What treatment occurs in the leaching bed?
Treatment in the leaching bed occurs through a variety of physical, biological and chemical means. Effluent from the second chamber of the septic tank flows to the leaching bed header and is distributed equally to the laterals. Wastewater then moves from the perforated pipe into the gravel in the absorption trench, and eventually into the underlying soil. As this happens, some solids are filtered out (this occurs as the wastewater percolates all the way down the soil column). This is the physical part of the treatment in the leaching bed.
