and transported to a municipal sewage treatment plant for further treatment and processing.

• Maintenance Requirements

Septic and sewage tanks require regular maintenance to ensure proper function and prevent system failures. However, the maintenance requirements for each system are different. Septic tanks need regular pumping to remove the accumulated sludge and scum, while sewage tanks require regular pumping to remove the wastewater and prevent overflow.

• Cost

The cost of a septic tank system versus a sewage tank system can vary widely depending on factors such as the size of the tank, the location, and the local regulations and requirements. Septic tanks are generally less expensive to install and maintain than sewage tanks but may require more frequent pumping and maintenance.

• Environmental Impact

Septic tanks and sewage tanks can have different environmental impacts. Septic tanks treat wastewater on-site, which can reduce the amount of pollutants that enter nearby waterways and groundwater. However, poorly maintained septic tanks can leak and cause environmental damage. On the other hand, sewage tanks do not treat wastewater and may contribute to pollution if not properly managed.

Which is Right for You?

Choosing between a septic tank and a sewage tank will depend on various factors, including your location, property size, and wastewater needs. A septic tank may be the best choice if you are in a rural area with no access to municipal sewage treatment. A sewage tank may be the better option if you are in a room with access to municipal sewage treatment but need a temporary solution.

Working with a qualified wastewater system professional to assess your needs and design a system that meets your requirements is important. A professional can help you understand the local regulations, environmental concerns, and maintenance requirements for each type of system and help you choose the best solution for your situation.

Conclusion

Septic and sewage tanks are used to treat wastewater but have different purposes and functions. Septic tanks treat wastewater on-site and release it into a drain field, while sewage tanks hold and store it until it can be transported to a municipal sewage treatment plant. Choosing between a septic tank and a sewage tank will depend on location, wastewater needs, and environmental concerns. Working with a qualified professional is important to design and install a system that meets your needs and complies with local regulations.