A COST EFFECTIVE MODULAR RECIRCULATING FILTER FOR ONSITE WASTEWATER SYSTEMS

摘要

Because of the proliferation of failed conventional onsite wastewater systems, the author and his associates have developed a modular, multi-layer, pre-engineered, pre-packaged recirculating media filter system (patents pending) to provide pretreatment of septic tank effluent for residential and small commercial users. The system is contained in a single precast concrete tank and includes an integral anoxic recirculation basin, dual attached growth media filters, dosing basin for storage of treated effluent, pumps, valves, piping and digital control system. The unit is designed to reduce biochemical oxygen demand (BOD), total suspended solids (TSS), total nitrogen (TN) and pathogen levels in septic tank effluent for final disposal by conventional absorption systems, subsurface drip irrigation or surface discharge as approved by regulatory agencies.