App helps with difficult decisions
May 11, 2022
What is the best way to replace an old wastewater treatment plant? Which early warning system is most successful in protecting against flooding? Thanks to a method developed by Eawag, experts can analyse complex decision-making problems in a simple way.
In technical jargon, the method is called MCDA, short for “Multi-Criteria Decision Analysis”. The ValueDecisions app calculates and visualises the results of the MCDA in clear graphical representations and tables. “You can see at a glance which options are best for the stakeholders and where a compromise is possible,” says the environmental social scientist and biologist. While a script with complex programming runs in the background, the interface is very user-friendly. All you have to do is upload two Excel spreadsheets.
Wastewater treatment in Paris
Graph by ValueDecisions on five different options for wastewater disposal in Paris (x-axis). How well each sub-objective is achieved is indicated with coloured blocks (A_ Environmental protection, B_ Resource use, C_ Social well-being, D_ Economic performance). Depending on the environmental attitude (preservationists or utilitarians), the options achieve the subobjectives and the overall objective to different degrees (values from 0 - 1 on the y-axis). However, the status quo, the conventional wastewater treatment plant, always performs significantly worse than a decentralised vacuum system with urine source separation and dry toilets with underground compost chambers on site.
A study in rural areas of Canton Solothurn came to a similar conclusion. In several workshops, the Eawag researchers discussed the advantages and disadvantages of decentralised wastewater infrastructures compared to a conventional wastewater treatment plant with the local population and carried out an MCDA using the new app. Here too, the dry toilets performed very well in one case, as did the other decentralised options such as small wastewater treatment plants. “And the workshop participants in one municipality were very open to the decentralised solutions,” says Lienert.
Flood warning in West Africa
“We created our app for complex decisions where there are many stakeholders and uncertainties,” says Lienert, who hopes that the practical tool will soon be used by as many experts as possible. If you would like to use ValueDecisions, you can find a user guide and an example on the corresponding website, which explains the procedure step by step.
More News and Articles
May 30, 2023
Trenchless contractor puts maintenance hole relining system through its paces
Civil and trenchless specialists M Tucker & Sons showcases its expertise through a UV lining project.
May 26, 2023
City of Toronto launches tunnel boring machine for stormwater tunnel and largest basement flooding prevention project
Today, the City of Toronto marked a major milestone for the Fairbank Silverthorn Storm Trunk Sewer System project, launching a tunnel boring machine that will work to construct a new storm sewer that will collect, store and move stormwater from …
May 24, 2023
Global Water and Wastewater Utilities Take Aim at Climate Change
New Survey of 100 Utilities Tracks Net-Zero Progress: 75% of Respondents to Reduce Greenhouse Gas Emissions by 2040
May 22, 2023
Regional San’s monumental wastewater treatment plant expansion project delivered ON schedule and UNDER budget
The EchoWater Project, one of the largest public works projects in the Sacramento region’s history, takes wastewater treatment to a whole new level
May 19, 2023
Haliotis 2: Wastewater recovery and treatment complex
In April the future, next-generation wastewater recovery and treatment complex for the Métropole Nice Côte d’Azur “Haliotis 2” was presented. Christian Estrosi, Mayor of Nice, President of the Métropole Nice Côte d’Azur and Deputy President of the Région Provence-Alpes-Côte d’Azur …
May 17, 2023
Wrapping up the challenges in SA
In December 2022, Denso Australia completed the supply of a project involving the protection of 400 lineal metres of DN250 mild steel pipeline in Bolivar, South Australia.
May 15, 2023
New South Wales university receives network upgrade using SAERTEX-LINER® MULTI Type S+
Australian Pipeline Management (APM) has successfully relined three separate pipelines running under a university in Sydney with UV cured-in-place technology from SAERTEX multiCom® GmbH.
May 12, 2023
IMPREG continues to invest in Australian and NZ market
With increasing demand of IMPREG’s unique UV pipe solution, the German company continues to invest in the Australian and New Zealand market.
May 10, 2023
Yonge Street Project Combines Trenchless Rehab and New Install Practices
In the fall 2020, the Regional Municipality of York initiated a project to rehabilitate a 127 m long concrete box culvert under Yonge Street. The Region retained Jacobs Engineering to provide design and construction support services.
May 08, 2023
Climate adaption solutions for the water sector in the German-Danish border area
More than 60 participants met in Kolding, Denmark, from March 23 to 24 for the final conference of the INTERREG-Project NEPTUN. In the frame of this project, more than 40 partners elaborated 15 specific climate adaption solutions for the water …
May 05, 2023
Primus Line® flies the flag for trenchless solutions in sensitive locations
Primus Line has illustrated the benefits of trenchless technology for pipeline rehabilitation in culturally sensitive areas during two installations for one of the world’s leading mining companies.
May 03, 2023
Optimising chemical dosing in a challenging operating climate
Rising operating costs and tightening regulations are presenting major challenges for wastewater treatment plant operators, but better optimisation of chemical dosing can drive efficiencies, says Adeel Hassan, product manager at Watson-Marlow Fluid Technology Solutions.
eawag aquatic research
Judit Group Lienert
Leader, Cluster: DA (Decision Analysis)
+41 58 765 55 11
+41 58 765 50 28