water laboratory Articles
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Testing the waters with Tecta - Sydney Water Laboratory Services
Speeding up the return of microbiological data to improve our response to environmental incidents Why do we test for E. coli? Escherichia coli (E. coli) is one of many kinds of bacteria that live in the gut of humans and animals. They’re easy to find because faeces contains large numbers of E. coli. So to detect faecal pollution, we look for E. coli to warn us that other nasties may be ...
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Analysis of Geosmin and 2-Methylisoborneol Utilizing the Stratum PTC and Aquatek 70
Abstract Geosmin and 2-Methylisoborneol are organic compounds that have a distinct scent. These compounds also have an extremely low odor detection threshold and because of this, many drinking water laboratories require detection levels of below 10ppt. This application note investigates the detection of Geosmin and 2-Methylisoborneol at a one part per trillion (ppt) level utilizing Purge and Trap ...
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Comparison of Mold Odor Analysis in Water by Purge and Trap (PTC) and Solid-Phase Microextraction (SPME)
Abstract Taste and odor are important to consumers when it comes to drinking water. Two compounds that are responsible for many taste and odor issues are geosmin and 2-methylisoborneol. Both of these compounds are produced by microbes and have very low odor thresholds. Because of this, many drinking water laboratories require detection levels of below 10ppt. Analysis of these compounds is usually ...
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The water and energy nexus
The water and energy nexus The interdependence between water and energy has been more widely recognized during the last few years. In the USA, the Energy-Water Nexus initiative was initiated in 2004 as an informal DOE (Department of Energy) National Laboratory project to develop a better understanding of the link between the nation’s energy and water supplies. The laboratories conducted ...
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Transient tests for locating and sizing illegal branches in pipe systems
In pipe systems illegal branches can take away remarkable water resources with negative effects from both the economic and technical points of view. Difficulties in pointing out illegal branches by means of steady-state pressure and discharge measurements are mainly due to the fact that, of course, such systems are not active according to a regular time schedule. In this paper the possibility of ...
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Drinking Water Analysis Guide
Public Water Systems (PWS), regulated by the United States Environmental Protection Agency (USEPA), provide drinking water to 90% of Americans. Water systems and laboratories testing drinking water for Safe Drinking Water Act (SDWA) compliance must be certified and must use USEPA approved methods, which are developed by the USEPA, other government agencies, universities, consensus method ...
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Experimental characterization of PVC-O pipes for transient modeling
The increasing use of plastic materials has modified several aspects of design and management of water distribution systems. With reference to the numerical modeling of transients, the definition of a correct rheological model of the pipe material is receiving an increasing interest. In this paper the behavior of the molecularly oriented polyvinyl chloride (PVC-O) pipes during transients is ...
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Leach Tests on Lime-Treated Clays
This paper describes the design, use, and results of a multiple leach-cell operation to test the changes in permeability and calcium removal of a lime-treated expansive clay under continuous water leaching. Seventy laboratory-prepared lime-treated clay specimens were subjected to continuous accelerated leaching for periods of 45 and 90 days with varying lime contents and compactive moisture ...
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Investigation of introducing water from an artificial recharge plant to an existing groundwater distribution system
ABSTRACTThe consequences of mixing water from the Arrenaes Artificial Recharge (AR) trial plant with groundwater from existing well fields have been investigated. The potential problems of interest are bacterial regrowth, precipitation of iron, and corrosion in the raw water distribution system. The AR trial plant is located on the Arrenaes peninsula on Zealand, Denmark. A large-scale production ...
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Use of the ferrates (FeIV–VI) in combination with hydrogen peroxide for rapid and effective remediation of water – laboratory and pilot study
In recent years, particles of iron in higher oxidation states (FeIV–VI), commonly called ferrates, have been presented theoretically as very effective oxidants. They can potentially be used for elimination of a wide range of organic and inorganic contaminants. However, so far the majority of applications have been carried out only as laboratory tests using model samples in many cases. The ...
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Turbidity Meters Available in Kenya
Nesvax Innovations now allows you to purchase a quality turbidity meter for less than Ksh.80,000. You can now test the turbidity of water in your laboratory, treatment plant or out in the field. The MI415 PRO is guaranteed to give you quality results. This device offers quick and accurate results. It is also very robust and easy to use. ...
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Research: Water-cooled ECU for laboratory - Case Study
A university research lab wanted to expand its infrastructure in the field of nanophotonics and approached Air Innovations for help. In response to their needs, we built a three-cubed, water-cooled air conditioner (each cube 26″ x 30″) with dry-steam humidification for an e-beam lithography tool. The tool will be used to support the research program led by one of the ...
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Hydraulic characterization and transient response of pressure reducing valves: laboratory experiments
A pressure reducing valve (PRV) regulates the outlet pressure regardless of the fluctuating flow and varying inlet pressure, thereby reducing leakage and mitigating the stress on the downstream water distribution network (WDN). Notwithstanding the crucial importance of PRVs, few experimental data are available in the literature. The aim of this paper is to overcome this gap by means of the ...
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Research paper: Algae control with ultrasound in a WTP
Algal blooms are a form of pollution that can harm water quality and increase operating costs at treatment plants due to the presence of toxic algae. These toxins are complex, odorless, and resistant to sterilization. To meet legal requirements and optimize costs, it is essential to control algal growth in treatment plants using surface water for drinking. One solution for controlling algae is ...
By LG Sonic
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Application of water pollution detector
Background: The (nitrate) link between agriculture and water quality is nutrient abundance - I've always thought the main issue was with fertilizers. Excessive nutrient loss often leads to eutrophication of surface waters. This condition can lead to harmful algal blooms (HAB), which produce dangerous toxins and cause a drop in dissolved oxygen, killing fish in both marine and freshwater ...
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Leak behaviour in pressurized PVC pipes
The correct definition of the leak law, i.e. the relationship between the leak outflow, the total head at the leak and other relevant parameters such as the pipe material, can seriously affect the accuracy of the numerical models used for the management of water distribution systems, either if they are used to forecast the leakage reduction by pressure management or to locate and size the leaks ...
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In situ and laboratory toxicity of coalbed natural gas produced waters with elevated sodium bicarbonate
Some tributaries in the Powder River Structural Basin, USA, were historically ephemeral, but now contain water year round as a result of discharge of coalbed natural gas (CBNG)‐produced waters. This presented the opportunity to study field sites with 100% effluent water with elevated concentrations of sodium bicarbonate. In situ experiments, static renewal experiments performed simultaneously ...
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Calibration of a passive, in situ, integrative sampler for monitoring of microbial biotoxins in aquatic environments
In this work, an integrative passive sampler based on a silicone membrane filled with a suspension of γ-Fe2O3 at pH 3.5 was developed. The novel device was calibrated for the measurement of microcystin concentrations in water. Laboratory calibration studies of the passive sampling devises under controlled conditions of temperature, water turbulence, and analyte concentration were conducted in ...
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Development and testing of a water-efficient laundry system in informal settlements of eThekwini municipality, South Africa
In the informal settlements of eThekwini municipality, South Africa, laundry activities are typically undertaken at local standpipes and washbasins of community ablution blocks (CABs), and are characterised by high levels of water consumption and greywater production. Since greywater contains a high pollution load, including sodium tripolyphosphate, it poses a significant environmental and public ...
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Modelling particle growth of calcium carbonate in a pilot-scale pellet fluidized bed reactor
Pellet fluidized bed reactors have been widely used to soften water. Reports from laboratory-scale research on the particle growth kinetics of calcium carbonate in pellet reactors have been put forward. However, the reports have not been comprehensive as they only consider the influence of supersaturation on the calcium carbonate growth process. The influence of three factors, namely, the ...
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