A5040471437- Wastewater Treatment and Nitrogen Removal
- Water Treatment and Disinfection
- Constructed Wetlands for Wastewater Treatment
- Membrane Separation Technologies
- Ammonia Synthesis and Nitrogen Reduction
- Water Quality Monitoring and Analysis
- Microbial Fuel Cells and Bioremediation
- Phosphorus and nutrient management
- Wastewater Treatment and Reuse
- Anaerobic Digestion and Biogas Production
- Water Quality Monitoring Technologies
- Microbial Community Ecology and Physiology
- Advanced oxidation water treatment
- Odor and Emission Control Technologies
- Pharmaceutical and Antibiotic Environmental Impacts
- Catalytic Processes in Materials Science
- Microbial bioremediation and biosurfactants
- Tracheal and airway disorders
- Water-Energy-Food Nexus Studies
- Industrial Gas Emission Control
- Adsorption and biosorption for pollutant removal
- Recycling and Waste Management Techniques
- Carbon Dioxide Capture Technologies
- Reservoir Engineering and Simulation Methods
- Per- and polyfluoroalkyl substances research
Hampton Roads Sanitation District
2016-2025
Virginia Tech
2000-2023
Kansas State University
2023
Université Laval
2022
John Wiley & Sons (United States)
2016-2021
Hudson Institute
2016-2021
Virginia Military Institute
2007-2020
Military Institute
2020
Barber-Nichols (United States)
2020
Commonwealth of Virginia
2020
A three-pronged coordinated research effort was undertaken by cooperating utilities at three different experimental scales investigating bioaugmentation, enrichment and performance of anammox organisms in mainstream treatment. Two major technological components were applied: density-based sludge wasting a selective cyclone to retain granules intermittent aeration repress nitrite oxidizers. This paper evaluates process conditions operation modes direct more nitrogen the resource-saving...
This paper presents an up-to-date meta-analysis assessing per- and polyfluoroalkyl substance (PFAS) concentrations at wastewater treatment plants (WWTPs) as well changes over time. PFAS were compiled for WWTPs in the United States from peer-reviewed studies, technical reports, original data. Perfluorooctanoic acid (PFOA) increased by average of 6.0 ± 1.6 ng/L influents to effluents WWTPs, but perfluorosulfonic (PFOS) did not significantly change, indicating sorption sludge is offset...
Growing interest in the anaerobic treatment of domestic wastewater requires a parallel focus on developing downstream technologies that address nitrogen pollution, especially for systems located eutrophication-impacted watersheds. Anaerobic effluents contain sulfide and hydrogen (a corrosive gas), dissolved methane potent greenhouse ammonium, residual organic carbon predominantly form volatile fatty acids. Conventional approaches to removal are energy- chemical-intensive not appropriate...
ABSTRACT: A cross‐Atlantic R&D‐cooperation involving three large utilities investigated the feasibility of mainstream deammonification—the application partial nitritation/anammox for full‐plant treatment municipal wastewater at ambient temperatures. Two major process components have been implemented, 1) bioaugmentation aerobic‐ and anaerobic ammonia oxidizers (AOB AMX) from DEMON‐sidestream sludge liquor to 2) implementation hydrocyclones select anammox granules retain them in system....
Abstract In this study, concurrent operation of anammox and partial denitrification within a nonacclimated mixed culture system was proposed. The impact carbon sources (acetate, glycerol, methanol, ethanol) COD / NO 3 − ‐N ratio on selection under both short‐ long‐term operations investigated. Results from short‐term testing showed that all supported denitrification. However, acetate glycerol were preferred due to their display efficient selection, which may be related different electron...
ABSTRACT: The nitritation–anammox process is an efficient and cost‐effective approach for biological nitrogen removal, but its application in treating mainstream wastewater remains a great challenge. Mainstream processes could create opportunities achieving energy self‐sufficient, or energy‐generating water resource recovery facilities. Significant advancements have been achieved via pilot‐ full‐scale trials to overcome the major obstacles under conditions, such as repression of...
Cooperation between comammox and anammox bacteria for nitrogen removal has been recently reported in laboratory-scale systems, including synthetic community constructs; however, there are no reports of full-scale municipal wastewater treatment systems with such cooperation. Here, we report intrinsic extant kinetics as well genome-resolved characterization a integrated fixed film activated sludge (IFAS) system where co-occur appear to drive loss. Intrinsic batch kinetic assays indicated that...
Sidestream EBPR (S2EBPR) is an emerging alternative process to address common challenges in related weak wastewater influent and may improve stability. A systematic evaluation comparison of the performance microbial community structure was conducted between conventional S2EBPR facilities North America. The statistical analysis suggested higher stability than EBPR, although possible bias associated with other plant-specific factors might have affected comparison. Variations stoichiometric...
While deammonification of high-strength wastewater in the sludge line sewage treatment plants has become well established, potential cost savings spur development this technology for mainstream applications. This study aimed at identifying effect aeration and organic carbon on process. Two 10 L sequencing bath reactors with different frequencies were operated 25°C. Real effluents from chemically enhanced primary high-rate activated process fed into biodegradable chemical oxygen...
Sequencing batch reactors (SBRs) were operated for 36 days to simulate the potential wastewater treatment impacts as well fate and transport of per- polyfluoroalkyl substances (PFAS) that could be associated with a release alcohol resistant aqueous film forming foam (AR-AFFF) from on-site methanol fire suppression systems. The results this study indicate two exposure AFFF small reductions in mixed liquor solids content nitrification rates. No on denitrification or biological phosphorus...
Despite the increased research efforts, full-scale implementation of shortcut nitrogen removal strategies has been challenged by lack consistent nitrite-oxidizing bacteria out-selection. This paper proposes an alternative path using partial denitrification (PdN) selection coupled with anaerobic ammonium-oxidizing (AnAOB). A nitrate residual concentration (>2 mg N/L) was identified as crucial factor for metabolic PdN acetate a carbon source, unlike COD/N ratio which often suggested....