In 2007 AdEdge Water Technologies was selected by the U.S. EPA and the host site in Round 2a of the Arsenic Demonstration Program to implement a turnkey arsenic treatment system for the Geneseo Hills Community in Geneseo, IL. The contract was to provide and manage all permitting with IEPA (Illinois Environmental Protection Agency), design, fabrication, installation and startup activities. This was AdEdge's 11th full-scale EPA demonstration project.
The Geneseo Hills water system is served by one well with a design flow of 200 gallons per minute (gpm) and one backup well. The well provides potable water for a community with 190 connections and a population of approximately 480 residents. The treatment system receives water on the demand side of the storage tanks with an arsenic level of 25 parts per billion (ppb), which is above the U.S. EPA maximum contaminant level (MCL) of 10 ppb. From the combined 21,000 gallon twin pressurized storage tanks, water is treated by the AdEdge system configured in parallel.
AdEdge proposed and installed a treatment system designed to reduce arsenic concentrations to below the arsenic treatment standard of 10 ppb. The model, APU-5460CS-S-2-AVH, utilizes adsorption technology deploying AdEdge’s Bayoxide E33 granular ferric oxide (GFO) media. The design also includes a 100% backwash recycle system capable of filtering particulates and reclaiming all of the periodic backwash water for treatment and use.
The packaged system features twin 54-inch diameter carbon steel adsorption vessels mounted on a painted epoxy coated carbon steel skid, pre-piped and integrated. The system is placed after a pre-chlorination module for oxidation of arsenic (III) to arsenic (V), and is equipped with automated control valves and harness, central control panel with programmable logic controller (PLC) and a color user interface screen. The system also features a hydraulic panel with local gauges and sample ports for a complete functioning packaged unit.
Since full-time operation began April 2008, the system has effectively reduced arsenic levels consistently to below 2 ppb, which is well below the MCL. Approximately 30,000 gallons per day (gpd) are processed through the system on average. The site’s operator performs the routine sample collection and reporting associated with the U.S. EPA’s Demonstration Program requirements with quarterly reporting of the data by U.S. EPA’s contractor Battelle. A six-month EPA summary report will be produced and available in the near future.
Case Study Fast Facts
Client: Geneseo Hills Community
Location: Geneseo, IL
Contaminant treated: Arsenic
Flow rate: 200 gpm