Types of Septic Systems

Septic structures are described as centers which can be built to hold liquid wastes from our houses and save you soil and water pollutants. They are typically used for wastewater treatment and for stopping biological and nutrient contaminants. The conventional kind includes gravity and stress distribution structures. Aerobic remedy unit (ATU), mound, and sand filtration centers are categorized below the opportunity kind category.

Conventional Systems


As the name suggests, those employ the pressure of gravity for the drainage cause. Due to gravity, the effluent (water combined with wastewater) flows thru the septic tank into the drainage field. The drainage field includes a sequence of trenches. The area of the drainage need to be such that it lies under the hole level of the tank; the purpose being the operating of the ability the use of gravity. The trenches should have their bottoms mendacity on natural, undisturbed soil. A water desk or tough pan acts as a restrictive layer on this procedure. For this purpose, the bottom of the trenches need to be situated at a location this is 3 – 4 toes above the sort of restrictive layer. The soil that lies among the foot of the trenches and the water desk performs an vital position in this technique. It is utilized within the very last remedy of the effluent or the wastewater. When the effluent makes its way thru the soil, it gets filtered inside the manner. Since the effluent has to reach the ground water, it’s miles cleaned and purified via chemical and organic methods. Dry and permeable soil works great for one of these machine. Sufficient quantity of oxygen inside the soil also provides extra gain to the cleansing manner.

Pressure Distribution

This is common in maximum of the brand new structures due to its ability to make finest use of the drainage subject. It uses a pump for uniform distribution of effluent throughout the drainage discipline, at the equal time. This system presents dosing and resting cycles. This means that the pump tank doses the complete drain with effluent. The pump holds wastewater until it’s miles amassed sufficient, earlier than the next dose to the drainage discipline. Topography of positive regions does no longer allow to set the level of the drainage discipline lower than that of the septic tank outlet. For such areas or websites, the stress distribution facility is maximum suitable.

Alternative Systems
Aerobic Treatment Unit (ATU)

This gadget uses oxygen as its key product for its operation. Here, waste is damaged down with the aid of the usage of oxygen, so that the treated wastewater is cleaner than that of conventional centers. This is an essential element when environmentally sensitive areas or locations are taken into consideration. The working of this gadget can be appeared as a decrease version of the municipal wastewater remedy. The maximum common kind of ATU this is used for household functions uses the suspended increase manner. In this technique, the ability has a water tight tank that consists of an aeration chamber. Inside the chamber, air is pressured and blended with wastewater. This method creates a free-floating situations for bacteria in the liquid. Here, the bacteria develop as they smash down and digest the waste. The wastewater leaving the system is purifier due to the fast decomposition of the natural wastes.


Certain regions can’t provide situations where soil is deep enough for set up of conventional structures. For such places, mound device suits the bill. Here, the drainage machine is raised above the natural soil floor or ground stage. On pinnacle of the herbal soil, unique sand fill fabric is located for the effluent or wastewater remedy. This sand fill includes a gravel mattress, which in flip, includes a network, driven with the aid of pressurized pipes. Septic tank’s effluent reaches the mound thru the pump in a dosing tank. The pump guarantees managed quantity of doses for uniform distribution in the course of the gravel mattress. So, the waste gets filtered when it traverses through the sand fill and into the natural soil.

Sand Filter

It can be installed above and underneath the ground and is based totally upon a principle much like that of a mound machine. The pump tank and the drainage area are separated with the aid of sand. So, the effluent that discharges from the pump tank gets pre-remedy via the intermediate sand, before it enters the drainage area. This facility may be seemed as a organic remedy for natural cleansing of effluent. Places wherein the soil is inadequate for wastewater remedy, it is a superb opportunity for them; this is because the shortage of soil is made up via the sand that is used in the procedure.

From the aforementioned facts, it’s far clean that the installation and the sort of septic system are especially inspired by the bodily characteristics of the place. Many different factors additionally govern its lifespan. The soil sort of the website online, landscape, quantity of applied water, water disposal conduct, and maintenance are essential issues. You can enlarge its life via having it inspected after each interval of 5 years. For proper upkeep, it’s miles beneficial to lease a licensed operator.