WET News

MARCH 2016 WET NEWS 23 RELIABILITY EFFICIENCY SOLUTIONS EXPERIENCE INNOVATION Compressed air, gas and vacuum solutions www.aerzen.co.uk +44(0) 208 502 8100 sales@aerzen.co.uk 1/2 page advert design.indd 2 17/11/2015 18:09 THE CONCEPT • Continuous water analysers measure samples online with the readings automatically relayed to a central monitoring system • The resulting data is then used for process control and reporting purposes • This helps to eliminate the delays and uncertainties associated with extracted testing methods NEED TO KNOW 1 The efficiency and accuracy of the measurements provided by continuous water analysers is only as good as the condition of the analyser itself 2 A maintenance strategy should be devised in which many aspects of the analyser are checked including but not exclusive to reagent levels, sensors and display units 3 The lifecycle of a product should always be considered THE VERDICT "Through planning an effective maintenance strategy, complete with a lifecycle plan, end users should experience peak level performance of their continuous water analyser system" Dr Jonathan Farrington, ABB Measurement & Analytics Service Having a preventive maintenance regime in place for your installed instruments can help stop faults occurring and extend their operational life conditions inherent in many installations. In wastewater treatment processes in particu- lar, sensors can quickly become fouled by the build-up of organic matter. It is worth checking sensors regularly to ensure they are free from obstructions and/or damage that could hinder their performance. In addition, manufacturers set recommendations regarding the replacement of any key com- ponents. Depending on the type of analyser and the application it's used in, this may include changing tubing, measurement cells and seals as well as dia- phragms on a yearly or bi- annual basis. In most cases, the frequency of maintenance checks will be dictated by the nature of the process itself and the parameter being measured. One way to design an effective mainte- nance routine is to refer to the nature and frequency of past breakdowns, together with any issues that have been recorded, such as fouling, abrasion or measurement variations. For sites covered by the Envi- ronmental Permitting Regula- tions (EPR), the Urban Waste Water Treatment Directive (UWWTD) and Operator Self- Monitoring (OSM), there is an added requirement for opera- tors to have their sites inspected annually by the Environment Agency. These inspections pay par- ticular attention to a site's water sampling arrangements, mak- ing it vitally important to be able to prove that equipment has been properly maintained. Another factor that can affect the way that an analyser is maintained is where it sits in its lifecycle. This should take into account the model, age and make of the analyser. Models at the start of their product lifecy- cle will be well-supported, with ready spares obtainable, whereas older product ranges may not have spares and exper- tise so readily available. Dealing with reputable man- ufacturers helps as they are more likely to be able to support older products or recommend a suitable upgrade path. ABB's own lifecycle service agree- ments cover everything from on-call support through to pre- dictive, preventive and correc- tive maintenance services, multi-engineer resident service contracts and complete mainte- nance outsourcing. These agreements can be custom- built to supplement your in- house expertise and provide the additional capabilities you need to keep asset performance and availability high. The important role played by continuous water quality ana- lysers in safeguarding the qual- ity of both potable and treated waste water makes it critical to ensure they're kept in top work- ing order. Following the steps outlined in this article will pro- vide a useful starting point for helping to design an effective maintenance strategy. n Dr Jonathan Farrington is technical manager for ABB Measurement & Analytics Service in the UK. Accessorize your pump hire • Temporary installations • Environmental products • Cost effective solutions When pumps are needed to move water, wastewater or sludge, selecting the correct hoses and accessories is essential to ensure that tasks are carried out safely and efficiently. The comprehensive Sykes Pumps range ensures that, whatever the application, you can hire what you need. A Accessories available for hire include: hoses, fittings, control panels, settlement tanks, drip trays, fuel tanks, road ramps, venturi jet aerators and many more. The Sykes Pumps range of hoses and accessories has been selected to complement the full range of pumps available for hire, meaning you can source everything you need from one supplier, reducing purchasing time, paperwork and cost.

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