PODDS Related Company Publications

1: June 2016 - Scottish Water Vision magazine "...£15 million saving..."

2: September 2016 - Northumbrian Water in Water & Wastewater Treatment "...90% capital cost saving..."

Phosphate Dosing: Investigating Water Quality Impact in Distribution Systems. As the water sector progresses towards lead pipe free distribution and premises systems it was suggested that the internationally unique pipe loop system at the University of Sheffield is ideally suited to investigate the impacts of phosphate dosing in real systems, including the microbiological and associated water quality aspects such as discolouration. This document sets out initial thoughts on what could be done.

Understanding and Managing Metals & Organics through Reservoirs and their Impact on Distributed Water Quality. This project proposal aims to understand the fate and transport of metals and organics from the treatment works through the water distribution network so that appropriate and cost effective management strategies can be implemented. Specifically, the study seeks to identify how and when different source and sink behaviours occur and how final treated water quality influences these behaviours.

Discolouration and Chlorine Research in Drinking Water Distribution Systems - This report details the research developed in conjunction with the PODDS V project by The University of Sheffield and Dwr Cymru Welsh Water (DCWW). The primary aim of this project was to explore in detail the impact of chlorine concentrations upon biofilm structure, accumulation and mobilisation behaviour in drinking water distribution systems (DWDS). This was to be undertaken in the University of Sheffield’s internationally unique pipe-loop research facility. In addition field trials were conducted to compliment the laboratory work with a view to investigating disinfectant residual impact upon material accumulation / regeneration rates in trunk mains.

Regulating Discolouration in the UK. This document has been produced to stimulate discussion regarding the current regulation of discolouration related issues in the UK. It attempts to capture some key aspects that havearisen during PODDS events. The questions raised are substantive and potentially controversial.

PODDS VI Project Proposal, August 2015. Tactical and Strategic Discolouration Management: Through a nationally coordinated set of scientific drinking water distribution system (DWDS) trunk main studies involving a consortium of water suppliers, discolouration behaviour will be investigated and evidence based pro-active tactical and strategic operational tools and strategies developed and validated. Individual site study results will be directly applicable and of benefit to those specific sites, whilst co-ordinating results across the consortium will allow development of a nationwide database to help understand the factors influencing regeneration. This project officially commenced 1st December 2016.

PODDS V Project Summary 2015. The PODDS V research project has been hugely successful in bringing together multiple aspects of research. Increased scientific knowledge from nationwide and laboratory studies has resulted in cost effective and efficient operational strategies that improve asset performance in water distribution systems with regards to safeguarding water quality. The work and subsequent impact has been recognised academically, by water practitioners internationally and the Drinking Water Inspectorate (DWI). This has only been possible with the active participation of project members helping organise trials that consistently demonstrate the hydraulically manageable and predictable discolouration behaviour whilst facilitating identification of governing processes.

DWI Presentation, June 2015. The DWI invited the PODDS group to London to present our research. It was commented by the organisers that 29 (out of 40+ staff including clerical) was best turnout to date for this type of dissemination event

REF 2014 The Research Excellence Framework (guide). REF is the new system for assessing UK Universities' research. PODDS was submitted as an Impact Case Study and subsequently showcased (1 of only 5 from 514 case studies) as an excellent example of contributions by engineering research to the better provision of public services in a report prepared by Technopolis with the EPSRC, Royal Academy of Engineering and overseen by Professor John Fisher CBE FREng; "Assessing the economic returns of engineering research and postgraduate training in the UK".

NTU Equivalence - set of plots that demonstrate how turbidity correlates with iron and manganese from national and international PODDS trials.

PODDS Flow Cytometry protocol. A protocol has been written (by Kat Fish and Stewart Husband) that uses sodium ascorbate for dechlorinating. Sodium ascorbate has been selected as it is basically Vitamin C so is safer to handle, store etc, AWWA approved and not an oxygen scavenger like sodium thiosulphate.

PODDS GUIDING PRINCIPLES - based on over a decade of industry leading international research. Includes key innovative priorities for developing efficient, cost-effective pro-active discolouration management strategies and a flowsheet methodology for identifying and prioritising trunk main conditioning.

Some examples of PODDS mediated savings are highlighted in table (click table to get pdf document)



PODDS Epanet model parameters can be seen here.

PODDS Epanet Model and PODDS Epanet Manual (2009) available here.




Inaugral meeting 29th October 2015, University of Sheffield: Agenda, presentation and minutes

Second meeting 19th January 2016, University of Sheffield: Agenda, presentation and minutes

Third meeting 14th April 2016, University of Sheffield: Agenda, presentation and minutes

Fourth meeting 3rd Augustl 2016, University of Sheffield: Agenda, presentation and minutes. Additional presentaion from Atkins (on behalf of Severn Trent Water) detailing a very large and intensively monitored successful conditioning exercise increasing flows from 25ML/d to 40ML/d as part of the Birmingham Resilience Project. Scottish water June 2016 'Vision' customer magazine, including a report on PODDS.

Fifth meeting 3rd November 2016, University of Sheffield: Agenda, presentation and minutes

Sixth meeting 7th February 2017, University of Sheffield: Agenda, presentation and minutes

Seventh meeting 9th May 2017, University of Sheffield: Agenda, presentation and minutes

Eighth meeting 14th September , University of Sheffield: Agenda, presentation and minutes





S. Husband, J. Boxall (2017) 'Real time modelling of pipe wall material and managing the discolouration risk in distribution systems" WQT_2017, Portland, Oregon

I. Sunny, S. Husband, G. Moore, N. Drake, K. Mckenzie, and J. Boxall. (2017) 'Discolouration Risk Management and Chlorine Wall Decay" CCWI_2017, Sheffield

D.M. Cook, P.S. Husband (2017) 'Rusby Wood a Smart Network for Sustainable Discolouration Risk Reduction' CCWI_2017, Sheffield

I. Sunny, S. Husband, N. Drake, K. Mckenzie, and J. Boxall. (2017) 'Quantity and quality benefits of in-service invasive cleaning of trunk mains" Drinking Engineering Science, 10, 1-8 https://doi.org/10.5194/dwes-10-1-2017

S. Husband, J. Boxall (2016) 'Corrosion and Water Quality" Water & Sewerage Journal 96, pp 42,43

S. Husband, J. Boxall (2016) 'Understanding and Managing Discolouration Risk in Trunk Mains' Water Research, Vol 107, pp127-140 doi.org/10.1016/j.watres.2016.10.049

S. R. Mounce, E. J. M. Blokker, S. P. Husband, W. R. Furnass, P. G. Schaap, J. B. Boxal (2016) 'Multivariate data mining for estimating the rate of discolouration material accumulation in drinking water systems' Journal of Hydroinformatics, 18, 96-114. DOI: 10.2166/hydro.2015.140

Blokker, E. J. M., Furnass, W. R., Machell, J., Mounce, S., Schapp, P. G. & Boxall, J. 2016. Relating Water Quality and Age in DrinkingWater Distribution Systems Using Self-Organising Maps. Environments [Online], 3, 10 DOI:10.3390/environments3020010

Fish, K., Osbourn, A. & Boxall, J. (2016). Characterising and Understanding the Impact of Microbial Biofilms and the Extracellular Polymeric Substance (EPS) Matrix in Drinking Water Distribution Systems. Environmental Science: Water Research & Technology. DOI: 10.1039/c6ew00039h

Husband, P. S., Fish, K., Douterelo, I. & Boxall, J. (2016). Linking discolouration modelling and biofilm behaviour within drinking water distribution systems. Water Science & Technology: Water Supply, 16.4, 942-950 DOI: 10.2166/ws.2016.045

D.M. Cook, P.S. Husband & J.B. Boxall (2016) 'Operational management of trunk main discolouration risk' Urban Water Journal DOI: 10.1080/1573062X.2014.993994

Mounce, S. R., Mounce, R. B. and Boxall, J. B. (2016). Case-based reasoning to support decision making for managing drinking water quality events in distribution systems. Urban Water Journal. 13 (7), pp. 727-738

Mounce, S. R., Gaffney, J. W., Boult, S. and Boxall, J. B. (2015). Automated data driven approaches to evaluating and interpreting water quality time series data from water distribution systems. ASCE Journal of Water Resources Planning and Management. Vol 141 (11), pp. 1-11.

Blokker, E. J. M. & Schapp, P. G. 2015. Particle accumulation rate of drinking water distribution systems determined by incoming turbidity. Procedia Engineering, 119 (CCWI), 290-298.

Jones, S., Collins, R. & Boxall, J. 2015. Do transients contribute to turbidity failures of water distribution systems? Pressure Surges 2015, . Dublin, Ireland.

Ellis, K., Mounce, S., Edwards, J., Speight, V., Jakomis, N. & Boxall, J. 2015. Interpreting and estimating the risk of iron failures. Procedia Engineering 119 (CCWI), 299-308.

S. Husband, M. Jackson & J. Boxall (2015) 'Identifying Material Accumulation Processes in Drinking Water Distribution Systems with Extended Period Epanet MSX Turbidity Simulations' Procedia Engineering Vol 119 pp 398-406 doi:10.1016/j.proeng.2015.08.901

S. Husband, J. Boxall (2015) 'Predictive water quality modelling and resilience flow conditioning to manage discolouration risk in operational trunk mains' IWA Publishing Journal of Water Supply: Research and Technology-AQUA 64.5, pp529-542 doi: 10.2166/aqua.2014.042

S. Husband, I. Douterelo, K. Fish, J. Boxall (2015) 'Biofilms and Discolouration Material Accumulation Processes in Drinking Water Distribution Systems and Modelling the Hydraulic Mobilisation' IWA Specialized Conference Biofilms in drinking water systems Arosa, Switzerland August 2015

S. Husband, M. Jackson & J. Boxall (2015) 'Identifying Material Accumulation Processes in Drinking Water Distribution Systems with Extended Period Epanet MSX Turbidity Simulations' 13th Computer Control for Water Industry Conference, CCWI, Leicester, UK September 2015

Fish, K., Collins, R., Green, N., Sharpe, R. L., Osbourn, A. & Boxall, J. (2015). Characterisation of the Physical Composition and Microbial Community Structure of Biofilms within a Model Full-Scale Drinking Water Distribution System. PLOS ONE, 10.

Douterelo, I., Boxall, J., Dienes, P., Sekar, R., Fish, K. & Biggs, C. (2014). Methodological approaches for studying the microbial ecology of drinking water distribution systems. Water Research, 65, 134-156.

Douterelo, I., Sharpe, R. L. & Boxall, J. (2014). Bacterial community dynamics during the early stages of biofilm formation in a chlorinated experimental drinking water distribution system: implications for drinking water discolouration. Journal of Applied Microbiology, 117, 286-301.

S.R. Mounce, P.S. Husband, W.R. Furnass, J.B. Boxall (2014) 'Multivariate data mining for estimating the rate of discolouration material accumulation in drinking water systems' 16th Conference on Water Distribution System Analysis, WDSA 2014, Bari, Italy (Conference presentation can be found here)

I.Douterelo, S. Husband, J.Boxall (2014) 'The bacteriological composition of biomass recovered by flushing an operational drinking water distribution system' Water Research Volume 54, 1 May 2014, Pages 100-114, http://dx.doi.org/10.1016/j.watres.2014.01.049

Furnass, W. R., Collins, R. P., Husband, P. S., Sharpe, R. L., Mounce, S. R. and Boxall, J. B. (2014)
Modelling both the continual erosion and regeneration of discolouration material in drinking water distribution systems. IWA Water Science and Technology: Water Supply, Vol 14 (1), pp. 81-90.

S.Husband, J.Mistry, J.Boxall (2013) 'Modelling and flow conditioning to manage discolouration in trunk mains' 12th International Conference on Computing and Control for the Water Industry, CCWI2013, Perugia Italy 2-5th September 2013

I.Douterelo, R.L. Sharpe, J.Boxall (2013) 'Influence of hydraulic regimes on bacterial community structure and composition in an experimental drinking water distribution system' Water Research Volume 47, Issue 2, 1 February 2013, Pages 503–516, http://dx.doi.org/10.1016/j.watres.2012.09.053

W. R. Furnass , R. P. Collins, P. S. Husband, R. L. Sharpe, S. R. Mounce and J. B. Boxall (2012) 'Modelling both the continual erosion and regeneration of discolouration material in drinking water distribution systems' IWA New Developments in IT & Water Conference, Amsterdam 4-6 November 2012

Husband,S., Boxall,J.B., (2012) 'Misleading Velocity Analysis for Water Quality Management in Transmission Mains ' EWRI 2012, Albuquerque 20/24th May

Husband,S., Xin, Y., Boxall,J.B., (2012) 'Long Term Asset Condition and Discolouration Modelling in Water Distribution Systems with Epanet MSX' EWRI 2012, Albuquerque 20/24th May

Husband, S., Jackson, M., Boxall, J. (2011) 'Trunk Main Discolouration Trials and Strategic Planning', Computing and Control for the Water Industry (CCWI) 2011, Exeter 5/7th September

Husband,S (2010) 'Discolouration in Water Distribution Systems; Understanding, Modelling and Practical Applications' Doctoral Thesis, The University of Sheffield

Husband,S., Boxall,J.B., (2011) 'Asset Deterioration and discolouration in water distribution systems' Water Research 45, 113-124 doi:10.1016/j.watres2010.08.021,

Husband,S., Williams, R., Boxall,J.B., (2010) 'Risk Managed Trunk Main Operation' Water Distribution System Analysis 2010, Tucson, Arizona, USA, 12-15 September.

Sharpe, R., Smith, C.J, Biggs, C.A. and J. B. Boxall (2010). Pilot scale laboratory investigations into the impact of steady state conditioning flow on potable water discolouration. Water Distribution System Analysis 2010, Tucson, Arizona, USA, 12-15 September.

Dienes, P., Sekar, R., Husband, S., Boxall, J.B., Osborn, A. M. and Biggs, C.A., (2010) ‘A new coupon design for simultaneous analysis of in situ microbial biofilm formation and community structure in drinking water distribution systems’ Applied Microbiology and Biotechnology 87:749-756 DOI 10.1007/s00253-010-2510-x

Husband,S., Whitehead, J., Boxall,J.B., (2010) 'The Role of Trunk Mains in Discolouration' Journal of Water Management, ICE, DOI: 10.1680/wama.900063

Husband,S., Boxall,J.B., (2010) 'Field Studies of Discolouration in Water Distribution Systems: Model Verification and Practical Implications' Journal of Environmental Engineering 136(1): 86-94 DOI: 10.1061/(ASCE)EE.1943-7870.0000115

Seth, A., Husband,S., J., Boxall,J.B., (2009) 'Rivelin Trunk Main Flow Test' Proc. 10th International Conference on Computing and Control for the Water Industry, CCWI, 1 - 3 September, Sheffield, UK

Husband,S., Whitehead, J., Boxall,J.B., (2009) 'Long Term Trunk Main Monitoring Yields Operational Dividends' 3rd Biennial Conference of the UK Network on Potable Water Treatment & Supply, Buxton, 1,2 June 2009

Husband,S., Boxall, J.B., Saul, A.J. (2008) 'Laboratory Studies Investigating the Processes Leading to Discolouration in Water Distribution Networks' Water Research 42(16): 4309-4318

Husband, P. S. and J. B. Boxall (2008). 'Water Distribution System Asset Deterioration and Impact on Water Quality - a case study' ASCE World Environmental and Water Resources Congress, May 13-16, Ahupua'a, Hawaii, USA

Vreeburg, J. H. G. and J. B. Boxall (2007). 'Discolouration in potable water distribution systems: A review.' Water Research 41: 519-529.

Husband,S., Boxall,J.B., (2007) ‘Repeat DMA Flushing Operations: discolouration comparison, modelling and management’ Proc. EPSRC Develpments in Water Treatment & Supply, 4-5 July 2007, Bath, UK

Boxall,J.B. and Prince, R.A., (2006) ‘Modelling Discolouration in a Melbourne (Australia) Potable Water Distribution System’. Journal of Water Supply: Research and Technology - AQUA, IWA. 55.3, 207-219

Husband,S., Boxall,J.B., (2005) ‘Material Accumulation and Mobilisation in a Pipe Loop System’. Proc. EPSRC Develpments in Water Treatment & Supply, 5 - 6 July 2005, York, UK

Boxall,J.B., Dewis, N. (2005) 'Identification of discolouration risk through simplified modelling' Proc. ASCE, EWRI, World Water and Environmental Resources Congress, May 15-19, Anchorage, Alaska, USA

Boxall,J.B., and Saul, A.J. (2005) ‘Modelling Discolouration in Potable Water Distribution Systems’ Journal Environmental Engineering ASCE. Vol 131, No. 5, 716-725.

Boxall,J.B., Saul, A.J. and Skipworth, P.J. (2004) ‘Modelling for Hydraulic Capacity’ Journal of the American Water Works Association. Vol. 96, No. 4, pp. 161-169.

Boxall,J.B., Skipworth, P.J. and Saul, A.J. (2003)
‘Aggressive flushing for discolouration event mitigation in water distribution networks’ Water Science and Technology - Water Supply Vol. 3; Part 1/2 pp. 179- 186.

Boxall,J.B., Unwin, D.M., Husband, P.S., Saul, A.J., Dewis, N. and Gunstead, J.D. (2003) 'Water quality in distribution systems: rehabilitation and maintenance strategies’ Proc. International CCWI conference, Advances in Water Supply Management, 15 - 17 September 2003, Imperial College London, UK.

Boxall,J.B., Saul, A.J., Gunstead, J.D. and Dewis, N. (2003) ‘Regeneration of discolouration in distribution systems’ Proc. ASCE, EWRI, World Water and Environmental Resources Conference, 23-26 June 2003, Philadelphia, USA.

Seth,A., Bachmann, R.T., Boxall, J.B., Saul, A.J. and Edyvean, R. (2003) ‘Characterisation of Materials Causing Discolouration in Potable Water Systems’ Water Science and Technology, Vol 49, No 2, 27-32

Boxall,J.B., Skipworth, P.J. and Saul, A.J. (2001) 'A Novel Approach to Modelling Sediment Movement in Distribution Mains Based on Particle Characteristics'. Water Software Systems: v. 1: Theory and Applications (Water Engineering & Management). B. Ulanicki, B. Coulbeck and J. P. Rance, Research Studies Press, Hertfordshire, UK. 1: 263-273.