The condition of your site and the type of soil present in the area are the two major determining factors of the septic tank system that you choose. Other factors include the groundwater levels and the percolation rate, the speed at which water penetrates the soil.
Since your new septic tank will remain your responsibility, it is important to understand the various types available. This way, you can choose the right one for your condition and know how to take care of it.
Gravity Flow System/Standard Septic System
This is the simplest of all septic tanks systems, comprising of a septic tank and a leach field. With this system, the wastewater is released from a building into the first compartment of the system. Here, the light and greasy materials layer up on the top while the solidified materials sludge at the bottom, allowing the clear in-between zone to flow to the next compartment.
The sieving continues until it reaches the distribution box, which is the beginning of the leach field. The effluent is then discarded via serial distribution in the leach lines.
Low-Pressure Dose System
This system comprises a septic tank, a pump tank and a leach field. Similar to the gravity flow, wastewater leaves a building into the septic tank. The solidified materials settle at the bottom whilst the light and greasy materials layer up on top. The in-between materials flow into the second compartment, and into a pump tank for storage.
From the pump, the effluent is pumped to the leach field where it is evenly distributed via networked small diameter pipes under very low pressure. This system is suitable for areas that have low water permeability due to the poor quality of the soil.
Engineered Supplemental System
Of all septic tanks, this is the most complicated, as it consists of a septic tank, a pump, a pre-treatment media, and a leach field. It works similar to the low-pressure system, but it has a major difference. After leaving the pump, the wastewater is then treated before releasing it to the leach fields. This system is essential for sites that need to control the limitations that come with soils with high or low permeability or in shallow soil depths.
The above description insists on the importance of choosing the right septic tank system for your needs. This will ensure efficiency and proper sanitation. Remember that for a septic system to perform optimally, you must adhere to professional maintenance at least once a year.