Water Analyses Articles

  • APSI mode simplifies MS spectral analysis

    Analysis of gaseous species by quadrupole mass spectrometry involves ionisation of the molecular species most typically by the electron bombardment technique, the ionisation process creating fragmentation ions additionally to the parent ion. Spectral interpretation can then be compromised by spectral interference in some gaseous mixtures. Hiden Analytical introduce the APSI(Appearance Potential ...


    By Hiden Analytical Ltd.

  • Permeation testing of PET bottles in the production of mineral water - Case Study

    S.Pellegrino mineral water is recognized globally as one of the leading mineral waters on the market. Flowing from a thermal springs in the heart of the Orobic Alps, its properties were known and appreciated since the thirteenth century. In the late nineteenth century it reached peak popularity. In response to the growing demand for entire cases of water from the springs in 1899 the modern ...


    By Systech Instruments Ltd

  • What’s Hiding in the Water?

    As we grow in understanding the significance different organisms have in the ecology of an environment, it helps tremendously if we knowwhich organismsinhabit that environment – whether they’re supposed to be there or not.  One method that is gaining widespread use, and relies on a simple filtration method, is the analysis of environmental DNA (eDNA) from local waterways. ...


    By Sterlitech Corporation

  • Get More Out of Water Resources Engineering Models

    by Venu Kandiah, PhD, P.E. Senior Water Resources Engineer The effort required to develop water resources engineering models can be significant. But once developed, in many instances the models are only evaluated for a limited, or a single set of conditions. The results and predictions obtained from these evaluations are the ones used in design, presented in reports and ...


    By XP Solutions

  • Get more out of Water Resources Engineering Models

    The effort required to develop water resources engineering models can be significant. But once developed, in many instances the models are only evaluated for a limited, or a single set of conditions. The results and predictions obtained from these evaluations are the ones used in design, presented in reports and conveyed to decision makers and the public. This approach might serve ...


    By XP Solutions

  • Quadratic head loss approximations for optimisation problems in water supply networks

    This paper presents a novel analysis of the accuracy of quadratic approximations for the Hazen–Williams (HW) head loss formula, which enables the control of constraint violations in optimisation problems for water supply networks. The two smooth polynomial approximations considered here minimise the absolute and relative errors, respectively, from the original non-smooth HW head loss function ...


    By IWA Publishing

  • Prediction of groundwater levels using evidence of chaos and support vector machine

    Many nonlinear models have been proposed to forecast groundwater level. However, the evidence of chaos in groundwater levels in landslide has not been explored. In addition, linear correlation analyses are used to determine the input and output variables for the nonlinear models. Linear correlation analyses are unable to capture the nonlinear relationships between the input and output ...


    By IWA Publishing

  • Aquavalens: Use of new tools for improved treatment methods for the detection of pathogens in drinking water - Case Study

    Case: use of new tools for improved treatment methods for the detection of pathogens in drinking water The aim of Cluster 3 of the Aquavalens project is to use the newly developed analytical tools, technologies or platforms for the detection of microbial pathogens and indicators in practical settings. Within WP 10, these tests are performed in large drinking water systems located in the ...


    By microLAN B.V.

  • Rethinking micropollutant removal assessment methods for wastewater treatment plants – how to get more robust data?

    This paper covers the pitfalls, recommendations and a new methodology for assessing micropollutant removal efficiencies in wastewater treatment plants. The proposed calculation rules take into account the limit of quantification and the analytical and sampling uncertainty of measured concentrations. We identified six cases for which a removal efficiency value is reliable and four other cases ...


    By IWA Publishing

  • Innovative renewal strategies for optimized pipeline management

    Using risk-based data analysis and innovative renewal strategies, two US water systems show how utilities can avoid full pipeline replacement, reduce service interruptions, and save money. As this informative Opflow article discusses, by more precisely understanding the condition of buried infrastructure, water utilities can more effectively focus resources to prolong safety and increase ...


    By Pure Technologies

  • Water masses surface temperatures assessment and their effect on surrounding environment

    The aim of this study was to evaluate the effect of water masses on the surface temperature with direct impact on the surrounding area. Three systems were used for the study: a fully vegetated system (subsurface flow constructed wetland (CW)), a lake with no vegetation and a lake partially vegetated with Lemna minor. Infrared thermography was applied for the different systems analysis, ...


    By IWA Publishing

  • Ecology of duckweed ponds used for nutrient recovery from wastewater

    The microorganism community that grows under duckweed shelter can play an important role on treatment processes. Therefore, the present study aimed to assess the zooplankton dynamic and microbial community in duckweed ponds (DPs) applied for domestic wastewater treatment under open field conditions. A pilot system comprised of two DPs in series (DP1 and DP2), with 10 m2 each, received domestic ...


    By IWA Publishing

  • Nitrate Analysis of Water Samples Using a Benchtop UV-Vis Spectrophotometer

    Nitrogen is naturally found in groundwater and surface water in the form of nitrate, nitrite, or ammonium. The EPA has established a maximum contaminant level of nitrate-nitrogen in potable water of 10ppm. This application presents results of UV-Vis analysis of nitrate concentrations in drinking water, ground water, and industrial wastewater, showing that the manual colorimetric method is ...

  • A computational fluid dynamics analysis of placing UV reactors in series

    Ultraviolet (UV) light water treatment reactors are commonly used in both wastewater and drinking water disinfection. UV technology can effectively inactivate a large number of pathogens at low UV doses, however adenovirus requires a substantially higher dose than most pathogens of interest. In order to meet adenovirus inactivation requirements, UV reactors are often placed in series and the ...


    By IWA Publishing

  • Decision sciences in the management of water resources: multi-criteria methods and game theory applied to the field of sanitation

    Due to the complexity of some managerial problems, especially those related to sanitation, academic studies have shown the need to use appropriate methods to assist in this type of decision. Within this context, this research aimed to provide a review of the literature from the field of decision sciences to the field of water resource management. It was identified in this study that the use of ...


    By IWA Publishing

  • Multi-objective evolutionary polynomial regression-based prediction of energy consumption probing

    Electrocoagulation (EC) is employed to investigate the energy consumption (EnC) of synthetic wastewater. In order to find the best process conditions, the influence of various parameters including initial pH, initial dye concentration, applied voltage, initial electrolyte concentration, and treatment time are investigated in this study. EnC is considered the main criterion of process ...


    By IWA Publishing

  • Evaluation of chlorine decay models under transient conditions in a water distribution system

    Residual chlorine concentration decreases along distribution networks because of factors such as water quality, physical properties of the pipeline, and hydraulic conditions. Hydraulic conditions are primarily governed by transient events generated by valve modulation or pumping action. We investigate the impact of transient events on the rate of chlorine decay under various flow conditions. ...


    By IWA Publishing

  • Two different purification systems at Istanbul-Tuzla and Adana-Kozan, their characterizations

    In most developed countries, wastewater treatment plants are presently utilizing efficient purification technology meeting the sufficiency requirements of quality and quantity. However, in developing countries, the number of wastewater treatment plants is limited. As a result, the establishment of a connection between the wastewater collection system and wastewater purification plants is ...


    By IWA Publishing

  • Case study - Oil analysis - House Calls - Help reduce offshore equipment failures

    A new approach It is hard to think of another environment where an equipment failure could have a greater negative impact on employee safety and lost production than an offshore oil and gas production platform. Yet offshore platforms are among the world’s most difficult locations to operate and maintain equipment. In most cases, skilled people and supplies can only reach the ...


    By Spectro Scientific

  • IOT TRENDS AND ANALYSIS The Internet of Water Is Saving Lives While Battling Pollution

    he Problem A condition known as Legionnaires' disease has made headlines after it killed a dozen people in Flint, Michigan in 2014 and 2015 and sickened hundreds in  ...


    By Griswold Water Systems

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