drinking water treatment chemical Articles

  • Application of chemical oxygen demand to drinking water

    “This study investigated the use of a photoelectrochemical chemical oxygen demand (peCOD) analyzer for the detection of model organic compounds and natural organic matter (NOM) from four drinking water treatment plants in Nova Scotia, Canada. Most model organic compounds showed ...


    By Camlab Limited

  • Real Time TOC Analysis in Steam and Condensate

    Executive Summary Steam in petro/chemical plants could be contaminated with hydrocarbons (TOC = Total Organic Carbons) from various sources. In any case this is a sign for defects in the process, whether it they occur in the heat exchanger, the blow down vessel, the condensate recovery or other parts of the system. Conventional solutions to monitor such contaminations use TOC- ...


    By JCT Analysentechnik GmbH

  • Algae control in drinking water treatment - case study

    For the Ministry of Agriculture in Cyprus, LG Sound b.v installed 33 LG Sonic, ultrasonic devices in the Limassol water treatment plant, to prevent bad odour and taste to the water caused by geosmins in the water. The earthy taste problem persisted during summer of 2010 and various physical, chemical and biological tests were done in order to check the process efficiency, which showed problems ...


    By LG Sonic

  • Control-design methodology for drinking-water treatment processes

    The performance of a drinking-water treatment plant is determined by the control of the plant. To design the appropriate control system, a control-design methodology of five design steps is proposed, which takes the treatment process characteristics into account. For each design step, the necessary actions are defined. Using the methodology for the pellet-softening treatment step, a new control ...


    By IWA Publishing

  • Drinking water - India

    EconoPure Water Systems EconoPure Water Systems (formerly DVX Water Technologies, LLC) designs and manufactures highly economical, scalable, low-fouling membrane systems. The Company leverages the unique low-fouling nanofiltration (“LFNano”) system consisting of a unique membrane element that is designed to avoid particulate fouling, biofouling, and scaling. As the name suggests, ...


    By EconoPure Water Systems, LLC

  • Why is Chemical Oxygen Demand (COD) a useful parameter for drinking water analysis?

    Ask the Expert: COD Analysis for Drinking Water Question: Why is Chemical Oxygen Demand (COD) a useful parameter for drinking water analysis? Answer: At very basic level Chemical Oxygen ...


    By Camlab Limited

  • Chemical analysis of drinking water of villages of Sanganer Tehsil, Jaipur District

    Abstract Due to pressure of human activity, urbanization and industrialization, the groundwater sources are degraded gradually; therefore pure, safe, healthy and odorless drinking water is a matter of deep concern. There are many pollutants in groundwater due to seepage viz. organic and inorganic pollutants, heavy metals, pesticides, fluorides etc. In Rajasthan state, all 32 districts are ...

  • Variations of chemical quality for drinking water sources in zarand plain

    The ultimate source of most dissolved ions in water is the mineral assemblage that occurs in rocks near land surfaces. The solids that dissolve into groundwater from this point, form part of the geochemical. Rock composition, purity, crystal size of its minerals, rock texture and porosity, regional structure, degree of fissuring and length of previous exposure time also influence the composition ...


    By University of Tehran

  • 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 ...


    By IWA Publishing

  • 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, ...


    By IWA Publishing

  • Behaviour of brominated and chlorinated flame retardants during drinking water treatment

    Flame retardants are chemicals that are added to plastic materials in order to prevent them from catching fire and to slow down the burning process. Due to the widespread occurrence of flame retardants in the environment, it can be expected that especially the more hydrophilic compounds already contaminate raw water resources of water utilities. In this paper results of laboratory-scale ...


    By IWA Publishing

  • Evaluating a composite cartridge for small system drinking water treatment

    A pilot-scale evaluation was conducted at the U.S Environmental Protection Agency (EPA) Test & Evaluation (T&E) Facility in Cincinnati, Ohio, on a multi-layer, cartridge-based system that combines physical filtration with carbon adsorption and ultraviolet (UV) light disinfection to serve as a home-base water treatment security device against accidental or intentional contaminant events. The ...


    By IWA Publishing

  • Algae and Biofilm control project for a drinking water treatment plant in Cyprus

    For the Ministry of Agriculture in Cyprus, LG Sound b.v installed 33 LG Sonic, ultrasonic devices in the Limassol water treatment plant, to prevent bad odour and taste to the water caused by geosmins in the water. The earthy taste problem persisted during summer of 2010 and various physical, chemical and biological tests were done in order to check the process efficiency, which showed ...


    By LG Sonic

  • Drinking Water Treatment Municipality of Sainte-Geneviève de Batiscan, Quebec

    A number of Quebec municipalities are confronted with feedwater problems of a bacteriological or physicochemical nature hardness, manganese, iron, dissolved solids) in the production of their drinking water. In many cases, these water sources do not meet government quality standards for drinking water. Membrane filtration preceded by the appropriate pretreatments can be a solution. Piloting ...


    By H2O Innovation

  • Crossville, TN, municipal drinking water

    The Situation: The City of Crossville, Tennessee, needed to address increasingly strict regulations on the use of gas chlorine to disinfect their community’s water. The Solution: By switching from gas chlorine to MIOX mixed oxidants, the City has reduced operational costs, improved residual durability, reduced byproduct formation, produced longer filter ...


    By MIOX Corporation

  • Surveillance of the chemical and microbial quality of drinking water for safe water supply in an urban area

    To ascertain the quality of drinking water, surveillance of drinking water quality was conducted in Bhopal. The water supply to water treatment plants (WTPs) is from Kolar dam and Upper Lake. There was no significant change in water quality at the Kolar WTP on a day-to-day basis except in summer, when the manganese content of raw water was 0.3–0.4 mg/L, which was removed during treatment. The ...


    By IWA Publishing

  • A critical evaluation of two point-of-use water treatment technologies: can they provide water that meets WHO drinking water guidelines?

    Point-of-use (POU) technologies have been proposed as solutions for meeting the Millennium Development Goal (MDG) for safe water. They reduce the risk of contamination between the water source and the home, by providing treatment at the household level. This study examined two POU technologies commonly used around the world: BioSand and ceramic filters. While the health benefits in terms of ...


    By IWA Publishing

  • Pilot scale evaluation of biofiltration as an innovative pre-treatment for ultrafiltration membranes for drinking water treatment

    Fouling remains one of the major constraints on the use of low pressure membranes in drinking water treatment. Work over the last few years has shown the importance of biopolymers (carbohydrates and protein-like material) as foulants for ultrafiltration (UF) membranes. The purpose of this study was to investigate at pilot scale the use of rapid biofiltration (without prior coagulation or ozone ...


    By IWA Publishing

  • An approach for determining the most critical among a suite of chemical contaminants at a drinking water intake

    An integrated approach for the identification and assessment of the most critical chemical contaminant(s) at a drinking water intake has been developed. It involves the determination of a threshold or critical raw water concentration (CRWC) for target contaminants using the observed overall removal efficiency of a specific water treatment plant (WTP) and regulated drinking water concentrations ...


    By IWA Publishing

  • 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 ...


    By IWA Publishing

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