A Septic tank is one of three common waste management systems which collect water waste from a property rather than being connected to a mains drainage system.

All these waste management systems have small differences in their process of collecting and treating wastewater.

Other waste management systems are a Cesspit or Sewage treatment plant.

Not dissimilar to the cesspit, the septic tank also collects wastewater, but it holds a more complex service.

The system usually comprises of two chambers. The first chamber holds all incoming wastewater and all solids are ‘encouraged’ to settle at the bottom of the tank where they will be decomposed by the septic bacteria through anaerobic digestion.

Meanwhile, the liquors (liquid) will drain into the second chamber where any suspended particles are again encouraged to settle at the bottom while the remaining liquors are exited into the soakaway system and into the surrounding environment. All other impurities are trapped and eliminated in the soil.

It is important to understand that there are many regulations which need to be followed which are issued by the Environment Agency if your household has, or is potentially going to have, a septic tank installed.

One regulation which is important to this article is the ‘Consent to Discharge’.

Septic Tanks don’t necessarily require for a full empty, however, they do need to be de-sludged on a regular basis. This process removes the solids (the sludge) from the system while making sure there still remains an effective amount of bacteria-laden water for the system to continue to run at an optimal level. 

A septic tank is commonly known as the most cost-efficient waste management system as you only need to de-sludge the system 1-2 times a year.

The size of your tank will potentially affect how much it costs to empty your septic tank.

See the most common sizes below:

 1000 Gallons / 4500 Litres           

2000 Gallons / 9000 Litres          

3000 Gallons / 13500 Litres        

4000 Gallons / 18000 Litres       

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