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PUMPS, VALVES & ACTUATORS FEATURE THE SHAPE OF THINGS TO COME IN SLUDGE BLENDING


Mixing sludge in a rectangular tanks is often problematic, but a Börger pump has successfully improved the blend at Anglian Water’s Cliff Quay WTW


C


liff Quay Wastewater Treatment Works has improved the blend of


liquified sludge and cake for Anglian Water’s anaerobic digestion (AD/biogas) process thanks to the installation of a Börger pump. Working alongside Anglian Water and


engineering company Panks, Börger has also helped meet the challenge of mixing a rectangular tank that was proving too difficult for existing equipment. Jon Hooper, Cliff Quay treatment


manager for Anglian Water, said: “As well as bringing about a better, more consistent product to feed the AD process, Börger and Panks have effectively helped us solve a problem without needing to install a new tank.” He continued: “Mixing sludge in a


rectangular tank is always a difficult task, but a paddle mixer at the deep end had difficulty coping with the solids, while the vortex pump at the shallow


end of the tank (20m by 10m, 550m3 )


kept air-locking.” To put the Börger EL rotary lobe pump


to the test – and ensure that a new set- up would work for Anglian Water - Panks first tried pumping through the existing pipework, but there was too much pressure at the jet end.” Chris Bone, contracts manager at Panks,


explained: “We then tried with some temporary pipework in a different configuration and this mixed the tank much, much better. “Despite the considerable limitations of a


rectangular tank, there was no doubting the capability of the Börger pump, so together with Anglian Water, we agreed to install additional stainless-steel pipework with three injection points at strategic locations.” Now, with cake that comes in at 17%


solids, with the surplus activated sludge (SAS) at approximately 3% to 4%, Anglian


TAKING THE BEST ROUTE TO PRODUCT INNOVATION


It’s common knowledge that to remain successful, a company must innovate. But what does innovation actually mean? Is disrupting the status quo and discovering brand new products or processes the only way to innovate? Or can being innovative mean something subtler; for example, making an already good product even better? Lesley Eaton, marketing executive for SEEPEX UK, explains why fostering an ongoing supportive climate is more valuable than a single great idea when it comes to encouraging innovation. Innovation drives our company forward. We have a joined-up approach to innovation, with a dedicated


technology and innovation department comprising R&D, innovation strategy, engineered solutions, and product and industry management, with each area being interlinked. This type of framework only pays dividends if a company also fosters a supportive staff culture. In real


terms, this means: • Having an open mind – There’s no such thing as a bad idea. • Being patient – Don’t expect instant results. • Learning from your experiences – If your idea isn’t perfect, think about what you can do differently. • Collective ownership – Take a team-based approach to innovation. • Collaboration – Work together with colleagues, end-users and the wider market to discover what is needed. Collaboration is central to our innovation strategy at SEEPEX; so much so that we have nurtured a Growth


Alliance, which includes client-facing members of staff who are brought into the design process along with our engineering and design teams, to ensure we know what the industry needs and to understand its challenges. Once a supportive culture is in place and a framework to support the development of any new ideas has been established, it’s time to think about how your company can truly innovate – think about the problems your customers face and how you can help to solve them, driving the industry forward as you do so. • The same but different – Innovation can be as simple as using the same product in a different application. • Do things better – Think about how you can make your existing product range even better by listening to


your customers and the wider industry. Although PC pumps are an established technology, we believe there are always ways to improve and extend their capabilities. With the advent of Industry 4.0, we have made a conscious effort to improve upon our existing pump range by incorporating ‘smart’ features into our products such as sensors to adjust pump speed as process conditions change. Our Smart Conveying Technology is up to 20% more energy efficient than traditional PC pump designs. • Explore alternative solutions – If your existing range has limitations, don’t be afraid to stretch and explore


other options to find a solution to your customer’s problems. For example, although PC pumps were a good solution for the treatment of dewatered sludge, discharge pressures were becoming a limitation. We realised we needed to do things differently, so we developed a new system to improve dewatered sludge handling – our Smart Air Injection (SAI) system. This combination of progressive cavity pump and dense phase conveying technologies is capable of conveying dewatered sludge over 1,000m. SEEPEX


www.seepex.com


Börger and Panks have helped Anglian Water overcome the mixing challenges without needing to install a new tank


Water is able to achieve the optimum level of 8% solids – without the previous air- locking and burn-out issues. Anglian Water’s Jon Hooper added: “The


mix of cake and liquified sludge is quite gritty, but since the installation by Panks of the new Börger pump, we’ve successfully improved the blend – which is quite an achievement with it running 24/7 and dealing with such high volumes – around 35 tonnes per day.”


Börger UK www.boerger.com


OPENING UP POSSIBILITIES


Wanner’s new Hydra-Cell MT8 triplex diaphragm pump can achieve a minimum flow rate of 0.227l/h with the accuracy, linearity and repeatability demanded by API 675, but is capable of generating a maximum flow of 30.28/h. The pump is designed to perform at pressures to 241 bar, while generating a smooth virtually pulse-less flow for homogeneous metered injection. With no cups, packing or seals to leak


and its ability to handle a range of aggressive and abrasive liquids and even run dry without damage, the MT8 is suited to many applications. Examples include methanol injection in the oil and gas industry, personal care products and pharmaceuticals, food and beverage processing and additive injection in polyurethane foam production. The use of PTFE diaphragms, along


with the availability of a range of pump head materials, means the MT8 is suitable for metering hazardous liquids. The replenishment valve system in every piston ensures optimum actuating oil on every stroke for continuous accuracy and protects the pump from damage due to a blocked suction line. With features for installation


flexibility and a range of electronic and manual control options, the Hydra-Cell MT8 opens up many new possibilities for chemical metering and injection. www.hydra-cell.co.uk


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PROCESS & CONTROL | JUNE 2019 33


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