A5056175738- Wastewater Treatment and Nitrogen Removal
- Water Treatment and Disinfection
- Constructed Wetlands for Wastewater Treatment
- Reservoir Engineering and Simulation Methods
- Ammonia Synthesis and Nitrogen Reduction
- Atmospheric and Environmental Gas Dynamics
- Membrane Separation Technologies
- Phosphorus and nutrient management
- Water-Energy-Food Nexus Studies
- Odor and Emission Control Technologies
- Urban Stormwater Management Solutions
- Advanced Data Storage Technologies
- Catalysts for Methane Reforming
- Aerospace Engineering and Energy Systems
- Water Resources and Management
- Biofuel production and bioconversion
- Groundwater and Isotope Geochemistry
- Geophysical and Geoelectrical Methods
- Water Systems and Optimization
- Water Quality and Resources Studies
- Microbial Fuel Cells and Bioremediation
- Air Quality Monitoring and Forecasting
- Enzyme Catalysis and Immobilization
- Soil and Water Nutrient Dynamics
- Fluoride Effects and Removal
Brown and Caldwell (United States)
2015-2024
Hudson Institute
2020
John Wiley & Sons (United States)
2020
Old Dominion University
2011-2015
Duke University
2015
Densification is a novel intensification strategy with the potential to improve treatment capacity within existing continuous-flow (CF) water resource recovery facilities at low capital and operating costs relatively small particle sizes compared typical aerobic granular sludge (AGS) systems. To achieve densification, biological selection principles derived from selector design AGS concepts have been coupled physical via hydrocyclones full-scale CF promote growth retention of granules. This...
This paper deals with an almost 1-year long pilot study of a nitritation-denitritation process that was followed by anammox polishing. The plant treated real municipal wastewater at ambient temperatures. effluent high-rate activated sludge (hydraulic retention time, HRT=30 min, solids time=0.25 d) fed to the described in this paper, where constant temperature 23 °C maintained. operated promote nitrite oxidizing bacteria out-selection intermittently aerated reactor. intermittent aeration...
The James R. Dolorio Water Reclamation Facility in Pueblo, Colorado, uses AvN aeration controls to lower energy while promoting carbon-efficient nutrient removal and hydrocyclone-based wasting achieve SVI improvements process intensification. results from the full-scale installation showed that helped improve settling characteristics by reducing 200 ± 52 mL/g 83 22 within weeks of operation. PAO nitrifiers were preferentially retained dense flocs granules, lighter heterotrophic filamentous...
Abstract The wastewater industry is currently facing dramatic changes, shifting away from energy-intensive treatment towards low-energy, sustainable technologies capable of achieving energy positive operation and resource recovery. latter will shift the focus to how one could manage extract resources wastewater, as opposed conventional paradigm treatment. Debatable questions arise: can more complex models be calibrated, or additional unknowns introduced? After almost 30 years using...
The main challenge in implementing shortcut nitrogen removal processes for mainstream wastewater treatment is the out-selection of nitrite oxidizing bacteria (NOB) to limit nitrate production. A model-based approach was utilized simulate impact individual features process control strategies achieve NO(-)(2)-N shunt via NOB out-selection. Simulations were conducted using a two-step model from literature. Nitrogen two case studies modeled illustrate contribution mechanisms. paper highlights...
This work describes the development of an intermittently aerated pilot-scale process (V = 0.45 m(3) ) operated for optimized efficient nitrogen removal in terms volume, supplemental carbon and alkalinity requirements. The intermittent aeration pattern was controlled using a strategy based on effluent ammonia concentration set-points. unique feature ammonia-based control that fixed dissolved oxygen (DO) set-point used length aerobic anoxic time (anoxic ≥25% total cycle time) were changed...
ABSTRACT As nitrogen discharge limits are becoming more stringent, short‐cut systems and tertiary polishing steps gaining popularity. For partial nitritation or nitritation–denitritation systems, anaerobic ammonia oxidation (anammox) may be feasible to remove residual nitrite from the effluent. Nitrogen of mainstream system effluent via anammox was studied at 25°C in a fully anoxic moving bed bioreactor (MBBR) ( V = 0.45 m 3 ) over 385 days. Unlike other based processes, very fast startup...
This study presents results from the City of St. Petersburg's (Florida) Southwest Water Reclamation Facility. high-rate BNR plant (SRT ~ 5 days; HRT < 8 hr) achieves combined bioP and shortcut simultaneous nitrification denitrification (SND) via nitrite in a simple configuration-an anaerobic-aerobic (A/O) process without mixed liquor recycle 25% unaerated fraction. N removal to low effluent nitrate ( NO3- + NO2- ) concentrations occurs mainly SND by operating aerated zone at DO, but still...
This work gives an overview of the state-of-the-art in modelling short-cut processes for nitrogen removal mainstream wastewater treatment and presents future perspectives directing research efforts line with needs practice. The status deammonification (i.e., anammox-based) nitrite-shunt is presented its challenges limitations. importance mathematical models considering N2O emissions design operation considered as well. Modelling goals potential benefits are new more advanced approaches...
The magnitude of A-stage effluent particulate COD correlated negatively with B-stage NOB rate during fully intermittent aeration. This was likely due to heterotrophic competition for nitrite
the Intergovernmental Panel on Climate Change (IPCC) has identified that wastewater in closed, underground sewers developed world are not a significant methane (CH4) source (IPCC 2006). Other greenhouse gas (GHG) protocols have followed IPCC's lead and ignored sewer CH4. This simplification been contradicted by research (Guisasola, 2008; Foley, 2009; Guisasola, Gutierrez, van Voorthuizen, 2011; Willis, 2012; Liu, 2014) where CH4 emissions repeatedly detected from both pressure mains gravity...
Source-separating urine for nutrient recovery may provide multiple benefits with regards to wastewater management, water conservation, and an impending phosphorus fertilizer shortage.Municipal systems are designed treat the combination of urine, feces graywater produced in household applications.Urine accounts 1% by volume, but provides 70-90% nitrogen, 35-70% 50% contaminants emerging concern entering municipal treatment (Larsen Gujer 1996).Research has shown managing source-separated is a...
The James R. Dolorio Water Reclamation Facility in Pueblo, Colorado, uses AvN aeration controls to lower energy while promoting carbon-efficient nutrient removal and hydrocyclone-based wasting achieve SVI improvements process intensification. results from the full-scale installation showed that helped improve settling characteristics by reducing 200 ± 52 mL/g 83 22 within weeks of operation. PAO nitrifiers were preferentially retained dense flocs granules, lighter heterotrophic filamentous...