In May 2011, AdEdge Water Technologies was selected among other vendors by Miller & Associates to supply a turnkey arsenic and manganese treatment system for the Village of Stromsburg, Nebraska. Arsenic levels in the water ranged from 0.0178 mg/L to 0.0276 mg/L and the manganese levels fluctuated between 0.05 mg/L and 0.12 mg/L, well above the EPA maximum contaminant levels of 0.010 mg/L arsenic and 0.05 mg/L manganese. Several treatment options for the removal of these contaminants were considered; however, a GS+ approach was chosen for simultaneous co-contaminant removal and a smaller footprint than other processes. Project work was closely coordinated with Miller & Associates. AdEdge designed, manufactured, and installed the treatment system.
The AdEdge ADGS+ system consists of two skid-mounted triplex packaged treatment units with 72-inch diameter vessels. Raw water is oxidized with an iron rich coagulant is added to the water prior to treatment to promote maximum removal of the arsenic and manganese. A polymer dosing pump is also included in the treatment system for effective process operation. The flocculated material after the polymer addition is captured in the ADGS+ media. The filters are backwashed and waste water enters a holding tank where the solids settle before being the water is recycled back to the head of the treatment system. A small portion of the waste water is drained to a sanitary sewer to remove accumulated solids.
Installation was completed and the system began operation in July 2013. Since start up, both the arsenic and manganese concentrations have reached non-detectable levels.