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Process Modeling and Full Scale Rerate Pilot Testing Results in Innovative BNR Step Feed Process

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The Arlington East Water Reclamation Facility is one of five regional facilities owned and operated by JEA in Jacksonville, FL. In 2003, JEA initiated a detailed process evaluation and study to determine how best to rerate the existing facility from 20 to 25 mgd and to achieve BNR without construction of additional basin volume. Comprehensive wastewater characterization, BioWin modeling, and full-scale pilot testing and stress testing work was conducted to verify that the facility could adequately treat additional flow and to investigate potential biological nitrogen removal processes to meet the total nitrogen goal of 5.8 mg/L required to achieve compliance with the St. John's River nitrogen TMDL. This work resulted in an innovative step feed process with internal mixed liquor recycle, which achieved JEA's goals. Construction of improvements to rerate the facility from 20 to 25 mgd and to achieve an effluent total nitrogen level of 5.8 mg/L has recently been completed.
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Keywords: BNR; Denitrification; pilot test; step feed

Document Type: Research Article

Publication date: 2011-01-01

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