Overland Flow Treatment of Municipal Sewage at Easley, South Carolina

摘要

Overland flow has been demonstrated to be a feasible method for treatment of either comminuted raw sewage or effluent from a facultative lagoon in piedmont South Carolina where mild winters prevail in a region of high rainfall. An overland flow system was operated for three years at Easley, South Carolina, to treat 284 cubic meters per day (75,000 gpd) of facultative lagoon effluent and 95 cubic meters per day (25,000 gpd) of comminuted raw sewage. Multiple plots were constructed to allow estimation of the effects of various combinations of application rate and frequency according to a second order statistical design. Influent and effluent measurements of classical pollution parameters were made to evaluate the system performance. The system was monitored for bacterial aerosols and the influence of the system on the existing groundwater aquifer.