About

We used our treatability laboratory to test several processes to significantly reduce groundwater concentrations of metals for potential treatment either in-situ or ex-situ at the utility client’s ash pond sites. Several processes were evaluated based on the following factors:

• Efficiency/Cost: The treatment train had to be cost effective relative to alternative treatment options like landfilling.
• Kinetics: System processes must have kinetics that are rapid enough to avoid the need for large on-site reaction containers.
• Treatment: CCR commonly have a diverse mix of metals, including boron, arsenic, molybdenum, and barium.  These metals often have to meet stringent groundwater or surface water discharge standards.

Once the bench-scale treatment process evaluation was completed, a 4-month pilot test was successfully completed at the site. A full-scale system has been installed for the site and bench-scale testing for 3 additional ash pond sites is planned for the client.