Stromsburg, Nebraska - Arsenic and Manganese Reduction

April 6, 2017
Stromsburg, Nebraska - Arsenic and Manganese Reduction
1.1 MGD

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, NE. Arsenic levels in the water ranged from 0.0178 mg/L to 0.0276 mg/L and manganese levels fluctuated between 0.05 mg/L and 0.12 mg/L, well above the U.S. EPA maximum contaminant levels (MCLs) of 0.010 mg/L and 0.05 mg/L, respectively. 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 ADGS+ treatment system, which consists of two skid-mounted triplexes packaged treatment units with 72-inch diameter vessels. Raw water is oxidized with an iron-rich coagulant 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 wastewater enters a holding tank where the solids settle before the water is recycled back to the head of the treatment system. A small portion of the wastewater is drained to a sanitary sewer to remove accumulated solids.

Installation was completed and the system began operation in July 2013. Since startup, both the arsenic and manganese concentrations have reached non-detectable levels.

Case Study Fast Facts

Client: City of Stromsburg
Engineer: Miller & Associates
Location: Stromsburg, NE
Date: July 2013
Contaminant treated: Arsenic
Flow rate: 1.1 MGD

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