A Study of the Efficiency of Septic Tanks Effluent Treatment in Two Raised Bed Systems

摘要

Two raised bed systems for distribution of septic tank effluent located in Orono, Maine, on soils not suitable for conventional septic tank soil absorption systems were studied to determine treatment performance under given trench and site conditions. The two 'mound' systems were installed at private homes and chemical, physical, and biological parameters were monitored during 1978 and 1979. Results show that groundwater table location in relation to the sand fill is a dominant factor in treatment efficiency. Sand fill treatment efficiency decreased as saturation conditions increased.