In early 2008, AdEdge was selected by EcoWater Servisoft in Burton, Ohio, to design, build and start up an integrated treatment system to lower arsenic, iron and manganese levels at the Troyer Water System in Middlefield, Ohio, to below the primary and secondary Maximum Contaminant Levels of 0.010 mg per liter, 0.3 mg per liter and 0.05 mg per liter, respectively. AdEdge first piloted a treatment system in spring 2007 to satisfy Ohio Environmental Protection Agency (EPA) requirements. Showing successful pilot results, AdEdge subsequently designed and implemented a 150-gal-per-minute (gpm) AD26 oxidation and filtration system for arsenic, iron and manganese removal. The site has two existing groundwater supply wells with arsenic levels ranging from 13 to 32 parts per billion and high levels of iron and manganese that serve the manufacturing facility and community. AdEdge worked in conjunction with EcoWater throughout the permitting, installation and startup phases of the project.
The AdEdge treatment system features a skid-mounted AD26 oxidation and filtration package unit sized for a maximum design flow rate of 150 gpm. The model AD26-3660CS-S-3-AVH utilizes AdEdge’s catalytic AD26 MnO2 media in three carbon steel vessels in parallel configuration. The system is equipped with automated control valves and valve harness, a central control panel with programmable logic controller (PLC) and a color touch user interface screen. Other system features include a central hydraulic panel with differential pressure switches, local gauges and flow sensors and totalizers for a complete functioning packaged unit. A hypochlorite feed module also was included and is controlled by the PLC to aid in the oxidation of iron and manganese. Other ancillary equipment that was integrated with the treatment skid and PLC included a finished water backwash supply connection and corresponding valve programming. AdEdge AD26 technology has been deployed successfully by AdEdge on many high arsenic, iron and manganese wells to date, including five full-scale EPA arsenic demonstration projects. It is now one of several of AdEdge AD26 systems permitted by Ohio EPA.
Performance
The system was started up and commissioned in June 2009. It utilizes half of the well pumps’ capacity to meet the facility’s demand. The manufacturing facility uses 99% of the water produced as process water. Approximately 150 gpm consistently is being treated, lowering arsenic, iron and manganese levels to well below the treatment goals.
