Wastewater treatment rationalisation: a new and rapid approach David Brydon Analytics Director SEAMS
What is Analytics? Data acquisition Data analysis Interpretation Applicability Capital investment planning Maintenance planning Long-term asset planning Asset reliability analysis Operational improvements Benefits Lower opex and capex Focus investment Greater efficiency Improved planning
The concept A structured method for identifying opportunities for reducing the number of WwTWs Long-term asset planning Company strategy FBP in future AMPs Increasing efficiency Reducing future capex and opex Future service delivery
Wastewater Rationalisation Rationalisation - the organization of a business according to scientific principles of management in order to increase efficiency ca. 9,000 WwTW in the UK Wide range of sizes Wide range of ages & conditions Much sewage volume is treated by a small percentage of the WwTWs
Opex Efficiency Benefits of rationalisation Increase strategic efficiency Smaller asset base Enhance long-term planning Integrate inf & non-inf planning Leaner organisation More responsive Increase operational efficiency Lower opex Power Chemicals Sludge management More responsive Time Time
Identifying the opportunities Identifying opportunities can be laborious Difficult to collate all the material needed Easier to miss good opportunities Analytics can collate and analyse much of this in one tool
Past problems with rationalisation Potentially large scope for WwTW rationalisation but: Many permutations and combinations for consolidation Differing priorities in different parts of a water company Project planning problems It can be difficult to derive big picture decisions Solutions often driven by issues at single sites Often insufficient time to close several works and deliver AMP outputs
Motivation for developing the tool What are the benefits of WwTW rationalisation? Smaller asset base Potential CAPEX and OPEX savings How do we identify WwTW transfer options? Can any of these decisions be automated? are there factors common to all WwTW transfer projects? How can we improve the use of existing data and knowledge when making rationalisation decisions
The rationalisation tool Currently a spreadsheet Addition to SEAMS existing software
The rationalisation tool - data Capex & opex Locations & topography Pumping station locations Flow Load Performance NBV data PE data Condition grade data Land value
How it works The tool can work on a regional basis: Analysing closure transfer options for every WwTW in a region It can also work on individual sites or clusters of WwTW The first step is geographical
The first steps Capacity and performance analysis Option generation
Cluster analysis Cost estimates for new sewers, pumping stations, inc. opex Flows could be transferred via nearby sewers There may be other sites further away that could economically be transferred A new site could be built here.
How the model works Close all sites and transfer to receiving site Leave some sites open and transfer the others A pumping station here may be viable For each cluster of 5 works: 15 transfer options are considered 55 pumping options are evaluated It may be more economical to transfer flows via the red route rather than each WwTW individually
The Outputs Option analysis Capex and opex savings Pumping station proximity Capex & opex required for closures WwTW performance The outputs Financial analysis of capex and opex Ranked list of opportunities Annual Annual Direct Opex Annual Indir. Total Q & X P Stn Build Pipe Build Pumping Site Capex Saving Opex Saving Saving Capex Capex opex PE closed 3 4 5 6 7 8 9 10 20320000 104000 15000 6705000 1587000 1251000 51850 39952 20320000 88000 11000 6373000 633000 2008000 19410 34495 20320000 104000 15000 6346000 1282000 1690000 29770 39952 28732000 261000 31000 5730000 2251000 2275000 71760 103816 6646000 8000 1000 4107000 637000 334000 570 515 4325000 8000 1000 3466000 429000 325000 590 484 4415000 2000 1000 3339000 625000 346000 0 399 20320000 88000 11000 3145000 1180000 1181000 41930 34495 4505000 7000 1000 2947000 418000 310000 70 423 4372000 2000 1000 2776000 419000 310000 100 209 3511000 1000 1000 2527000 417000 421000 0 65 4325000 5000 1000 2425000 427000 308000 510 484 4131000 43000 6000 2395000 632000 998000 19390 17684 4664000 15000 2000 2326000 644000 297000 660 2015 3611000 1000 1000 2294000 422000 859000 280 75 2571000 1000 1000 2282000 209000 47000 10 16 2571000-1000 1000 2211000 209000 47000 10 16 3114000 3000 1000 2190000 434000 385000 630 557 4664000 16000 2000 2109000 673000 463000 1840 2015 2571000 1000 1000 1933000 209000 394000 30 16 3193000 11000 4000 1931000 629000 502000 0 927 3114000 5000 1000 1884000 648000 451000 320 1293 2824000 10000 1000 1770000 446000 463000 1060 663 4200000 6000 1000 1739000 500000 965000 3890 827 4096000 32000 1000 1642000 733000 600000 3910 1360 2151000 5000 1000 1547000 210000 52000 50 251 2594000 13000 2000 1529000 417000 279000 0 592 2769000 4000 2000 1526000 460000 678000 0 881 2594000 9000 2000 1501000 433000 278000 10 592 2238000 3000 1000 1458000 211000 365000 130 121 2231000 4000 1000 1443000 214000 173000 250 117 1781000 1000 1000 1383000 209000 85000 10 34 4857000 62000 5000 1342000 775000 1074000 3530 8113
The benefits of using the tool Benefits It greatly reduces the time needed to identify opportunities It collates the analysis into a single tool Regional rationalisation strategies can be developed quickly Long-term WwTW plans integrated with sewer catchment planning Long-term investment plans can be developed and refined Prioritisation of future investment to give long-term operational benefits A B The objectives Smaller asset base A leaner, more efficient organisation Lower operating costs A structured systematic way of moving from A to B
Aligning with business planning Business Requirements What should the strategy be for the future of our assets? Strategic Long term investment planning 25yr+ view of the assets How much do we need to spend this year and what are our service targets? Tactical Set budget and service targets Annual view of the assets What is our operations & maintenance schedule for today and tomorrow? Operational Operations and Maintenance Daily view of the assets
OPERATIONAL Business Requirements TACTICAL STRATEGIC Analytics Matrix Analytics Techniques DESCRIPTIVE PREDICTIVE PRESCRIPTIVE What happened to our assets in the last 10yrs? What will happen to our assets in the next 25yrs? What future investments do we need to make on our assets? Long term data collection Trend analysis on historic data Understand past performance Scorecards Data warehousing Data mining Forecasting the future Probability of failure Asset deterioration Statistical analysis software Long term investment scenarios Whole life cost modelling Optimisation and simulation Uncertainty and sensitivity Decision support tools What happened to our assets in the last year? What will happen to our assets in the next year? What assets do we need to replace or maintain this year? Annual data collection & refresh Review seasonal trends Identify localised issues Dashboards Annual business reporting Detailed data mining Forecast annual performance Account for localised factors Engineering validation GIS tools and techniques Annual investment scenarios Set annual budgets Set annual performance targets Candidate assets for investment Decision support tools What is happening to our assets today? What will happen to our assets tomorrow? What assets do we need to inspect or maintain tomorrow? Daily data collection Real time monitoring of assets Early warning of faults Rapid response to asset failure SCADA and monitoring tools Real time data analysis Predict highest risk assets Condition and criticality scores Process engineering Integration of analytics to SCADA Daily schedules of work Improve operational efficiency Optimise proactive Investment Prioritise reactive Investment Job optimisation schedulers 18
Summary SEAMS have a tool that can greatly speed up identification of rationalisation opportunities Analytics provides a rigorous background for region-wide analysis Rationalisation has substantial benefits: Long-term asset management Long-term investment planning Organisational and operational efficiency Lower opex and capex in the long-term Integration with other investment plans The rationalisation tool can help to define long-term wastewater asset management and investment plans with the aim of improving efficiency and reducing costs.
Thank you. Any questions?