INTEGRATION OF COMPUTERIZED O&M MANUALS AND COMPUTERIZED MAINTENANCE MANAGEMENT SYSTEMS TO IMPROVE PERFORMANCE AT SEVEN WASTEWATER TREATMENT PLANTS IN WESTCHESTER COUNTY, NEW YORK

2001 ◽  
Vol 2001 (8) ◽  
pp. 313-330
Author(s):  
Timothy Taber ◽  
Robert Butterworth ◽  
Scott Sellers ◽  
Anthony Landi ◽  
John D'aquino ◽  
...  
Keyword(s):  
New York ◽  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Maintenance Management ◽  
Management Systems ◽  
Improve Performance ◽  
Westchester County

scholarly journals Uncertainty-based flood resiliency evaluation of wastewater treatment plants

2016 ◽  
Vol 18 (6) ◽  
pp. 990-1006 ◽  
Author(s):  
M. Karamouz ◽  
E. Rasoulnia ◽  
Z. Zahmatkesh ◽  
M. A. Olyaei ◽  
A. Baghvand
Keyword(s):  
New York ◽  
New York City ◽  
Wastewater Treatment ◽  
Flood Risk ◽  
Wastewater Treatment Plants ◽  
Urban Systems ◽  
Investment Strategies ◽  
New Perspective ◽  
Unified Index ◽  
Range Of Variation

Wastewater treatment plants (WWTPs) have a significant role in urban systems’ serviceability. These infrastructures, especially in coastal regions, are vulnerable to flooding. To minimize vulnerability, a better understanding of flood risk must be realized. To quantify the extent of efforts for flood risk management, a unified index is needed for evaluating resiliency as a key concept in understanding vulnerability. Here, a framework is developed to evaluate the resiliency of WWTPs in coastal areas of New York City. An analysis of the current understanding of vulnerability is performed and a new perspective utilizing different components including resourcefulness, robustness, rapidity, and redundancy is presented to quantify resiliency using a multi-criteria decision-making (MCDM) technique. To investigate the effect of certain factors of WWTPs on resiliency, uncertainty analysis is also incorporated in developing the framework. As a result, rather than a single value, a range of variation for each WWTP's resiliency is obtained. Finally, improvement of WWTPs’ performance is investigated by allocating financial resources. The results show the significant value of quantifying and improving resiliency that could be used in development of investment strategies. Consideration of uncertainty in the analysis is of great worth to estimate the potential room for improvement of resiliency of individual WWTPs.

scholarly journals Comprehensive Flood Risk Assessment for Wastewater Treatment Plants under Extreme Storm Events: A Case Study for New York City, United States

2021 ◽  
Vol 11 (15) ◽  
pp. 6694
Author(s):  
Qing Sun ◽  
Rouzbeh Nazari ◽  
Maryam Karimi ◽  
MD Golam Rabbani Fahad ◽  
Robert W. Peters
Keyword(s):  
United States ◽  
Risk Assessment ◽  
New York ◽  
Wastewater Treatment ◽  
Sea Level Rise ◽  
Sea Level ◽  
Wastewater Treatment Plants ◽  
Storm Surges ◽  
Economic Damage ◽  
Flood Risk Assessment

Wastewater treatment plants (WWTPs) in the City of New York, United States, are particularly vulnerable to frequent extreme weather events, including storm surges, high-intensity rainfall, and sea level rise, and are also affected by the cascade of these events. The complex structural configuration of WWTPs requires very fine-scale flood risk assessment, which current research has not pursued. We propose a robust technique to quantify the risk of inundations for the fourteen WWPTs through an automated sub-basin creation tool; 889 sub-basins were generated and merged with high-resolution building footprint data to create a comprehensive database for flood inundation analysis. The inundation depths and extents for the WWTPs and flood-prone regions were identified from hydrodynamic modeling of storm surge and sea level rise. The economic damage due to flooding for the WWTPs was also quantified using the HAZUS-MH model. Results indicated that the storm surges from various categories of hurricanes have the dominant impacts on flood depths around WWTPs, followed by high-intensity rainfall. Sea level rise was shown to have a relatively minor impact on flood depths. Results from economic damage analysis showed that the WWTPs are subjected to damage ranging from USD 60,000 to 720,000, depending on the size of the WWTP and the extremity of storm surge. The method of analyzing the inundation status of the research object through the sub-basin enables more accurate data to be obtained when calculating the runoff. It allows for a clearer view of the inundation status of the WWTPs when combined with the actual buildings. Using this database, predicting flood conditions of any extreme event or a cascade of extreme events can be conducted quickly and accurately.

Benchmarking plant operation and instrumentation, control and automation in the wastewater industry

2002 ◽  
Vol 2 (4) ◽  
pp. 163-171
Author(s):  
P. Ingildsen ◽  
P. Lant ◽  
G. Olsson
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Performance Indicators ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Key Performance Indicators ◽  
Dominant Factor ◽  
Improve Performance ◽  
Plant Operation ◽  
Volume Energy

Benchmarking is an effective tool to compare the performance of full-scale wastewater treatment plant operation. In this study, 29 wastewater treatment plants from eight countries were surveyed with the aim of developing some key performance indicators, which may be used for benchmarking purposes. The level of utilisation of instrumentation, control and automation (ICA) has also been measured. The study of ICA utilisation revealed that on average only 23% of all sensors are used for online control. For most parameters, ICA is not the single dominant factor determining performance, although it is the factor that has the highest potential to improve performance. Eighty percent of the participating plants had implemented new control during the last five years leading to improvements in nitrogen and phosphorous removal, energy efficiency and ease of operation. The survey has quantified how “non-standardised” wastewater treatment plant operational practice is. Some simple key performance indicators are derived that relate the level of removal of ammonium, total nitrogen, phosphorous and suspended solids to the resources needed for their removal, i.e. volume, energy, organic matter and precipitation chemicals. Several indicators are suggested for each substance. The indicators show a great difference from the best to the poorest performance indicating that improvement potentials exist at many plants.

Critical modeling parameters identified for 3D CFD modeling of rectangular final settling tanks for New York City wastewater treatment plants

2012 ◽  
Vol 65 (6) ◽  
pp. 1087-1094 ◽  
Author(s):  
K. Ramalingam ◽  
S. Xanthos ◽  
M. Gong ◽  
J. Fillos ◽  
K. Beckmann ◽  
...  
Keyword(s):  
New York ◽  
New York City ◽  
Wastewater Treatment ◽  
York City ◽  
Wastewater Treatment Plants ◽  
Settling Tank ◽  
Cfd Modeling ◽  
Cfd Model ◽  
Conventional Activated Sludge ◽  
City College

New York City Environmental Protection is in the process of incorporating biological nitrogen removal (BNR) in its wastewater treatment plants (WWTPs) which entails operating the aeration tanks with higher levels of mixed liquor suspended solids (MLSS) than a conventional activated sludge process. The objective of this paper is to discuss two of the important parameters introduced in the 3D CFD model that has been developed by the City College of New York (CCNY) group: (a) the development of the ‘discrete particle’ measurement technique to carry out the fractionation of the solids in the final settling tank (FST) which has critical implications in the prediction of the effluent quality; and (b) the modification of the floc aggregation (KA) and floc break-up (KB) coefficients that are found in Parker's flocculation equation (Parker et al. 1970, 1971) used in the CFD model. The dependence of these parameters on the predictions of the CFD model will be illustrated with simulation results on one of the FSTs at the 26th Ward WWTP in Brooklyn, NY.

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