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TECHNOLOGYIN ACTION
Shining a light on water dechlorination Medium pressure UV systems offer a sustainable solution in food and beverage
Due to its ability to neutralise microbial organisms in municipal and industrial water applications, free chlorine is used widely as a simple, inexpensive and scalable solution for water disinfection. However, with sustainability becoming an ever-more important
factor in company strategy and decision making, the food and beverage industry is waking up to the downsides of using free chlorine as a solution. Without the need for chemicals and as an effective two-in-one solution for both water disinfection and dechlorination, increasing numbers of businesses are opting for medium pressure UV systems instead. This allows them to maximise efficiency and safety with a solution that’s not only effective, but environmentally friendly too. For mains water, residual chlorine is usually present to ensure
disinfection at the point of use. For food and beverage applications however, the elimination of chlorine is crucial during the pre-treat- ment phase so as not to affect the taste and smell of the products, while also helping to maintain delicate RO membranes in functional condition and protect piping from chlorine’s corrosive effects. Standard water dechlorination methods like granular activated
carbon (GAC) beds and sodium metabisulphite are popular but also carry notable disadvantages. Medium pressure UV is a relatively unknown solution by comparison but offers a superior dechlorination solution, particularly from an environmental perspective.
Water dechlorination using medium pressure UV lamp technology Medium pressure UV systems, or high intensity broad-spectrum UV systems, have been proven in their effective reduction of free chlorine in water with concentrations up to 5mg/l. To produce photochemical reactions that dissociate free chlorine and combined chlorine com- pounds, these systems emit UV light with wavelengths of 180-400nm. The only by-product, hydrochloric acid, is then removed with ease. UV systems help to reduce dependence on chemicals while min
imising associated labour and costs incurred by the removal of their residuals after dechlorination. The technology limits by-product for- mations caused by chemical additions and does not introduce any poor taste or odour compounds to the liquid being treated. Over time, due to incoming particulates and formation of fines, GAC
beds used for dechlorination can experience excessive pressure drop and exhaust their capacity for chlorine absorption. When this hap- pens, replacement and/or regular backwash cycles are required, adding time and costs to the dechlorination process. When combined with the absorption of organic matter, the porous structure
Evoqua
Contactus@evoqua.com
Driving Innovation with Universal Automation
technologies based on the principles of interoperability and universal automation allow us to react to volatile markets and deal quickly and efficiently with any changes in production environments. Moreover, they reduce waste by expanding the lifespan of hardware and im- proving circularity. According to both the ARC Advisory Group and McKinsey & Com-
pany, industry is yet to uncover key efficiencies estimated at be- tween $30bn and $100bn per year. However, this will only be possible if industry is digitally transformed and embraces collaboration. Some may suggest that breakthroughs in machine learning, aug-
mented reality, IIOT, and real-time analytics have made promising ad- vances in manufacturing, meeting the demands of our current digital world. However, in reality, industry remains trapped by vendor lock-in,
which limits machine-to-machine collaboration and the ability to in- tegrate these best-of-breed technologies.
In today’s industry climate, opportunities for innovation and creativity are drastically hindered by restrictive manufacturing equipment. Industrial engineers should be enabled by their equipment to cre-
ate value, drive efficiencies, achieve sustainable growth, and bring for- ward green initiatives across industry. Equipment that hinders this is simply obsolete. With up to 50% of industrial engineers wasting valu- able time by wrestling with this issue, change has never been more imminent. Industries require open technological frameworks, encouraging flu-
idity, change, and innovation. Technology must empower teams, en- couraging smarter, faster, and more sustainable manufacturing, bringing on a new era for industrial processes. Universal automation – interoperable, software-centric automation systems that share a common IEC 61499 runtime – is the solution.
The importance of industrial collaboration Change is inevitable and a part of life. The last few years have made that abundantly clear. While nobody can predict the future, emerging
6 JUNE 2022 | PROCESS & CONTROL 0
The key to a greener future These incompatibilities hinder industry from breakthrough innovations and cutting-edge products and solutions, like becoming pioneers of a net-zero future through low impact and carbon-neutral manufactur- ing. As the global economy strives towards a greener future, industry runs the risk of holding the planet back. Currently, industry is responsible for a staggering 32% of global car-
bon emissions. If the status quo were to be maintained, industry won’t be able to transition to sustainable models.
About
UniversalAutomation.Org UniversalAutomation.Org is a non-profit association managing the reference implementation of an industrial automation and shared source runtime.
To learn more, visit:
https://universalautomation.org/
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