Hunts Point Wastewater Treatment Plant
The Hunts Point Wastewater Treatment Plant (WWTP) is one of the largest of New York City’s 14 water pollution control plants. The plant treats wastewater from a 16,000-acre area located in the northeast part of the Bronx. The Hunts Point WWTP has been operating since 1952 and has a design dry weather flow capacity of 200 million gallons per day (mgd), and a peak wet weather capacity of 400 mgd.
DEP is currently upgrading the Hunts Point plant to enhance water quality in the East River and comply with Federal and State regulations and judicial Orders of Consent. The proposed improvements to the Hunts Point WWTP are being constructed in phases based on a priority system developed during the facility planning stage of the project.
Phase 1 of the plant upgrade included improvements to meet Consent Order requirements to ensure the plant can treat the 400 mgd peak wet weather flow, including upgrades to gates, screens, the main pump station, and chlorination facilities. Phase 1 also included construction of a Central Residuals Facility (at right) which enclosed major odor sources at the plant, such as the screenings, scum, and grit handling operations, in a new building with odor control. Covers and odor control equipment were also installed at the primary settling tank influent channel. A new Personnel Facility Addition was also constructed adjacent to the existing main building.
Phase 2 is the construction of Biological Nutrient Removal (BNR) facilities to remove nitrogen from the wastewater. Nitrogen is a nutrient which has been linked to algae blooms and low dissolved oxygen levels in the Long Island Sound. Hunts Point will be the first NYCDEP plant to utilize the full Step BNR process. Phase 2 includes construction of upgrades to the existing aeration tanks (right), new process air blowers and diffusers, a new Alkalinity Building, new facilities to control froth, centrate treatment facilities, process instrumentation, and a new main electrical substation. The main electrical substation includes new emergency generators which will provide power to critical equipment at the plant during any power failures.
Phase 3R of the project includes rehabilitation of the existing sludge digesters and storage tanks, installation of new polymer feed facilities which will enhance nitrogen removal, and other miscellaneous improvements to existing facilities.
The project also includes the environmental restoration of the Barretto Point site adjacent to the plant. A portion of the site has been transferred to the Department of Parks and Recreation to create a new City park. Under Contract ER-1, contaminated soil and buried storage tanks were removed from the site, groundwater was pumped and treated, and the site was backfilled with clean fill cover. A temporary structure was erected during construction to enclose the remediation activities and control air emissions.
Construction of Phase 1 started in February 2002 and was substantially complete by April 2010. Construction of Phase 2 started in June 2003. The Phase 2 Step BNR facilities are scheduled to be complete and ready for beneficial use by NYCDEP by July 2010. The environmental remediation of the Barretto Point site started in July 2008, and was substantially complete by September 2009. Construction of Phase 3R, digester renovations, started in January 2010 and is scheduled to be complete by July 2013. Substantial completion of this project is scheduled for 2014.
The project cost is $518 million.
The Hunts Point Monitoring Committee was established to obtain community input on plant construction and operational issues. The Hunts Point Monitoring Committee meets with DEP personnel on a monthly basis at the Bronx Community Board No. 2 office.
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