Aerobic treatment-drip irrigation systems can significantly reduce and often completely eliminate mounds. In areas where elevated ground water tables are present, mounds are required in order to achieve the appropriate separation between the groundwater and the absorption surface of the drainfield. Mound height can be reduced by as much as 15 inches simply by utilizing an aerobic treatment-drip irrigation system. Reduced mound height results in an overall reduction of the mound footprint. Aerobic treatment-drip irrigation systems can be installed in approximately 50 percent of the space that the conventional mound would otherwise occupy.
Areas that require mounds typically require an expensive excavation of a severely limiting soil condition. It’s expensive because it must be backfilled with good imported material. Excavations can extend 30 to 50 inches or more below the ground surface. Excavations can usually be completely eliminated by installing an aerobic treatment-drip irrigation system.
A combination of reduced footprint and reduced setback requirements enable aerobic treatment-drip irrigation systems to be installed in areas where the conventional septic system just won’t fit. Aerobic treatment-drip irrigation systems almost always cost less than the conventional system in mounded scenarios. These systems also cost less than the conventional system where large homes are proposed. The larger the home, the more cost effective an aerobic treatment-drip irrigation system is.