Abstract

The objective of the Selenium Treatment/Removal Alternatives Demonstration was to test and evaluate technologies capable of removing selenium from Garfield Wetlands-Kessler Springs water to below 50 micrograms per liter, the National Primary Drinking Water Regulation Maximum contaminant level established by EPA for selenium.

The three technologies selected for field demonstration during this project were:

• EPA's best demonstrated available technology—ferrihydrite precipitation with concurrent adsorption of selenium onto the ferrihydrate surface (ferrihydrite adsorption) optimized by MSE Technology Applications, Inc. (MSE)
• A catalyzed cementation process developed by Dr. Larry Twidwell of Montana Tech, with assistance from MSE
• A biological selenium reduction process developed by Applied Biosciences Corporation of Salt Lake City, UT

All three of the processes were able to achieve the target level for selenium in effluent samples under optimized conditions.

Contact

Alva Daniels

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