Water & Wastewater Articles

  • 4 Steps to Improved Performance Verification

    The performance of any measuring device will change over time and must be regularly verified. A new checklist explains how to set up a performance verification plan for weighing equipment that is GMP-compliant and cost-efficient. Download the ...


    By Mettler - Toledo Int. Inc

  • Analysis of peCOD Technology and Comparison to Dichromate Method

    Bridgnorth Aluminium is a UK-based company that makes high-quality aluminum products for the lithographic industry. Their desire to reduce water consumption and improve process efficiency, led to a 6 figure investment in a new, on-site, effluent treatment plant. Their aim is to reduce water discharge, conform to stringent water authority requirements, increase recycling of water on-site ...


    By MANTECH

  • PeCOD® Case Study #13 Airport De-Icing

    De-icing of aircrafts and airfield pavement is important to ensure the safety of passengers and cargo operators. These operations can have negative environmental impacts, due to the presence of ethylene glycol and propylene glycol, which contribute to high levels of BOD in surface water.  Regulations are in place to ensure that waste from de-icing operations are properly collected and ...


    By MANTECH

  • Return on Investment Using MANTECH Multi-Parameter Analysis Systems - Case Study

    Since 2008 Eurofins has been using MANTECH systems at various facilities around the world. Their first system ran 200,000 samples in five years. The unit analyzed 7 different parameters per sample and operated 24 hours/day, 7 days/week. This generated €5,000,000 in revenue. Their initial investment was €60,000. The system discussed in this case study analyses pH, conductivity, ...


    By MANTECH

  • Combined effects of nutrient enrichment and inorganic sedimentation on benthic biota in an experimental stream system

    Sedimentation and nutrient loading are among the most prevalent threats to fluvial ecosystem integrity. This study employed artificial streams (mesocosms) to simulate individual and combined impacts of nutrient enrichment and deposited fine sediment on benthic biota. Ninety-six circular mesocosms were used in a 21-day crossed experiment that measured the impact of three substrate compositions ...


    By IWA Publishing

  • Made to Bear Extreme Conditions

    Working below sea level, 24 hours a day, 7 days a week, subsea pumps are high-power and high-speed rotating equipment that perform under extreme conditions. Every single part of the pump has to be designed to be extremely reliable and must be tested intensively. The newly developed tilting-pad bearings offer advantages that can be used in other areas of application as well. Certain ...


    By Sulzer Management Ltd

  • Adsorption behavior of phosphate on anion-functionalized nanoporous polymer

    An anion-functionalized nanoporous polymer was successfully prepared by quaternary ammonization and anion-exchange treatment method. The polymer was characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, N2 adsorption/desorption isotherms and thermogravimetric analysis. Batch experiments were conducted to investigate the adsorption behavior of phosphate on the ...


    By IWA Publishing

  • Examining the emerging environmental protection policy convergence in the Ontario municipal drinking water, wastewater and stormwater sectors

    This study examines the governance approaches applying to Ontario's municipal water management activities and observes an environmental policy convergence occurring in two different dimensions: across the drinking water, wastewater, and stormwater aspects of municipal water activities with respect to governance approaches, and federal, provincial, and municipal governments in terms of drawing ...


    By IWA Publishing

  • Rerating Pipeline Pumps

    Pipeline operators transport billions of gallons of oil every year, and they are constantly looking at ways of improving efficiency and reducing costs. Depending on changing network demands, this might require managing an increase or decrease in flow rate in the pipeline, a change in pressure, or a pump upgrade to more efficient technology. Throughout the life of a pipeline, the process ...


    By Sulzer Management Ltd

  • PeCOD® Analyzer 15-minute chemical oxygen demand (C0D) analysis

    The revolutionary PeCOD® Analyzer technology provides Chemical Oxygen Demand results in under 15 minutes in a Simple-Safe-Effective manner. With our mercury and dichromate free chemistry installed in over 20 countries, the PeCOD® Analyzer has delivered successful test monitoring of COD in a variety of environments with our approved and published MOECC method  Through our proprietary ...


    By MANTECH

  • ISO 50001: the route to successful energy and carbon management

    ISO 50001 isn't one of those certificates that you work hard to gain and then quietly forget; it's the backbone of successful day-to-day energy and carbon management. The international energy management standard draws on global best practice from more than 50 countries. Evidence shows that ISO50001 accredited organisations ...


    By Inprova Energy

  • Organic matter capture by a high-rate inoculum-chemostat and MBBR system

    The main objective of this study was to develop an innovative process to maximize the bio-transformation of colloidal and soluble biodegradable matter (CSB) into particulate matter (XB) for energy recovery via methane production. Two configurations were studied: (1) high-rate moving bed bioreactor (HR-MBBR) and (2) inoculum-chemostat (IC) system consisting of a very HR-MBBR inoculating a ...


    By IWA Publishing

  • S.sensing Matrix System, Kurita’s difference in equipment!

    Kurita launched a new modular analyzer system, especially designed for cooling water applications. This integrated system with its range of different controllers and analyzers allows to fit S.sensing MX to practically any application and need. At the same time it is only installed what is really needed at the customer site. The selection of analyzers are based on the real needs: There are ...


    By Kurita

  • 4 Types of Contaminants in Water

    The EPA says that there are 4 type of water contaminants: physical, chemical, radiological, and biological. Its definition includes anything that is not an actual water molecule. That means that naturally occurring things like sediment and water weeds are considered contaminants along with things like oil and uranium. Chances are good that the type of contaminants your company needs to keep out ...

  • Measuring Wastewater Below Ground

    Measuring wastewater is one of the most difficult water management tasks that exists. While some wastewater flows are easy to access, others are very hard to measure because they are in open channel conditions and are below grade. If you need to measure below ground wastewater flow, there are a few factors that you need to consider to help you choose the right tool for the job. With a ...


    By TRACOM Inc.

  • A novel cloud point extraction method for separation and preconcentration of cadmium and copper from natural waters and their determination by flame atomic absorption spectrometry

    A sensitive and simple cloud point extraction method was developed for simultaneous separation and preconcentration of cadmium and copper prior to their determination by flame atomic absorption spectrometry. 4-phenyl-3-thiosemicarbazide was used as complexing agent and the cadmium and copper complexes were extracted from the aqueous phase by Triton X-114 surfactant. The effects of parameters ...


    By IWA Publishing

  • Anaerobic Digest

    Washington, DC: NOSB Considers Digestate Use Petition The National Organic Standards Board (NOSB) of the U.S. Department of Agriculture (USDA) has agreed to consider a petition from Cenergy USA, the makers of Magic Dirt™, to allow use of digestate from anaerobic digestion plants in organic agriculture. Magic Dirt is made from digested dairy manure fibers. The soil amendment products ...


    By BioCycle Magazine

  • Membrane biofouling mitigation through applying electric potential in the CF016 cell

    Membrane filtration is an effective way to remove pollutants and microorganisms from water and wastewater. However, membrane fouling lowers efficiency over time when considering rejection values and water flux.  Fouling is typically biological or particulate; fouling rate is a function of the membrane pore size relative to the size of the foulants and also the interactions between the ...


    By Sterlitech Corporation

  • Central Kitsap (USA) Municipal WWTP - Case Study

    Number of Tanks: 4 Total Volume: 13,080 m³ Water Depth: 4.75 m SOTR Standard Oxygen Transfer Rate: 1,240 kgO2/h Total Airflow: 10,800 Nm3/h Total AEROSTRIP® Diffusers: 1,214 The Central Kitsap facility started operations in 1979 as a conventional activated sludge ...


    By Aquaconsult Anlagenbau GmbH

  • LINZ - ASTEN (Austria) Municipal WWTP - Case Study

    Number of Tanks: 8 Total Volume: 92,000 m³ Water Depth: 7.4 m SOTR Standard Oxygen Transfer Rate: 9,740 kgO2/h Total Airflow: 73,600 Nm3/h No. of AEROSTRIP® Diffusers: 3.328 Linz is the capital of Austrian federal state “Upper Austria” and third-largest ...


    By Aquaconsult Anlagenbau GmbH

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