Aquatic Technologies LLC

Why septic treatment systems fail to reduce nitrogen in US residential areas

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Courtesy of Aquatic Technologies LLC

The US EPA in cooperation with various state, academic, and NGO agencies has been involved in field tests throughout the eastern United States of conventional and advanced septic systems in order to determine “best” design for the reduction of total nitrogen (as a combination of ammonia-N plus nitrite+nitrate-N), phosphorus, and coliforms for residential (single and multifamily) septic systems due to increasing locations with soils denoted as nitrogen sensitive, and where leaching is compromising both subsurface and surface water sources, or both.

The following is a discussion on why the current systems fail, the lack of design and testing now as regards planned future pollutant reductions by the US EPA, and what changes to septic treatment designs are “common sense” conclusions (for installers, engineers, and equipment manufacturers).

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