NYCDEP Newtown Creek Wastewater Treatment Plant Secondary 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 treatment process of high-rate, step-feed activated sludge without primary sedimentation was designed, pilot-tested and installed. The plant’s headworks were upgraded with new coarse and fine screens and grit removal facilities to protect the aeration tanks.
The plant’s extensive upgrade included coarse (1-inch) and fine (3/8-inch) bar screens, optimized operator interfaces for improved system control, expanded electrical power capacity, replaced transformers, new disinfection systems, new digesters and centrifuges, upgraded pumping stations, and new aeration and sedimentation basins and sludge storage tanks, central residuals building, new aeration tanks, and additional odor minimization work.
For more information on this project, or to discuss a similar project in your area, contact Chris Portner at email@example.com