online water quality measurement Articles

  • Water quality measurement extreme

    Background The characteristics of the Rio Tinto in the south-west of Spain, near Sevilla, are his ruby colour and the extremely sour pH-value between 0 and 2 pH-units. The river carries a mixture between poisonous heavy metals like copper, nickel, arsenic, iron and cadmium, dissolved in high-percent sulphuric acid. It’s not proved where these unusual conditions come from. As per current ...


    By The OTT Hydromet Group

  • Online flow measurement

    Background The undershoot weir in Hohensaaten was built in 1913. It has three openings and regulates the discharge from the Oderbruch and from the Finow canal into the Hohensaaten-Friedrichsthaler-waterway. Moreover, it protects parts of the Oderbruch against Oder floods. The weir controls the waterlevels in the Havel-Oder-waterway and in the reach of Niederfinow- Hohensaaten. ...


    By The OTT Hydromet Group

  • Colour Measurement as a Tool for Monitoring Oil Quality

    This paper takes a look at the many factors known to have a direct or indirect impact on the quality of oil and the diverse range of different measurement devices have been developed for this purpose, such as relative humidity and absolute water content indicators, particle calculators, dielectric sensors, oxidisation indicators (TAN value), viscosity meters and colour analysers. It explains ...


    By Kytola Instruments Oy

  • Elemental composition of ambient aerosols measured with high temporal resolution using an online XRF spectrometer

    Markus Furger1,*, María Cruz Minguillón2, Varun Yadav3, Jay G. Slowik1, Christoph Hüglin4, Roman Fröhlich1, Krag Petterson3, Urs Baltensperger1, André S. H. Prévôt1 1Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen 5 PSI, Switzerland 2Institute of Environmental Assessment and Water Research (IDAEA), Consejo Superior de ...

  • ppb Dissolved oxygen measurement

    Dissolved oxygen (D.O.) measurement is one indicator of water quality because oxygen is a common element contributing to corrosion reactions. This corrosion reaction provides the need for low level D.O. control since dissolved oxygen is responsible for costly replacement of piping and equipment by corrosive attack on metah. what is Dissolved Oxygen? Dissolved axygan (D.O.f is the ...


    By IC Controls Ltd.

  • ppm Dissolved oxygen measurement

    Dissolved oxygen (D.O.) levels are used as a general indicator of water quality. Oxygen is essential to life and vital for countless aquatic forms. D.O. level control is critical in numerous applications ranging from the monitoring of industrial waste water to environmental surveillance. What is Dissolved Oxygen? Dissolved oxygen (D.O.) is the amount of oxygen gas dissolved in a ...


    By IC Controls Ltd.

  • Case study - Water quality monitoring and weather data at Pampulha Lake-Brasil

    In 2010, OTT Hydromet's partner in Brasil,  Hexis began working with CETEC. This resulted in the installation of a buoy, equipped with an automatic profiling system, in early 2013. The project’s objective is the continuous monitoring of the lake’s water quality, with focus on improving this by the 2014 World Cup Games.  Adcon, Lufft and OTT technologies (Hydrolab DS5X ...


    By The OTT Hydromet Group

  • Analytical Devices for the Measurement of Water Vapor and Hydrocarbon Dew-Point in Natural Gas

    Introduction The determination of water vapor (water dew point) is crucial in the processing, custody transfer and transport of natural gas. High levels of water vapor in a natural gas stream can lead to a number of problems which include the formation of hydrates and the contribution to corrosion of plant and equipment. Furthermore, water vapor present in natural gas streams affects the ...

  • Performance Measurement & Reporting: Measuring what your Company Values

    Measuring environmental performance: Business case for a consumer brand company The main reasons for measuring environmental performance for this company were to pursue opportunities for performance improvement and respond to internal business pressures for reporting performance. The board of directors and senior management team wanted to know how the company was performing globally on ...


    By ERS Global

  • Online Total Bacteria Monitor compared with ATP and flow cytometry - Case Study

    Alkaline Phosphatase Enzyme Activity Measurement as a Robust on-line Monitoring Assay for Water Quality Assessment. Micro organisms maintain their growth by producing enzymes in order to provide low molecular weight inorganic compounds. These compounds could be taken up into the cells from high molecular weight organic compounds which cannot be directly utilized by bacteria. Microbial ...


    By microLAN B.V.

  • Feed-forward coagulant control using online UV/Vis monitoring

    Water quality from the Murray River, Australia, can vary considerably and is expected to become more challenging to treat due to recent drought followed by widespread flooding and future climate change impacts. Better tools are required to help plant operators maintain water quality. Morgan water treatment plant (WTP) operates overnight to take advantage of off-peak electricity, however the ...


    By IWA Publishing

  • What’s the most important measure of success?

    As 2014 comes to a close and we prepare to celebrate Ensia’s second anniversary this coming February, I wanted to take a moment to reflect on the journey we’ve been on over these past couple of years. In my role as Ensia’s director, I often meet with potential partners, supporters, thought leaders and others. More often than not, one of the first questions I’m ...


    By Ensia

  • Performance Measurement & Reporting: Measuring what your Company Values

    Untitled Document This article presents the business case and a simple four-step process to develop performance measures that report meaningful progress against company ...


    By ERS Global

  • Nanofiltration for enhanced removal of disinfection by-product (DBP) precursors in swimming pool water–retention and water quality estimation

    Three nanofiltration (NF) membranes with a chlorine tolerance ≥ 1 mg L-1 were applied to reduce DBPs and their precursors in swimming pool water. A lab scale plant with crossflow modules was installed in by-pass at the sand filter outlet of a swimming pool for a period of several weeks. The chlorine tolerances of the membranes SB90 and NP030 were found to be adequate for filtration under swimming ...


    By IWA Publishing

  • Curren Hits the Bull`s Eye Using Online Process Analyzers

    Howard F. Curren Advanced Wastewater Treatment Plant improved its efficiency by upgrading to online process monitoring and control. The Howard F. Curren Advanced Wastewater Treatment Plant is one of the largest nitrification/denitrification filter plants in the world with a design capacity of 96 million gallons per day average daily flow. It serves about 110,000 accounts in the City of Tampa and ...

  • True technical evolution in Total Organic Carbon (TOC) online monitoring

    TOC Evolution AquaGas introduces the TOC Evolution from SERES Environnement packed with true technical innovation empowering direct TOC online monitoring. TRUE TOC ANALYSIS The TOC Evolution allows accurate and complete measurement of  Total Organic Carbon featuring simultaneous and direct measurement of ...


    By AquaGas Pty Ltd

  • Comparison of two multivariate classification models for contamination event detection in water quality time series

    This paper explores two applied classification models alerting for contamination events in water distribution systems. The models perform multivariate analysis of water quality online measurements for event detection. The developed models comprise an outlier detection algorithm and a following sequence analysis for the classification of events. The first model is an unsupervised minimum volume ...


    By IWA Publishing

  • Tips and resources for measuring sustainable purchasing programs

    How many times have we heard it, "You can't manage what you don't measure"? It's  a management consulting mantra that is repeated so often you could almost tune it out. "Yes, of course" we affirm to our peers and colleagues. But inwardly most of us would agree that developing good key performance indicators (KPIs) and accurate tracking mechanisms are generally underdeveloped across the ...


    By GLOBE Foundation

  • Tools for monitoring distribution system water quality: a study using four parallel pilot systems

    Monitoring and understanding water quality changes within the distribution system is essential to enable effective management to provide good quality water at the customer tap. A recent 2-year study utilised four parallel pilot distribution systems (PDS) and a range of simple tools to assess the impact improving treatment had on the water quality within the distribution system. Particle ...


    By IWA Publishing

  • Implementation of an automatic and miniature on-line multi-parameter water quality monitoring system and experimental determination of chemical oxygen demand and ammonia-nitrogen

    An automatic, miniature and multi-parameter on-line water quality monitoring system based on a micro-spectrometer is designed and implemented. The system is integrated with the flow-batch analysis and spectrophotometric detection method. The effectiveness of the system is tested by measuring chemical oxygen demand (COD) and ammonia-nitrogen in water. The results show that the modified system ...


    By IWA Publishing

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