Aquatic Technologies LLC

Reduction of TTHM and endocrine disrupting compounds in municipal wastewater

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Courtesy of Aquatic Technologies LLC

The US Geological Service and Environmental Protection Agency have been monitoring the increasing levels of persistent organic pollutants (POPs) in freshwater streams, aquifers, and off-shore coastal waters for the past decade, with the primary identified chemicals being residuals from pharmaceuticals, and petroleum-based fertilizers, herbicides, and pesticides (Pyrines and Pyroids). This monitoring is due to the documented endocrine disrupting nature of the photo (UV) and microbial oxidation resistant intermediary species of these compounds following standard anaerobic and aerobic oxidation treatment regimes employed by municipal wastewater treatment facilities.

Aquatic Technologies performed on-site tests for total TTHM reductions on municipal drinking water (with 0.2mg/l residual chlorine) in Yamhill, Oregon in the summer of 2007. Tests denoted the ability to reduce total TTHM to levels less then 0.006mg/l (analytical lab limit) within 10-minutes of exposure in an open-flow electrode chamber. Further lab testing on TTHM residuals from treatment of high organic storm water run off from a local composting site denoted that even in the presence of high organic loads (TSS >10,000mg/l) TTHM levels did not exceed 0.006mg/l.

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