water quality control system Articles

  • Recent Federal Developments

    TSCA/FIFRA EPA Extends Comment Period For Draft Guidance For Pesticide Registrants On Notifications, Non-notifications, And Minor Formulation Amendments: On October 5, 2017, the U.S. Environmental Protection Agency (EPA) issued a notice of extension of the comment period for the draft guidance  ...


    By Bergeson & Campbell, P.C.

  • Robust water quality controller for a reverse osmosis desalination system

    This paper presents two-degree-of-freedom (2-DOF) robust loop-shaping control methodology to stabilize a reverse osmosis (RO) desalination system operating under significant uncertainties, external disturbances and measurement noises, and to reduce product water cost. This method has the advantages that no information about the plant uncertainty is required and it can deal with external ...


    By IWA Publishing

  • Quality assurance and Quality control technical note

    Introduction For almost 50 years HYDROLAB products have provided dependable sensor technology in a multiple parameter instrument for montioring essential indicators required for assessing water quality in natural waters. Useable data are the lifeblood of any environmental water quality monitoring program and variation in measurement processes impairs the quality of the data that water ...


    By The OTT Hydromet Group

  • 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. ...

  • Recycled Water Quality

    Matching recycled water quality to beneficial uses requires an understanding of health and environmental requirements. Measures to achieve appropriate recycled water quality are determined firstly by treatment. The degree of treatment depends in part on the source and the hydraulic and biochemical characters of the wastewater. Overall recycled water outcomes may also be controlled ...


    By IWA Publishing

  • A coupled model for water resources allocation regarding water quality control

    In this study, a fuzzy credibility constrained programming (FCCP) model is developed for water quantity and quality management with uncertainties in water quality parameters. The proposed method could reflect not only inexact uncertainties in the objective function, variables and parameters, but also fuzzy uncertainties in the right-hand side. Credibility levels which represent satisfaction ...


    By IWA Publishing

  • Water Quality Models

    ' In order to determine the impacts of a particular discharge on ambient water quality, it is usually necessary to model the diffusion and dispersion of the discharge in the relevant water body. The approach applies both to new discharges and to upgrading of existing sources. This note provides guidance on models that may be applicable in the context of typical Bank projects.' Introduction ...


    By The World Bank

  • Water quality in the Arosa Bay

    Background One of the great impediments to further development of shellfish aquaculture in the north-west region of Spain isa perception that industry expansion and tourism could have negative environmental effects on the coastal waters. Especially the bay around Villagarcia de Arosa is very famous because of its excellent areas for shellfish farming. The government of Spain is ...


    By The OTT Hydromet Group

  • Tools to improve water quality

    This post is part of a series on World Water Week, an annual event designed to draw attention to and discuss global water issues. Read more posts in this series. Agricultural production often comes at the expense of water quality. As my colleague, Mindy Selman, ...

  • Water Quality & Treatment Centers

    A look at the quality of water and the importance of inspecting the integrity of water treatment centers. Water…clear…cold…refreshing. It’s often your “go-to” beverage for quenching thirst after a vigorous activity. We are very fortunate that often within arm’s reach, rests a glass of water. Without hesitation or worry, you can pick it ...


    By Deep Trekker Inc.

  • Real-time control of combined surface water quantity and quality: polder flushing

    In open water systems, keeping both water depths and water quality at specified values is critical for maintaining a ‘healthy’ water system. Many systems still require manual operation, at least for water quality management. When applying real-time control, both quantity and quality standards need to be met. In this paper, an artificial polder flushing case is studied. Model Predictive Control ...


    By IWA Publishing

  • Hydrodynamic Cavitation Pilot Study for Controlling Cooling Water Quality

    A field study was conducted on a cooling-tower system at an automotive manufacturing facility to evaluate the performance of a VRTX hydrodynamic cavitation device for disinfection, scaling, corrosion, and heat-transfer efficiency.Primary findings are:The VRTX unit performed as well as the chemical program that it replaced in terms of bacterial control without adding any chemicals (including ...

  • Control Algae and Improve the Water Quality in Waste Stabilization Ponds

    Due to population growth, accelerated urbanisation and economic development, the quantity of waste water generated is increasing globally. Mainly in low-income areas, a large proportion of the waste water is discharged directly in the environment. When the waste water is treated, the treatment plants may not remove certain pollutants that can have a negative impact on the people and ecosystem. ...


    By LG Sonic

  • Application of water quality indices to define surface water quality in Tehran

    Tehran is one of the capitals of the world that is not situated around a river, therefore surface water discharges into a network of natural streams and even some artificial canals. Owing to the lack of sewerage system, part of the sewage runs to the network of streams without any control. The aim of this work is to identify a baseline for the water quality, which will then help policy-makers and ...


    By Inderscience Publishers

  • Design and management of rainwater harvesting systems to control water quality for potable purposes in Cu Khe, Vietnam

    There are debates about whether rainwater is suitable as drinking water. A serious shortcoming of the debate is that there are differences in the design and management of rainwater harvesting (RWH) systems. This study is based on the performance of two RWH systems that are used for drinking purposes at a kindergarten and a primary school in Cu Khe, Vietnam. Each system comprised a painted ...


    By IWA Publishing

  • Precise Temperature Control assures High Quality Steel

    Process monitoring during continuous casting using special ratio-pyrometers and thermal imagers from LumaSense Today’s increasing quality standards and higher energy costs demand more accurate and consistent temperature control in every step of the steel making process. Steel manufacturing consists of high temperature manufacturing steps that use significant amounts of energy. Processes ...


    By LumaSense Technologies, Inc.

  • Advanced Water Quality Techniques Course

    Abstract:The development of a strategic water quality monitoring program is based on prioritizing risks to public safety and economic reality. The development of global standardized methods and protocols for automated water quality monitoring would facilitate international communication of water quality information and comparison of standardized methods and protocols. The three primary methods ...


  • Establishing Biofilm Control Strategies for Drinking Water Systems

    In last month’s AWWA Opflow magazine, several authors came together to publish an article entitled ‘Biofilm Control – Develop an Effective Strategy to Preserve Quality, Ensure Compliance’.  To access this article, visit AWWA’s website (http://www.awwa.org/publications/opflow.aspx).  The authors summarize ...


    By LuminUltra Technologies Ltd.

  • Biofilm Control for Industrial Waters

    Industrial operations can face a number of serious problems due to bacterial Biofilms growing in process water systems and cooling tower waters. Biofilm-induced corrosion, mechanical blockages and impedance of heat transfer processes result in huge monetary losses each year. In engineered systems, additional risks of biofilm-mediated contamination include negative public health consequences and ...

  • On the usage of artificial neural networks in chlorine control applications for water distribution networks with high quality water

    Artificial neural network (ANN) methodology has found some recent applications as efficient control tools for satisfying free residual chlorine (FRC) levels at critical locations of water distribution systems. This particular research was started to critically investigate the potential and applicability of the ANN approach as a tool for controlling FRC levels for complex water distribution ...


    By IWA Publishing

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