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In Search of the Best Blend: Optimizing Wet Weather Biological Treatment Under the National Blending Policy

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The Mauldin Road Wastewater Treatment Plant is one of twelve wastewater treatment plants (WWTP) owned and operated by Western Carolina Regional Sewer Authority in Greenville, South Carolina. The Mauldin Road WWTP was one of the first WWTPs in the southeast to receive a NPDES permit based on the concepts underlying EPA's National Blending Policy. While the Mauldin Road Plant's previous NPDES permit was based on a rated design capacity of 29 million gallons per day (mgd), the new NPDES Permit provides for wet weather discharges of up to 70 mgd. WCRSA is currently investigating alternatives to provide adequate treatment of wet weather flows under the new NPDES Permit's conditions. Site specific sampling, aeration basin nutrient profiles, and secondary clarifier stress testing has been completed to verify the capacity of the existing facilities and allow calibration of a biological process model. The calibrated model along with the site specific investigations were used to develop and evaluate potential dry and wet weather alternative BNR treatment processes.

Document Type: Research Article


Publication date: 2004-01-01

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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