Journal cover Journal topic
Drinking Water Engineering and Science An interactive open-access journal

Journal metrics

  • CiteScore<br/> value: 0.79 CiteScore
    0.79
  • SNIP value: 0.813 SNIP 0.813
  • SJR value: 0.228 SJR 0.228
  • IPP value: 0.719 IPP 0.719
Drink. Water Eng. Sci., 10, 45-52, 2017
https://doi.org/10.5194/dwes-10-45-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
06 Jul 2017
Quantity and quality benefits of in-service invasive cleaning of trunk mains
Iftekhar Sunny1, Stewart Husband1, Nick Drake2, Kevan Mckenzie2, and Joby Boxall1 1Pennine Water Group, Department of Civil and Structural Engineering, University of Sheffield, S1 3JD, Sheffield, UK
2Scottish Water, Juniper House, Heriot Watt Research Park, Edinburgh, EH14 4AP, UK
Abstract. Trunk mains are high risk critical infrastructure where poor performance can impact on large numbers of customers. Both quantity (e.g. hydraulic capacity) and quality (e.g. discolouration) of trunk main performance are affected by asset deterioration in the form of particle accumulation at the pipe wall. Trunk main cleaning techniques are therefore desirable to remove such material. However, little is quantified regarding the efficacy of different maintenance interventions or longer-term changes following such cleaning. This paper presents an assessment of quantity and quality performance of a trunk main system pre, post and for 12 months following cleaning using pigging with ice slurry. Hydraulic calibration showed a 7 times roughness height reduction after ice slurry pigging, evidencing substantially improved hydraulic capacity and reduced headloss. Turbidity response due to carefully imposed shear stress increase remained significant after the cleaning intervention, showing that relatively loose material had not been fully removed from the pipe wall. Overall the results demonstrate that cleaning by pigging with ice slurry can be beneficial for quantity performance, but care and further assessment may be necessary to realise the full quality benefits.

Citation: Sunny, I., Husband, S., Drake, N., Mckenzie, K., and Boxall, J.: Quantity and quality benefits of in-service invasive cleaning of trunk mains, Drink. Water Eng. Sci., 10, 45-52, https://doi.org/10.5194/dwes-10-45-2017, 2017.
Publications Copernicus
Download
Short summary
This paper presents an assessment of quantity and quality performance of a trunk main cleaning using ice slurry pigging intervention. Hydraulic calibration showed a 7x roughness height reduction after ice slurry pigging, although turbidity response due to carefully imposed shear stress increase remained significant, indicating loose materials had not been fully removed from the pipe wall. Due to ongoing material accumulation, one-off intervention may not be sufficient to manage the quality risk.
This paper presents an assessment of quantity and quality performance of a trunk main cleaning...
Share