Issued Patent No. 6,214,607

The contamination of water with perchlorate is potentially a national concern with few known methods of economically treating contaminated water. Currently, there is no proven process available to treat low concentrations of perchlorate in drinking water. Typical water treatment technologies such as ion exchange, air stripping, carbon absorption and advanced oxidation have little effect on perchlorate.

This technology will treat perchlorate-contaminated water using an aerobic biofilm reactor under highly reduced conditions. A packed bed reactor is used to grow perchlorate-respiring bacteria and to reduce perchlorate to the ppb range or lower.