Physical Water Treatment Articles

  • Climate change vulnerability and resilience of water, sanitation, and hygiene services: a theoretical perspective

    In this paper we outline different theoretical approaches, namely outcome vulnerability, contextual vulnerability, and resilience, for addressing climate change effects in the context of water, sanitation, and hygiene (WASH) services. We analysed how these three approaches were employed in the WASH-climate change nexus literature, and discuss the implications for WASH research, policy, and ...


    By IWA Publishing

  • Psychosocial impacts of the lack of access to water and sanitation in low- and middle-income countries: a scoping review

    The lack of access to safe water and adequate sanitation has implications for the psychosocial well-being of individuals and households. To review the literature on psychosocial impacts, we completed a scoping review of the published literature using Medline, Embase, and Scopus. Fifteen studies met the inclusion criteria and were reviewed in detail. Of the included studies, six were conducted ...


    By IWA Publishing

  • A physical descriptive model for predicting bacteria level variation at a dynamic beach

    A rational-based physical descriptive model (PDM) has been developed to predict the levels of Escherichia coli in water at a beach with dynamic conditions in the Greater Toronto Area (GTA), Ontario, Canada. Bacteria loadings in the water were affected not only by multiple physical factors (precipitation, discharge, wind, etc.), but also by cumulative effects, intensity, duration and timing of ...


    By IWA Publishing

  • Whitepaper: Chemical-physical Water Treatment, Filtration and Flocculation

    Introduction In water treatment plants chemical-physical processes play an essential part in the process chain. They are successfully employed in the pre- and post-treatment of waters of different origins, as well as of other process liquids. In this regard the removal of particles by filtration is a central step. Classical filtration processes are used for particles ranging from ...


    By EnviroChemie GmbH

  • Household water insecurity, depression and quality of life among postnatal women living in urban Nepal

    Objectives: This observational study aimed to assess distress related to the household water supply and to examine the relationship between household water insecurity and psychological health among Nepali postnatal women. Methods: In total, 300 women consented to participate in the study, of which 267 women were able to participate in a follow-up 1 month after discharge. We developed a ...


    By IWA Publishing

  • Effects of physical and morphometric factors on nutrient removal properties in agricultural ponds

    Effects of physical and morphometric factors on nutrient removal properties were studied in small agricultural ponds with different depths, volumes, and residence times in western Japan. Average residence time was estimated to be >15 days, and it tended to decrease from summer to winter because of the increase in water withdrawal for agricultural activity. Water temperature was clearly ...


    By IWA Publishing

  • Effects of thermal hydrolysis temperature on physical characteristics of municipal sludge

    Effects of thermal hydrolysis temperature on the physical properties of municipal sludge was further studied by a series of experiments. There was a decrease in bound water content with an increase in hydrolysis temperature, while there was an increase in pH at temperatures below 120 °C, and a decrease at temperatures exceeding 120 °C. An analysis of settleability, centrifugation and vacuum ...


    By IWA Publishing

  • An enquiry into the place of systems analysis in the politics of water and the environment

    In many jurisdictions, the participation of stakeholders in decisions concerning their environment, and their water environment in particular, is still carried out, if at all, on an ad hoc basis. This paper envisions a legislative structure that allows a natural participation by the people in decision-making. While systems analysis and models may inform opinion in the ideal Legislature, ...


    By IWA Publishing

  • Physical and chemical properties of the Goryczkowe and Bystrej Górne vaucluse springs in the Tatra Mountains

    This paper describes research on two of the largest karst springs in Poland's Tatra Mountains – Goryczkowe and Bystrej Górne – both located in the Tatra National Park. The aim of the study was to determine the potential contributing area for the Bystrej Gorne Spring. Research has shown that seasonal changes in the physical and chemical properties of water in both springs followed a similar ...


    By IWA Publishing

  • Long core physical simulation for CO 2 flooding in low permeability reservoir

    CO 2 flooding is a proven great method to be used for enhancing injection capacity and increasing oil production in low permeability reservoir. In this paper, based on the natural cores and crude oil of Jilin oilfield, three sets of long core tests were conducted to study oil recovery, GOR and pressure variations during water flooding and CO 2 flooding. The performance of advanced CO ...


    By Inderscience Publishers

  • Influence and control of coal facies on physical properties of the coal reservoirs in Western Guizhou and Eastern Yunnan, China

    Western Guizhou and Eastern Yunnan have abundant coal resources, and they are considered as the most prospective areas for coalbed methane (CBM) development in Southern China. To explore the potential of CBM production in these areas, this paper identifies the plane distribution of coal facies, and analyses its control on the physical properties of coal reservoirs. Four types of coal facies ...


    By Inderscience Publishers

  • Looking Beyond Chemical Water Treatment Case Study

    When you think of an environmentally friendly company, a steel processing plant does not typically come to mind. However, Stripco Inc. of Mishawaka, IN, a manufacturer of production-ready, cold-rolled steel coils, is the exception. In August of 1995, Stripco made a wise decision that also proved to be cost-effective and environmentally- friendly when they installed a Superior Environmentalist ...

  • Colloid-A-Tron - case study

    Guinness Knocking scale on the head Scaling caused by hard water , used to cause problems for Guinness in its London Park Royal Brewery, which is world famous for it's quality beer. Guinness fitted their first COLLOID-A-TRON, non chemical scale preventer to a steam injected calorifier which had previously required closing down for a 3 day period ...

  • Physically based closed-form expression for the bimodal unsaturated hydraulic conductivity function

    Simulation of flow and contaminant transport through the vadose zone requires accurate parameterization of the soil hydraulic properties. This requirement is particularly important for soils with a complex structure. In the present study, a physically based closed-form expression for the bimodal unsaturated hydraulic conductivity function is proposed for soils with bimodal pore-size ...


    By IWA Publishing

  • How accurate are physical property estimation programs for organosilicon compounds?

    Organosilicon compounds are important in chemistry and commerce, and nearly 10% of new chemical substances for which Premanufacture Notifications (PMNs) are processed by the US EPA contain Si. Despite this, remarkably few measured values are submitted for key physical properties, and the accuracy of estimation programs like the Estimation Programs Interface (EPI) Suite and SPARC Performs ...


    By John Wiley & Sons, Ltd.

  • Multi–physical field information comprehensive analysis and application of tunnel water–bearing structure

    Water inrush and burst mud cause great hidden danger and economic loss, so it gradually became an important technical problem for tunnel construction. The prediction principle of seismic wave method, electromagnetic wave method, and electrical method were analysed. The merits and demerits of the three methods in the prediction of tunnel water–bearing structure were compared. The superiority of ...


    By Inderscience Publishers

  • Hydrodynamics - Natural Water Bodies

    The knowledge of the characteristics of the fluids and their ability to transport substances and physical properties is relevant for us. However, the quantification of the movements of fluids is a complex task, and when considering natural flows, occurring in large scales (rivers, lakes, oceans), this complexity is evidenced. This book presents conclusions about different aspects of flows in ...


    By IWA Publishing

  • Physical methods in wastewater treatment

    Physical methods of wastewater treatment are useful in water purification and recycling. We have proposed the role of nanoparticle in combination with ultrasound. Ultrasound (US), nanoparticle (NP) or in combination (US + NP) may offer an attractive proposition in the area of water purification. Ultrasound irradiation applications is that acoustic cavitation can affect a number of mechanical, ...


    By Inderscience Publishers

  • The study of adsorption characteristics of electrospun polymer nanofibers for benzenes in water

    The adsorption properties of benzene, p-dichlorobenzene and nitrobenzene on polymer nanofibers were studied. Compared with polyacrylonitrile nanofiber, polystyrene (PS) nanofiber presented better adsorption performance. Langmuir and Freundlich adsorption models were used for the mathematical description of adsorption equilibria, and Freundlich isotherms fitted better. Kinetic studies showed that ...


    By IWA Publishing

  • Control water – control mold

    There is no single universal way to eliminate all mold growth. But the single most effective method of controlling mold is to eliminate their source of moisture. Moisture doesn’t just mean actual water; it can also be high humidity. Few molds grow when the humidity is under 70%. If they do, it is very slowly. It is safe to say that you cannot stop mold growth until you stop the moisture. ...

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