ADVANCED TREATMENT
Flexible pump enables pilot trials
versatile mobile membrane filtration pilot plant, developed by hygienic fabrication specialist Axium Process, is helping the company’s customers run process evaluation trials across a wide spectrum of membrane technology. Axium says trials can take place at the company’s Swansea facility or on site, and can be used to treat process and waste streams by microfiltration, ultrafiltration (UF), nanofiltration (NF) and reverse osmosis (RO) membrane technologies.
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In designing for such a wide range of applications, Axium says it had to ensure that the performance of its pilot plant was not only reliable and accurate, but also flexible. The performance and versatility of the pump was especially critical. This requirement informed Axium’s decision to use the Hydra-Cell G10 – a seal-less positive displacement (PD) pump manufactured by Wanner Engineering. Projects manager, Steve Birkin, explained: “We chose the Hydra-Cell pump for our RO trials plant as we needed a pump that was able to give us a positive flow, but operating at a range of pressures by using a variable speed drive or inverter, enabling us to run tests under different conditions for a variety of customer trials.
“As we use the plant for NF as well as RO, the ability to operate at 15 bar to 60 bar is essential. We also needed stainless steel wetted parts and as pulse- free an operation as we could get.”
Smooth delivery and low pulsation are characteristics of the Hydra-Cell, with pumping action achieved through the sequential flexing of three
Axium’s mobile process evaluation plant uses the seal-less Hydra-Cell pump to deliver a range of membrane filtration treatment
hydraulically balanced diaphragms. The diaphragms also isolate liquid media from the drive end of the pump, allowing it to handle many different types of liquid including acids, caustics, thin non-lubricants, slurries, and liquids containing abrasive solids.
Mechanical seal wear is the most common reason for loss of performance in piston, gear and other seal-reliant PD pumps. As there are no dynamic seals in the Hydra-Cell pump, the risk is eliminated, so accuracy is consistently maintained. nnn
www.axiumprocess.com
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December 2010 Water & Wastewater Treatment 23
Water Recycling Waste 2 Energy
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