NYCDEP Newtown Creek Wastewater Treatment Plant Preliminary Treatment Upgrade
Client: New York City Department of Environmental Protection
Location: New York, NY
The largest of New York City’s wastewater treatment plants, the Newtown Creek Wastewater Treatment Plant underwent a $5 billion upgrade to further improve effluent quality and increasewet weather treatment capacity from 620 million gallons per day (mgd) to 700 mgd. Hazen, as part of a Joint Venture, provided the City with program management, facility planning, design services and operations assistance.
Project Outcomes and Benefits
- Project was completed 2 years ahead of schedule.
- Innovative design approach resulted in over $1 billion dollars in overall savings.
- Upgraded process has consistently exceeded permit requirements for 90% removal of Carbonaceous Biological Oxygen and Suspended Solids.
- Extensive field sampling was performed to characterize influent wastewater characteristics and develop a calibrated BioWinTM model to optimize performance
- Weekly microscopic analysis of Mixed Liquor Suspended Solids samples to identify process issues before they manifest.
- Extensive operational assistance and troubleshooting to assist with issues ranging from controlling sludge bulking and struvite accumulation to optimizing centrifuge and disinfection system performance and maximizing digester gas production and maintaining treatment during construction shutdowns
- Operations costs reduced due to implementation of automation for process control.
In order to maintain plant operation and permit compliance while working on a congested site in the middle of a highly urbanized area, a unique high-rate treatment process without primary sedimentation was designed, pilot-tested and installed. In order to protect downstream processes, the existing Headworks was upgraded. New coarse (1-inch spacing) screens were installed to remove larger debris from the influent flow. Finer (3/8-inch spacing) screens were added after the coarse screens to further protect downstream diffusers, pumps and other equipment from clogging and deposition. The existing grit tanks were upgraded and 8 new grit tanks were constructed, increasing the plant’s capacity to quickly and effectively remove grit at high rates.
The plant’s extensive Preliminary Treatment upgrade included coarse (1-inch) and fine (3/8-inch) bar screens, optimized operator interfaces for improved system control, expanded electrical power capacity, and additional odor minimization work.
For more information on this project, or to discuss a similar project in your area, contact Bryan Atieh at firstname.lastname@example.org