water treatment modeling Articles
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Optimisation of water treatment works performance using genetic algorithms
Verified static and dynamic models of an operational works were used alongside Monte-Carlo conditions and non-dominated sorting genetic algorithm II (NGSAII) to optimise operational regimes. Static models were found to be more suitable for whole water treatment works optimisation modelling and offered the additional advantage of reduced computational burden. Static models were shown to ...
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An assessment of static and dynamic models to predict water treatment works performance
The relative accuracy of static and dynamic water treatment works (WTWs) models was examined. Case study data from an operational works were used to calibrate and verify these models. It was found that dynamic clarification, filtration and disinfection models were more accurate than static models at predicting the final water quality of an operational site but that the root mean square errors ...
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Region of Queens Municipality Treatment Plant Liverpool, Nova Scotia, Canada – Case Study
Dissolved Air Flotation (DAF) & Filtration (F) Water Treatment Plant. Model DAF-1470-3 & F-1960-4 Water Treatment Plant is designed to treat raw water for the removal of colour, turbidity and other impurities and to provide a high quality effluent for potable and domestic use. The plant combines the time proven principles of mixing, coagulation, flocculation,dissolved air flotation ...
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Study: Involving Public Leads to Better Water Management
Ratepayers’ and water managers’ differing priorities may be bridged with education on issues A new study from Portland State University has identified a specific dissonance between the concerns of the public and of local officials responsible for water management. The study, by Melissa Haeffner, Douglas Jackson-Smith, and Courtney G. Flint, showed that while the public tends to be ...
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Evaluation of control strategies for drinking water treatment plants using a process model
This research adds a method to evaluate control strategies to the design methodology for drinking water treatment plants. A process model dealing with parameters related to the calcium carbon dioxide equilibrium was set up. Using the process model, the existing control strategy was compared with a new control strategy and the effects of two different sets of input data were studied. It was ...
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Comparison of short-term rainfall forecasts for model-based flow prediction in urban drainage systems
Forecast-based flow prediction in drainage systems can be used to implement real-time control of drainage systems. This study compares two different types of rainfall forecast – a radar rainfall extrapolation-based nowcast model and a numerical weather prediction model. The models are applied as input to an urban runoff model predicting the inlet flow to a waste water treatment plant. ...
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Editorial: Status and future of wastewater treatment modelling. Water Science & Technology
Abstract: Modelling of wastewater treatment systems, originally deve- loped by academics primarily motivated by their research interest, has become a standard engineering tool. Initially focussed on the activated sludge process, modelling is now routinely applied for the whole wastewater treatment plant, including sludge and sidestream treatment. The interest in process modelling, as measured by ...
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Fluence Making China Market Inroads with Aspiral™
Hubei Province in China is laced with lakes and rivers, including the mighty Yangtze. Under China’s latest Five-Year Plan, remediation of surface water is being prioritized. Business relationships and local manufacturing pave the way for new $45 million deal At the very center of Central China lies Hubei province, a region defined by its water bodies. The very name Hubei means ...
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Enhancing climate adaptation capacity for drinking water treatment facilities
Conventional water treatment processes (e.g., coagulation, flocculation, sedimentation, and filtration) are widely used for producing drinking water from surface water sources. Transient, gradual, or abrupt changes in source water quality that could compromise treatment effectiveness can be triggered by climate and related meteorological events, accidental or intentional contamination, ...
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Fluorescent microspheres as surrogates to assess oocyst removal efficacy from a modified slow sand biofiltration water treatment system
There has been a resurgence of interest, technological advancement, and implementation of biologically active slow sand filtration technologies for small-scale potable water treatment in North America. Modelling the fate and transport of pathogenic microorganisms is vital to assess technological safety and for licensing, permitting and regulatory validation. The efficacy of a modified slow sand ...
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New framework for standardized notation in wastewater treatment modelling. Water Science & Technology
Abstract: Many unit process models are available in the field of wastewater treatment. All of these models use their own notation, causing problems for documentation, implementation and connection of different models (using different sets of state variables). The main goal of this paper is to propose a new notational framework which allows unique and systematic naming of state variables and ...
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Evaluation of model parameters for simulating TiO2 coated UV reactors
A CFD-based model for simulating TiO2 coated photocatalytic reactors used in drinking water treatment applications was preliminarily evaluated. The model includes aspects of hydrodynamics, mass transfer, UV-radiation field, and surface chemical reactions. Appropriate models for each of the associated physicochemical phenomena were experimentally or analytically examined. Once defined and ...
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Two phase partitioning bioreactor applied to produced water treatment
Produced waters are the largest waste associated with the production of oil and gas; they contain dissolved salts, oil (dissolved and scattered organic compounds), chemicals and additives involved in the oil well operations, suspended particles, sand and other compounds, making their treatment very complex. In this paper, we propose the use of a TPPB (two phase partitioning bioreactor) for ...
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Safety of packaged water distribution limited by household recontamination in rural Cambodia
Packaged water treatment schemes represent a growing model for providing safer water in low-income settings, yet post-distribution recontamination of treated water may limit this approach. This study evaluates drinking water quality and household water handling practices in a floating village in Tonlé Sap Lake, Cambodia, through a pilot cross-sectional study of 108 households, ...
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Modelling nitrite in wastewater treatment systems: A discussion of different modelling concepts
Abstract: Originally presented at the 1st IWA/WEF Wastewater Treatment Modelling Seminar (WWTmod 2008), this contribution has been updated to also include the valuable feedback that was received during the Modelling Seminar. This paper addresses a number of basic issues concerning the modelling of nitrite in key processes involved in biological wastewater water treatment. To this end, we review ...
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Modelling nitrite in wastewater treatment systems: A discussion of different modelling concepts
Abstract: Originally presented at the 1st IWA/WEF Wastewater Treatment Modelling Seminar (WWTmod 2008), this contribution has been updated to also include the valuable feedback that was received during the Modelling Seminar. This paper addresses a number of basic issues concerning the modelling of nitrite in key processes involved in biological wastewater water treatment. To this end, we review ...
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Dynamic soft sensors for detecting factors affecting turbidity in drinking water
Effective monitoring of water quality is critical for water safety. In particular, online monitoring based on modeling is useful in several applications such as process assessment, hazardous event detection or common fault diagnostics in the water processes. Soft sensors have lately established themselves as a good alternative for different tasks of process control such as the acquisition of ...
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Evaluating non‐indigenous species management in a Bayesian networks derived relative risk framework for Padilla Bay, WA
Many coastal regions are encountering issues with the spread of non‐indigenous species (NIS). In this study, we conducted a regional risk assessment using a Bayesian network relative risk model (BN‐RRM) to analyze multiple vectors of NIS introductions to Padilla Bay, Washington, a National Estuarine Research Reserve. We had three objectives in this study. The first objective was to determine ...
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Research on raw water quality assessment oriented to drinking water treatment based on the SVM model
Raw water quality variation has a great effect on drinking water treatment. To improve the adaptivity of drinking water treatment and stabilize the quality of treated water, a raw water quality assessment method, which is based upon the support vector machine (SVM), is developed in this study. Compared to existing raw water quality assessment methods, the assessment method studied herein is ...
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Does water utilities' ownership matter in water pricing policy? An analysis of endogenous and environmental determinants of water tariffs in Italy
Owing to the growing importance of efficient water management, it has become crucial to understand water utilities' characteristics and the environmental factors affecting water pricing, so as to provide guidance to policy-makers. The analysis of factors influencing water tariffs is a challenging task in a context in which companies providing the service are characterized by different ...
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