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water quality assessment Applications

  • Water quality testing for drinking water services in remote areas

    In 1985, the University of Surrey in collaboration with Oxfam developed the Oxfam DelAgua Portable Water Quality Monitoring Test Kit. The Oxfam DelAgua kit enables field workers to test water quality in remote and isolated situations and in circumstances where there is no access to a water testing laboratory. Since its development in 1985, the water test kit has been used by all the major International NGO-s and other aid agencies in over 130 countries around the world.

    In 2006, The University of Surrey and other investors founded DelAgua Water Testing Limited to take over the management of the DelAgua organisation. Since then, various improvements have been made, including:

    • The upgrading of all kits
    • The upgrade of the design, manufacturing and distribution functions
    • R&D to produce a portable microbiological testing kit that provides quantitative results in less than 20 minutes.
    • The upgrade of existing services and the introduction of new services, including:
      • Free access to a water quality risk assessment software program on DWT`s website
      • Free access to a library of reference documents on DWT`s website

    In addition to distributing its own kits and consumables, DWT also offers a distribution service for other manufacturers` products. The most popular products are detailed on this website, but those not detailed can also be supplied - DWT is able to source in excess of 60,000 products from numerous manufacturers.

    DWT is committed to providing services and products to enable the provision of clean drinking water for everyone around the world.

    By DelAgua Group based in Marlborough, UNITED KINGDOM.

  • Continuous Monitoring of Nitrates and Other Water Quality Parameters

    Nitrate is one of the most important parameters in assessing surface and ground water quality. Nitrates are naturally present in surface and ground waters in low concentrations, but are harmful to humans and livestock and cause aquatic ecosystem degradation in high concentrations. Nitrates enter the environment as human-induced pollution from a variety of sources, but the largest source is from agricultural fertilizer runoff . Other sources include wastewater treatment discharge, septic systems, and from pet waste. Nitrate is highly soluble in water and therefore readily leaches into water sources, whereas other human associated pollutants, such as phosphates and ammonia, are not transported as easily. This ability to be quickly transported into ground and natural waters such as drinking water wells, aquifers, reservoirs, lakes, and streams, coupled with its health and environmental implications make nitrate pollution and monitoring of major concern.

    By Hanna Instruments based in Woonsocket, RHODE ISLAND (USA).

  • GIS software for water resource industry

    GIS is a powerful tool for developing solutions for water resources such as assessing water quality and managing water resources on a local or regional scale. Hydrologists use GIS technology to integrate various data and applications into one, manageable system. The suite of tools contained in Arc Hydro facilitate the creation, manipulation, and display of hydro features and objects within the ArcGIS environment.

    By Esri based in Redlands, CALIFORNIA (USA).

  • EPR waste minimisation monitoring for wastewater treatment industry

    The EPR regulations have replaced the IPPC regulations and are effective from May 2009 for qualifying companies within the industrial sector and October 2009 within the water sector. They will progressively require industry to minimise waste, reduce product loss and implement improved process control. The legislation will require the operator to self monitor processes and discharges, to demonstrate effective control with particular emphasis on EPR compliance and prevention. The regulating Agency will operate a point scoring system to assess operators under the OMA-3 program and this will be used to identify how well a company is managing their processes and possibly identify areas for improvement. The Environmental Permitting Regulations require industry to install instrumentation (MCERTS approved where available) to report water quality. EPR compliance monitoring may include automatic water sampling, flow measurement, pH, turbidity and TOC water analysis. Industry will need to identify point of source emissions, take steps to correct inefficient control and alarm unacceptable process deviations. Although the legislation focuses on environmental improvement, good housing keeping also makes a lot of sense. Optimisation of process control minimises waste, reduces treatment costs and ultimately saves money.

    By Pollution & Process Monitoring Ltd based in Sevenoaks, UNITED KINGDOM.

  • APHA Color #3020

    Measurement of APHA color either on-line or in a laboratory setting using a photometer. Background: APHA is sometimes referred to as the Platinum Cobalt (Pt/Co) or Hazen scale. Also referred to as a “yellowness index”, the APHA color scale is a common method of comparison of the intensity of yellow-tinted samples to assess the quality of liquids that are clear to yellowish in color. Originally developed to determine the purity of municipal water supplies, it is now used as a metric for purity in the water, chemical, oil, plastics, and pharmaceutical industries. APHA color quantifies the appearance of trace amounts of yellowness, which is a visual indicator of product degradation due to exposure to light or heat; the presence of impurities and negative effects of processing. As such APHA color is often used as a product release specification. APHA is a single number yellowness index. The units are based on a dilution of a 500ppm solution of PtCo.

    By Guided Wave Inc, based in Rancho Cordova, CALIFORNIA (USA).

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