38 Water/Wastewater Advanced Particle Characterisation System for Water Treatment Operators
An advanced particle characterisation system from Malvern Instruments (UK) 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.
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New Tide Gauge Promises High Performance & Low Cost
Valeport (UK) announces the launch of TideMaster, a compact Water Level Recorder, designed for use in a wide range of fixed or portable survey and tide monitoring operations. Suitable for use in fresh or salt water, the TideMaster is highly accurate and can be deployed for up to a year at a time.
Sales Manager, Kevin Edwards, commented, “TideMaster is an extremely versatile and cost effective new product. It replaces the popular Model 740 and whilst it retains the easy to use features of the Model 740, a lot more enhancements have been made with further provision for additions in the future”.
Low power consumption, with both pre-programmed and a user selectable sampling regime, allow for up to a year of autonomous operation, whilst optional telemetry packages provide capabilities for real time operation. As well as recording water level, TideMaster can be provided with an optional ultrasonic wind speed and direction sensor to record meteorological data.
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TideMaster can be set up and data retrieved via an optional control/display panel that uses OLED technology, Bluetooth and an SD memory card. Alternatively, it can be plugged into a PC and controlled using Valeport’s Windows based software, TideMaster Express. This allows the user to download and display recorded or real time data from single or multiple gauges. TideMaster is also compatible with a wide range of Hydrographic software and tools on the market.
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• Improves Laboratory Efficiency • Superior CVAFS Hg Detector • Intuitive Software Interface • Integrated & Compact • Fully Programmable Analysis Cycle • Free Expert Technical Support
Oil in Water Monitors Shipped to USA
Chelsea Technologies Group (UK) was asked by BP to provide sensors to monitor the amount of oil in the water, following the disaster in April which is continuing to blight the American coastline.
The firm, which employs 38 people, has already produced anti-
warfare equipment for submarines and has been tasked by the UK and United States governments to help tackle terrorism.
Managing director Brian Phillips said: "We were contacted directly by BP and some of the companies working for them. They are very concerned that when most of the oil is removed from the surface there will still be some in the water and on the beaches. They want to know that all the oil is gone and this technology can detect down to very low levels."
Dr Brian Phillips, Managing Director, Chelsea Technologies group pictured with two of the submersible fluorimeters used for the detection of crude and refined oil.
The instruments, known as hydrocarbon fluorimeters, work by
shining light at a material and taking a reading by the amount that bounces back. They are likely to be used for some time as monitoring for oil companies becomes a legal requirement, and staff from the firm are set to fly out to Texas in the next four to six weeks to help. Dr Phillips estimated it would be more than 12 months before levels are brought down but is confident the area will eventually return to normal.
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IET
Annual Buyers Guide 2010
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