How a bespoke equipment frame ensured an uninterrupted supply of high purity water
Derriford Hospital’s busy laboratory provides a wide range of analytical and testing services including haematology, immunology, biochemistry and molecular biology. The laboratory’s state-of-the-art analytical equipment is dependent on a constant supply of high purity water. The lab requires up to 300 litres per hour of bacteria free water meeting CLSI (Clinical and Laboratory Standards Institute) Type II clinical laboratory reagent water (CLRW) quality standards. This means resistivity >10MΩ.cm, TOC <50ppb and bacteria <10cfu/ml.
The laboratory had an existing water purification system which was becoming unreliable and needed to be replaced. The difficulty being, that, because of the need for 24 hour laboratory services, the purified water supply could not be interrupted during the replacement work. Space was a further key issue, with only a small cupboard at the end of the laboratory available to house the system.
Veolia’s standard MedicaPro range, which combines a range of treatment technologies including reverse osmosis, ultraviolet disinfection and continuous electrodeionisation, was the obvious choice to meet the Type II water quality standards. Although Veolia’s product range includes a single treatment unit capable of delivering the required flow rate, the restricted space was insufficient to accommodate it.
Space was an issue with this system, with consideration needed for regular service and maintenance as well as daily operation. Veolia’s Engineering team resolved this by installing a compact frame which housed three smaller MedicaPro 120 units operating in parallel, each feeding a 300 litre capacity tank. Veolia designed and manufactured a bespoke frame for all the equipment which included a sliding base for each Medica to allow it to be pulled out of the cupboard for servicing.
Water is pumped from each tank to the points of use via a 0.2µm cartridge filter to ensure microbiological purity. Although the cupboard was small in area, the three Medica systems fitted side by side and with sufficient height it allowed the tanks to be installed above them. That left just enough room for three pumps and associated filters to be installed one above the other.
The end result was than innovative solution that fitted in a cupboard measuring approx 1m x 2.5m.
Lead Biomedical Scientist, Tony Cambridge was pleased with the result. “The units are very user friendly and Veolia’s frame design makes access to them easy.”
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