Water & Wastewater Asia November/December 2020

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26 FOCUS Figure 2: SUEZ Netscan user interface, focuses on network characteristics and leak history With the help of Netscan, the ePulse data was extrapolated to the remainder of the CI mains, which in turn generated a specific value for each pipe segment to interpret the likelihood of failure, and subsequently, the risk of failure. Netscan is an innovative asset management tool based on a collaborative web platform that maximises the benefits of pipe investment plans. It uses advanced modelling and predictive analysis to prioritise pipe renewal. Figure 3: Remaining service life per pipe degradation In order to determine the LoF, SUEZ employed a linear extension of the Yule model. The parametric nature of this model used eight years of historic burst data for rounds of calibration and validation, which was combined with various other parameters, before arriving at a LoF forecast. Concurrently, a consequence of failure (CoF) model was developed with PUB’s water supply network team to identify CoF criteria and its associated weighting. Thereafter, an individual CoF score for each pipe segment was computed and attributed to the model. Finally, the consequence of failure was converted to a likelihood of failure threshold, used to determine the risk of failure. Of the 80km of CI pipeline tested using ePulse, the field crew identified approximately half had lost more than 30% of its original wall thickness. This data was then extrapolated to the entire 450km data set, and likelihood of failure analysis was performed. By integrating the result gathered with the consequence of failure, the crew was able to determine which pipe segments had exceeded its risk threshold, and therefore needed to be replaced. PUB was able to use the results to develop a comprehensive pipe replacement programme over the next five years. A significant percentage of the original CI network planned for replacement were able to be deferred as the pipes were still in good condition. The project also revealed five potential Point of Interest (POI) within the surveyed network, with the use of LeakFinderST ® correlators. The field engineers made recommendations for a follow-up investigation to be carried out to confirm the leak presence. A failure risk analysis, which combines CDAM and AMDM, proves to be an extremely effective tool when it comes to determining asset renewal and replacement needs. The seamless integration of technologies - ePulse and Netscan, has empowered PUB to make informed decisions on its underground pipe network, enabling continued provision of a reliable and sustainable water supply to its customers now and into the future. November / December 2020 • waterwastewaterasia.com
FOCUS 27 According to the Organisation for Economic Co-operation and Development (OECD), water demand in manufacturing is only expected to increase. By Natalie Chew The topic of water reuse is not a new one, in the age of climate change and an increased scramble for limited resources. Even now, trends point toward more and more industries seeing water reuse as an essential part of their operations, and the OECD predicts that water demand in manufacturing is expected to increase by 400% by 2050. Water & Wastewater Asia (WWA) talks to Eric Lai, business managing director for industry, Grundfos China, to find out more about these changing trends and how the industry will likely accommodate them. Eric Lai, Business Managing Director for Industry, Grundfos China WWA: What can you tell us about the trends in industrial water reuse? LAI: Increasingly, industry players are recognising that their operations will only get more water intensive as we move into the future - water reuse, and subsequently wastewater treatment, will play an integral role for the future of our water security. We foresee digitalisation playing a key part in taking industrial water reuse to the next level. This is because as industries evolve, wastewater produced becomes increasingly complex. For example, the growth of the electronics industry now poses new challenges when it comes to treating wastewater, because they contain compounds and contaminants that have never been in industrial wastewater before, such as exotic metals. As a result of these challenges, wastewater treatment will become increasingly complicated, and in turn demand greater manpower and accuracy to adequately manage the entire process. This translates to opportunities for greater digitalisation and automation throughout the operations – through metering devices, tracking devices and automated analytical procedures. WWA: What are some of the benefits of industrial water reuse? LAI: For certain industries, reusing wastewater can benefit them economically by supporting a circular economy. Wastewater and its discharged sludge contain a great number of valuable resources such as nitrogen, phosphorus, energy, and other nutrients that can be recovered and reused, achieving the overall objective of resource efficiency. By treating used water back to a usable quality and then feeding it back into a company’s water cycle, its operations will essentially be closer to moving away from its reliance on one-time use and shifting towards a more sustainable method of handling water. WWA: What are some challenges that might arise from industry players adopting water reuse for sustainable cooling? LAI: Industrial cooling towers have special needs and requirements to the water they use. If the water does not fulfil the requirements in terms of chemical and biological parameters, the operation can be costly, ineffective and, in case of high biological contamination, even dangerous. Because of its original pollutants, when water is reused, the potential for biological regrowth is extremely high, even if the treatment is tightly controlled. Water November / December 2020 • waterwastewaterasia.com
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Page 9 and 10: THE NEWS 7 Bentley Systems announce
Page 11 and 12: THE NEWS 9 Gradiant acquires Sigma
Page 13 and 14: THE NEWS 11 Hach acquires Arachem
Page 15 and 16: THE NEWS 13 For Memsift, the partne
Page 17 and 18: THE NEWS 15 Veolia wins $183 millio
Page 19 and 20: IN THE FIELD 17 How the FG module w
Page 21 and 22: IN THE FIELD 19 WaterGEMS prioritis
Page 23 and 24: IN THE FIELD 21 Bentley’s WaterGE
Page 25 and 26: IN THE FIELD 23 Xylem’s SurgeView
Page 27: FOCUS 25 In recent years, PUB has a
Page 31 and 32: FOCUS 29 WWA: What did you have to
Page 33 and 34: FOCUS 31 The pineapple fibres only
Page 35 and 36: FOCUS 33 There is a critical mass o
Page 37 and 38: FOCUS 35 1POOR INCENTIVES FOR WATER
Page 39 and 40: VIEWPOINT 37 NO SERVICING AES syste
Page 43 and 44: VIEWPOINT 41 By renting out cylinde
Page 45 and 46: VIEWPOINT 43 . DECLINE IN TREATMENT
Page 49 and 50: HOTSEAT 47 technology across indust
Page 51 and 52: SWA Technical Briefing: PUB BIM e-C
Page 53 and 54: SWA Virtual introducon: Overview of
Page 55 and 56: ON OUR RADAR 53 Easy configuration
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Page 59 and 60: ON OUR RADAR 57 A COMPLETE PROCESS
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Page 63 and 64: SNEAK PEEK 61 The Kingdom of Cambod
Page 65 and 66: 2020 NOVEMBER 2020 Singapore Intern

Water & Wastewater Asia November/December 2020

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