Journal of Environmental Engineering: Recent submissions
Now showing items 521-540 of 6477
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Biological Fouling Mitigation in a Forward-Osmosis Membrane Bioreactor
(ASCE, 8/1/2021)Fouling remains a critical barrier for the continued development of forward-osmosis (FO) membrane bioreactor technology (MBR). Thermal osmotic backwashing at 23°C, 60°C, and 80°C, coupled air scouring, and the impact of ... -
Enhanced Degradation of Nitrosamines from Water Using Zero-Valent Iron-Assisted Biological Activated Carbon
(ASCE, 10/1/2021)Nitrosamines have become a focus of considerable research because of their carcinogenicity and environmental universality. In this study, to effectively remove nitrosamines, biological activated carbon (BAC) was acclimatized ... -
Benchmarking Reynolds-Averaged Navier–Stokes Turbulence Models for Water Clarification Systems
(ASCE, 9/1/2021)Turbulence is inherent in clarification basin systems; turbulence is challenging to quantify, yet directly impacting particulate matter (PM) separation. In computational fluid dynamic (CFD), Reynolds-averaged Navier-Stokes ... -
Hydrolysis Combined with Chemically Enhanced Primary Treatment to Remove COD and Retain Nitrogen in Sewage
(ASCE, 9/1/2021)In autotrophic nitrogen removal, heterotrophic denitrifiers compete for nitrite/nitrate with autotrophic denitrifiers in the presence of organic matter, leading to a decline in autotrophic denitrifiers. In this study, a ... -
Removal of Particulate Matter from Meat-Grilling Fumes Using a Mirror-Symmetrical Multicompartment Scrubber
(ASCE, 8/1/2021)In megacities and urban areas, grilling restaurants have been recognized as major sources of particulate matter (PM) with an aerodynamic diameter under 2.5 μm (PM2.5). To reduce PM emissions from grilling fumes, we ... -
Engineered Bioremediation of NAPL Polluted Sites: Experimental and Simulation-Optimization Approach under Heterogeneous Moisture and Temperature Conditions
(ASCE, 8/1/2021)An integrated experimental-numerical approach is used in this study to bioremediate a toluene, a nonaqueous phase liquid (NAPL), contaminated land site, having varying moisture and temperature levels. The rates of ... -
Removal of Carbon Tetrachloride by Enhanced Reduction in a Dual-Chamber Electrochemical Reactor
(ASCE, 8/1/2021)The cathode chamber of a dual-chamber electrochemical reactor separated by DuPont proton exchange membrane, which has a higher reductive capacity than a single-chamber reactor, has a remarkable reduction effect on carbon ... -
Energy Profiles of Nine Water Treatment Plants in the Salt Lake City Area of Utah and Implications for Planning, Design, and Operation
(ASCE, 7/1/2021)This study examined primary data on the energy use (electricity and natural gas) of nine surface water treatment plants in and around Salt Lake City, Utah, and how their energy use relates to their sizes, processes, and ... -
Representation of Near-Wall Particle Fate in a Eulerian–Lagrangian Approach for Clarifier Unit Operations
(ASCE, 7/1/2021)Eulerian–Lagrangian methods are common for computational fluid dynamics (CFD) modeling of particle fate. Near-wall turbulence flow profiles are frequently modeled with wall function (WF) for computational efficiency and ... -
Purifying Heavily Polluted River Water Using Immobilized Native Photosynthetic Bacteria
(ASCE, 8/1/2021)Black putrid river water is often found in densely populated regions with rapid economic development and population growth. This study proposes immobilized native photosynthetic bacteria (PSB), a group of bacteria that can ... -
Effect and Mechanism of the Integrated Ecological Floating Bed on Eutrophic Water Treatment
(ASCE, 8/1/2021)A series of floating beds consisting of biounits were constructed for eutrophic water treatment in the field. Dynamic changes in water quality under each treatment were monitored to investigate treatment performance, and ... -
CFD with Evolutionary Optimization for Stormwater Basin Retrofits
(ASCE, 7/1/2021)Stormwater basins, which are subject to highly unsteady flows and loads, function as clarifiers for particulate matter (PM) and PM-bound constituents. Quasi-steady flow hydrodynamics in water and wastewater treatment plant ... -
Toward PM2.5 Distribution Patterns Inside Symmetric and Asymmetric Street Canyons: Experimental Study
(ASCE, 7/1/2021)Distribution patterns of particulate matter 2.5 (PM2.5) inside urban street canyons varies according to the street canyon enclosure ratio (SCER) and traffic flow states, and therefore they affect people in different positions ... -
Phosphorus Recovery and Reuse Using Calcium-Silicate Hydrate Made from Rice Husk
(ASCE, 6/1/2021)Calcium silicate hydrate was synthesized from rice husk and used to recover phosphorus from model wastewaters. The phosphorus removal capacity of calcium silicate hydrate was substantially lower in a high alkalinity model ... -
Temperature Stratification in an Operational Waste-Stabilization Pond
(ASCE, 6/1/2021)Waste stabilization ponds (WSPs) rely on natural processes to improve water quality. WSPs require less capital or operational resources than traditional treatment and are commonly used in rural communities or for secondary ... -
Transport and Formation of OPAs in Rivers
(ASCE, 5/1/2021)A numerical framework was developed to study oil-particle aggregate (OPA) formation by incorporating NEMO3D code and the A-DROP model into an open-source platform, OpenFOAM. The developed framework was then used to study ... -
Risk-Assessment Method to Forecast Health Hazards Correlated with Distribution of NDM-1 Gene in Waterbodies Surrounding Hyderabad, India
(ASCE, 5/1/2021)The development of pathogenic bacteria encompassing antibiotics-resistant genes (ARGs) is a severe environmental concern related to human health. Among all antibiotics administered to humans, the β-lactam group’s antibiotics ... -
Pilot-Scale Investigation of Floating Treatment Wetlands as Retrofits to Waste-Stabilization Ponds for Efficient Domestic Wastewater Treatment
(ASCE, 6/1/2021)This study investigates the efficacy of floating treatment wetlands (FTWs) for retrofitting waste-stabilization ponds (WSPs) operating in cold continental climates, such that in Alberta, Canada. The objective was to determine ... -
Transport and Fate of Virus-Laden Particles in a Supermarket: Recommendations for Risk Reduction of COVID-19 Spreading
(ASCE, 4/1/2021)The transport of virus-laden particles was investigated numerically in an archetypical supermarket configuration of area 1,200 m2 and ceiling height of 4.5 m. The particles were tracked using a Lagrangian particle tracking ... -
Optimization of Thermal Pretreatment of Food Waste for Maximal Solubilization
(ASCE, 4/1/2021)Food waste has become an increasing concern across the globe. Anaerobic digestion (AD) has been recognized as an effective approach for handling this waste while generating biogas. AD’s performance could be enhanced by ...