SPECIAL WORKS
Siltbuster facilitates essential reservoir repairs during UK lockdown
Siltbuster, the UK's leading water treatment specialist, has developedandmobiliseda large modular water treatment system for Lews Civils as part of its essential infrastructure improvement work at a Welsh Water reservoir near Caernarfon in North Wales.
The work, being undertaken by Lewis Civils, involved drilling, which generated fine rock particles and raised the suspended solids content of the water. Further to this, the pH of the water was elevated because cement and limestone grout was used in and below the reservoir’s retaining wall. Both cement and limestone are a threat to aquatic life, so needed to be treated before the water could return to the environment.
Tankering was initially considered, but was quickly deemed socially and environmentally unsustainable, primarily due to the implications of running many heavy tankers into such a remote part of Wales. In addition, the cost of this type of off-site disposal was
prohibitive, with each tanker costing around £1,000.
With this in mind, Siltbuster was called in by Lewis Civils to safely treat the large volumes of high pH and solid-laden wastewater being generated, before it could then be released back into the local watercourse. The solution was a three-stage modular chemical treatment system, comprised of a chemical dosing container, large 30m3 multistage reaction tank and three HB50M lamella clarifiers in parallel. By measuring the water quality parameters at the inlet of the system - total suspended solids and pH - chemicals were only used when necessary. This saved money, increased efficiency and reduced carryover.
This temporary treatment system was deployed and installed in April, during the first national coronavirus lockdown, ensuring the site was environmentally protected at all times.
John Gregson, Senior Site Manager at Lewis Civils, comments: “This project was located in a
National Park and so environmental compliance was of critical importance to us. With the operational period running for several months, we were impressed with the responsiveness of Siltbuster. It had the equipment readily available within its large rental fleet and the engineer support was present even during the heavy restrictions. We’re happy to say the weekly inspections of the site by Welsh Water all went well, confirming that the stringent water quality criteria had been met.”
James Baylis, Regional Technical Sales Engineer for Siltbuster, concludes: “At Siltbuster, we provide support to a number of essential services such as the construction, municipal and industrial sectors, meaning we have continued to be operational throughout the pandemic. By adhering to social distancing guidelines and stringent safety measures, we have been able to help support many projects across the UK during lockdown, just like we did at Caernarfon for Lewis Civils.”
Online. In your pocket. On the App store.
draintraderltd.com/magazine
46 | March 2021 |
www.draintraderltd.com
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80
