You are here:
ENVIRONMENTAL TECHNOLOGY VERIFICATION: JOINT (NSF-EPA) VERIFICATION STATEMENT AND REPORT FOR THE REDUCTION OF NITROGEN IN DOMESTIC WASTEWATER FROM INDIVIDUAL HOMES, BIO-MICROBICS, INC., MODEL RETROFAST ®0.375
Citation:
NSF International, AND Scherger Associates. ENVIRONMENTAL TECHNOLOGY VERIFICATION: JOINT (NSF-EPA) VERIFICATION STATEMENT AND REPORT FOR THE REDUCTION OF NITROGEN IN DOMESTIC WASTEWATER FROM INDIVIDUAL HOMES, BIO-MICROBICS, INC., MODEL RETROFAST ®0.375. U.S. Environmental Protection Agency, Washington, DC, 600/R-03/137, 2004.
Impact/Purpose:
to provide information
Description:
Verification testing of the Bio-Microbics RetroFAST® 0.375 System to determine the reduction of nitrogen in residential wastewater was conducted over a twelve-month period at the Mamquam Wastewater Technology Test Facility, located at the Mamquam Wastewater Treatment Plant. The RetroFAST® System is a submerged and attached growth biological treatment system that is designed to be inserted into a one or two-compartment septic tank. The technology provides an aerobic zone for nitrification and anoxic zone for denitrification. An eight-week start-up period preceded the verification test to provide time for the development of an acclimated biological growth in the RetroFAST®. The verification test included monthly sampling of the influent and effluent wastewater, and five test sequences designed to test the unit response to differing load conditions and power failure. The RetroFAST® proved capable of removing nitrogen from the wastewater. The influent total nitrogen (TN) mean concentration was 39 mg/L, with a median of 36 mg/L. The effluent TN mean concentration was 19 mg/L over the verification period, with a median concentration of 18 mg/L. The mechanical components of the RetroFAST® (blower, airlift, and optional alarm) operated properly throughout the test. Following a blower adjustment, no maintenance or operational changes were required during the final eleven months of the verification test.