water treatment modeling Articles
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Decision support system for risk management of produced water in offshore oil and gas industries
A decision support system for produced water management (DISSPROWM) in offshore operations is presented. The system determines the risk and hazards to human and marine species from non-carcinogenic and carcinogenic pollutants present in produced water including radionuclides. The DISSPROWM also evaluates best available treatment technology for treating the produced water whose properties are in ...
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Modelling the catchment-scale environmental impacts of wastewater treatment in an urban sewage system for CO2 emission assessment
Water shortages and water pollution are a global problem. Increases in population can have further acute effects on water cycles and on the availability of water resources. Thus, wastewater management plays an important role in mitigating negative impacts on natural ecosystems and human environments and is an important area of research. In this study, we modelled catchment-scale hydrology, ...
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Quantitative analysis of microbial contamination in private drinking water supply systems
Over one million households rely on private water supplies (e.g. well, spring, cistern) in the Commonwealth of Virginia, USA. The present study tested 538 private wells and springs in 20 Virginia counties for total coliforms (TCs) and Escherichia coli along with a suite of chemical contaminants. A logistic regression analysis was used to investigate potential correlations between TC ...
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Two-phase simulations of an off-nominally operating dissolved-air flotation tank
The flow patterns of the contaminated water and the air bubbles inside a large-scale Dissolved Air Flotation (DAF) tank were examined using CFD modelling. The DAF tank was operating off-nominally in the sense that it was supplied with bubbles larger than originally designed for. Attention was drawn to the location for air injection and the effect of having more than one-size bubbles in the tank, ...
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Organophosphate Pesticide Degradation Under Drinking Water Treatment Conditions
Chlorpyrifos (CP) was used as a model compound to develop experimental methods and prototype modeling tools to forecast the fate of organophosphate (OP) pesticides under drinking water treatment conditions. CP was found to rapidly oxidize to chlorpyrifos oxon (CPO) in the presence of free chlorine. The primary oxidant is hypochlorous acid (HOCl); thus, oxidation is more rapid at lower pH (i.e., ...
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Calibrating an optimal condition model for solar water disinfection in peri-urban household water treatment in Kampala, Uganda
In low income settlements where the quality of drinking water is highly contaminated due to poor hygienic practices at community and household levels, there is need for appropriate, simple, affordable and environmentally sustainable household water treatment technology. Solar water disinfection (SODIS) that utilizes both the thermal and ultra-violet effect of solar radiation to disinfect water ...
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Meet Some of the Southeast Innovators Taking On The Global Water Crisis
Home Feature Meet Some of the Southeast Innovators Taking On The Global Water Crisis FeatureStartup News Meet Some of the Southeast Innovators Taking On The Global Water Crisis by Maija Ehlinger December 22, 2021 It’s a paradox for anyone working on the global water crisis: Water is infinitely recyclable, and yet we are running out of it. Estimates ...
By 4Earth
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Removing VOCs from Municipal Water Supply - Case Study
QED E-Z Tray® Air Strippers Removing Volatile Compounds in Cheyenne’s Drinking Water The U.S. Army Corps of Engineers (USACE) – Omaha District has funded the design and construction of a new groundwater treatment plant in Cheyenne, Wyoming to treat groundwater from the city’s Borie well field. This important groundwater supply was apparently contaminated with ...
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