In late 2011, the United States Army Corps of Engineers approved plans to install a new well and build a new water treatment facility for the City of Roswell, Georgia. Barlovento was selected during a competitive bidding process to provide an iron and manganese removal system for the new water supply. AdEdge Water Technologies was contracted to design, manufacture and commission an iron and manganese treatment plant. The raw water had an iron concentration greater than 0.8 mg/L and a manganese concentration greater than 0.1 mg/L, which exceeded the Environmental Protection Agency’s standards of 0.3 mg/L iron and 0.05 mg/L manganese.

Treatment system
The AdEdge treatment system was designed to treat up to 400 gpm to serve the water supply wells in removing iron and manganese to meet EPA standards. The treatment system was packaged in a compact, skid-mounted unit, AdEdge model APU26-7272CS-2-AVH, using two 72-inch diameter carbon steel vessels in parallel. Each vessel was loaded with AdEdge ADGS+ media and appropriate support media. The ADGS+ media is a proven manganese dioxide coated media used for the removal of arsenic, iron, manganese and hydrogen sulfide.

Features

• Prechlorination using sodium hypochlorite to oxidize iron and manganese for optimal removal.
• Sequestering chemical feed pumps inject ortho-polyphosphates downstream of the APU system to act as a corrosion inhibitor in the distribution piping.
• Post-chlorination for final disinfection in the distribution system.
• System is equipped with inline turbidity, pH and chlorine influent and effluent monitoring equipment.
• Differential pressure monitoring, local pressure gauges, flow sensors and a central hydraulic panel.
• System control provided by PLC and HMI operator interface screen. PLC provides control of well pumps and chemical dosing pumps, as well as remote operator plant control.

Performance
The AdEdge treatment system was commissioned in late 2012. The system is consistently meeting effluent treatment goals of less than 0.3 mg/L for iron and less than 0.05 mg/L for manganese since it began operation.

For more information, call 866/823-3343 or visit www.adedgetech.com.