Environmental Analysis 35 Advanced Particle Characteris ation System for Water Treatment Operators
An advanced particle characterisation system from Malvern Instruments (USA) is being used to support water treatment plant operators in their optimisation of treatment processes, and is removing the need to wait for external laboratory results. Saving valuable resources, the Zetasizer Nano enables operators to easily measure and track the zeta potential (charge) of inflowing waters on site - hourly, daily, or across cycles, according to seasonal needs. These parameters are critical to final water quality and treatment plant efficiency.
Gregory Dehmlow, of Dehmlow Optimisation in the US, is a water treatment consultant specialising in plant optimisation. Mr Dehmlow said: “The
Malvern Zetasizer Nano allows operators to perform essential analyses in house, rather than having to rely on external laboratories. It is user friendly and treatment operators are comfortable with the functionality and reliability of the unit.”
“In the past, instruments measuring zeta potential have been rather difficult to work with outside of a laboratory setting. Following Malvern’s specified procedure and because of the ease with which the unit performs time and time again, operators readily accept this as part of their daily laboratory analysis. It is part of their routine in optimising and producing the highest water quality for their customers.”
The zeta potential of influent waters received by the treatment facility affects the formation of floc following the rapid mix or flocculation step during the treatment process. Different chemicals are added to disinfect the raw water, change the pH, and reduce the inherent charge to optimise coagulation. Samples are taken following each chemical application in order to analyse the water clarification process and track changes in parameters and optimise flocculation conditions over time.
As a water treatment consultant, Gregory Dehmlow recommends the Zetasizer Nano for characterising waters in the distribution system and to help determine whether treatment operations align with optimisation goals overall.
Reader Reply Card no 101 Looking into the Ground
Sewerin (Germany) sets new standards in locating underground pipes and cables with the UtiliTrac. Locating pipes is simple, even for unexperienced operators, thanks to the 3D pipe diagram and the automatic depth read-out. The trigger- controlled functions ensure comfortable and effortless work even when used over the full working day. Single trigger operation provides the user with intuitive and simple navigation through the menu. The frequency scan function is another advantage that makes a contribution towards easy pipe location.
For further facilitation in field use, the UtiliTrac folds and is carried in the generator´s case and can easily be transported by hand or compactly stowed in a vehicle thanks to its trend-setting ergonomic design. The case provides enough space to accommodate not only the generator with dual output jacks, but also the accessories.
The ability to trace two different, parallel pipelines with two different
frequencies by using the dual output jacks is a key advantage of the UtiliTrac compared to competitive products on the market today.
As an alternative to the generator built into the carrying case, the more powerful Generator G1 from the SEWERIN product range can be used. This generator significantly increases the operation range.
Reader Reply Card no 102
New Nitrate Test, a Safe Alternative to the Cadmium Reduction Method
CHEMetrics (USA) now offers a sensitive, ampoule-based, cadmium free method of measuring nitrate in water. The new Zinc Reduction Method eliminates the use of cadmium, improving safety and reducing hazardous waste concerns. As always with CHEMetrics test kits, there’s minimal potential for chemical exposure. This field portable kit, which can even be used with seawater, contains everything needed for performing 30 tests.
Contact us for more information on this and all CHEMetrics products or contact the technical service team for advice on how to choose application
specific tests or how to customise a kit for your specific water testing needs.
CHEMetrics manufactures portable water analysis kits for quantitatively measuring more than 50 essential analytes, either by visual color comparison or with an instrumental finish. For 40 years, CHEMetrics has been committed to providing products that are easy-to-use, accurate, timesaving and cost effective.
Reader Reply Card no 104 New Global Standards Catalogue Released
All AccuStandard (USA) catalogue products are now available in a single catalogue, the Global Edition Catalogue. This 450 page product catalogue includes all of the 11,000 products from the traditional Organic, Inorganic, International, Petroleum and Plastics catalogues.
Included are over 900 new products that have never previously been included in any catalogue. These include reference standards for new EPA, EU, ASTM and UOP methods, reference mixes for specific analysers, and many new singles for PBDE and Pesticide analysis. Many of these standards are exclusive and available only from AccuStandard.
All products are manufactured under quality systems certified to both ISO 9001:2000 and ISO 17025, and in full compliance with all applicable explosive and drug regulations. All products ship with a lot specific Certificate of Analysis.
Reader Reply Card no 105 Reader Reply Card no 106
• No sample preparation required • Fast - 5 minutes per sample
• High capacity autosampler with 70 locations • Full compliance with EPA Method 7473 • Runs both Solid and Liquid Samples • Unparalled support
Don’t settle for just any Mercury Analyzer.
Go with the experts in Hg Analysis.
Visit
www.LeemanLabs.com/Hg or call 1-603-886-8400 today!
Drinking Water Probe for Cold Low Conductivity Waters
With the many variations seen in the quality of drinking water in different regions, there are occasions when a standard pH electrode proves to be unsuitable for measuring the pH quality of the water. Sentek (UK) have done a great deal of research with different types of glass, and also reference systems, which has enabled them to come up with an electrode which does meet this criteria. The P11 Drinking Water Probe is ideal for particularly cold low conductivity water of low ionic strength.
Reader Reply Card no 103
Mercury Analysis Made Simple. Just add your sample. Hydra-C will do the rest.
August/September 2010 AET
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