Increased Solids and Phosphorus Removal Following Regulatory Tertiary System Upgrade at the Walton N.Y. Wastewater Treatment Plant

Walton Wastewater Treatment Plant
Walton, New York

The CBUDSF tertiary treatment systems installed throughout the New York City water supply watershed have proven to be robust, reliable and easily maintained. The anticipated lifespan of the CBUDSF systems are 40-50 years with proper maintenance and replacement of supporting equipment (Delaware Engineering, 2008) and are in place at nine WWTP’s in the NYC water supply Catskill and Delaware watershed districts. Over the last 6 years, the CBUDSF system has met its design and operational objectives and continues to perform an integral role in optimizing the Walton WWTP effluent which in turn benefits water quality in the West Branch Delaware River, the Cannonsville Reservoir and the NYC water supply in general. Following installation of the system in January 2003, significant reductions in effluent turbidity (99.99%), total suspended solids (99.95%), phosphorus (99.98%) and fecal Coliform (99.99%) were realized. Plant discharge routinely meets discharge parameter limits for TSS, phosphorus and fecal Coliform. Improvements in water quality below the Walton WWTP as well as other WWTP’s discharging into the West Branch Delaware River have been detected following the regulatory upgrades. NYCDEP stream water quality monitoring operations has measured “drastic” reductions in nutrient loading in the West Branch Delaware River below the Walton WWTP since 2003 when the tertiary system became operational (NYCDEP, 2006). The increased TSS removal facilitated by the tertiary filtration system creates additional TSS loading at the head of the plant since the reject waste stream is directed there. This increase in influent TSS load resulted in a 30% net increase in the weight of residuals generated. Walton WWTP and other watershed WWTP’s operators find that the CBUDSF systems run with relative ease, tolerate variations in input flow composition and are not prone to malfunction (Delaware Operations, 2009). Source: WEFTEC 2009 Proceedings

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Posted: July 6th, 2010 | Filed under: Waste Water Treatment | Tags: Phosphorus Removal, Tertiary Treatment | No Comments »

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