The absorption area for a mound system is referred to as the Basal Area. Heavier soils have lower loading rates and therefore require larger absorption fields. The area of the mound system is determined by the soil loading rate (how many gallons of effluent water per square foot per day the soil can absorb). Contact your local Health Department for details – Here we go!! The best way to learn about a mound system is to review how one is constructed. Learn more about Aerobic Treatment at Meade Septic Spend 5 minutes watching the demonstration video and you will also be convinced. recommends a Sim Tech Filter on all systems that utilizes pressure distribution. The below dosing tank is equipped with a Sim Tech Filter which stops lint, hair and other debris from getting pumped out into the distribution network where it can plug the 1/4″ holes in the pressure distribution laterals. In the event that the pump should fail, the water level in the tank will continue to rise until it trips the high water alarm – letting you know that you have a problem in the dosing tank and that your afternoon is ruined. All pump systems are (or at least should be) set up with a high water alarm. The floats in the dosing tank are set to pump about four times a day (1/4 of the homes wastewater flow). Neglecting to properly design the dosing volume (that includes drainback to the tank) will mean that your distribution network fails to pressurize correctly. The design must figure the size of the dose to be at least 7 times the volume of the laterals. The sprayed effluent is baffled (slowed) by the gravel in the bed and soaks down through the medium textured sand and is incorporated into the native soil below. The carefully designed volume and rate of this dose pressurizes the distribution system so that the effluent is sprayed out of the lateral’s ¼” holes at a design head of three feet. Once on, the pump sends effluent through the force main (also called the delivery line) to the mound’s manifold which distributes the effluent to the small diameter laterals placed inside the gravel bed. Effluent from the septic tank enters the dosing tank and at a specific height and turns on the pump by lifting the pump “on”float switch. The Dosing tank has a pump in it that is used to pump the liquid effluent to the absorption field. A mound system is a type of absorption field, so are trenches, beds, trench chambers, and drip irrigation.ģ. The Absorption field is where the liquid effluent infiltrates the ground. A Baffle on the tank outlet allows only the liquid effluent (partially treated liquid sewage) to exit the septic tank and go to the absorption field, trapping everything else in the septic tank.Ģ. Second – The waste settles into three layers: The sludge, the liquid effluent, and the scum layer (makes you hungry doesn’t it). First – the waste is partially treated and broken down by the anaerobic bacteria in the tank. Two important things happen in the septic tank. The septic tank is where raw wastewater goes initially. Some systems, like mound systems, require a third component called a dosing tank or pump tank.ġ. Septic systems are usually composed of two main components: the septic tank, and the absorption field. 250′ Long Commercial Mound Designed by Meade Septic Design