“Use water more efficiently close to the user. Our mantra is: water is gold!”

REWAISE works to achieve a sustainable and carbon-free water cycle. Reducing freshwater consumption is one of its main objectives and one of the ways to achieve this is the use of wastewater and non-conventional water resources.

To this end, REWAISE has formulated a specific work package to define, design and validate innovative technological solutions for the beneficial use of non-conventional water sources, wastewater and solids streams to recover water, energy and nutrients.

This working package ensures that each technology solution reaches the appropriate TRL to be implemented in the 9 Living Labs that REWAISE will have available to analyse its technologies, test their performance, and enable their scaling up.

To get a closer look at the work ahead during the next 5 years, we met with the work package leaders, Mrs. Helena Norlander and Mrs. Therese Jephson both from VA SYD, located in Sweden.

Hi Mrs. Helena Norlander and Mrs. Therese Jephson, VA SYD has large experience in water resources management in Sweden and a very important role in this project, could you please introduce yourselves and comment the main contributions of VA SYD to REWAISE? And what is VA SYD’s main motivation for participating in the project?

Hi and thank you for asking! We, Therese Jephson and Helena Norlander are the strategic and technical project manager of REWAISE for VA SYDs part. We have a very close collaboration with our Swedish partners and most of the techniques to be developed and demonstrated depend on our valuable collaboration. For VA SYDs part the REWAISE project realize the important work to become the water smart community. The unique part of the Swedish consortium is the interest to build more resilient cities by including property owners in the process and demonstrating various new concepts to use water more efficiently close to the user. Our mantra is: water is gold!

“The unique part of the Swedish consortium is the interest to build more resilient cities by including property owners in the process and demonstrating various new concepts to use water more efficiently close to the user. Our mantra is: water is gold!”

Tapping into alternative water sources can help us reduce freshwater consumption. Which alternative water resources will REWAISE work with?
VA SYD and partners at the Living Lab Skåne will work with several techniques but will mainly demonstrate how to collect and clean rain and stormwater using storage volumes and membrane filtration by Lund University to reuse water in private properties, close to the storage. Also, we will demonstrate a prototype for urine treatment designed by our linked partner SLU Uppsala, to produce a dry fertilizer.
Brunnshög, City of Lund, where REWAISE aims to test the capacity of membrane filtration in situ.

In which Living Labs will these technologies be tested?
Living Lab Skåne at the Continental hub.

Energy recovery for the development of carbon neutral services is another activity in which REWAISE is involved. You will work on achieving a zero-carbon water cycle service and minimizing energy consumption in distribution, collection, and treatment of water.How do you plan to achieve that goal?
This is an important aspect that needs to be addressed and included as we work with the life cycle analyses of the techniques. VA SYD are working on new methods on how to assess the potential for smaller footprint and increased energy efficiency. For example, by recirculating the carbon source at the waste water treatment plant and optimising the hydrolysis-fermentation process, without methane production.

Regarding nutrient recovery from water and solids, what are the main activities to be addressed in your work package?

The main activity is the development by our linked partner SLU Uppsala of a new dry and safe fertiliser based on urine separation/dehydration toilet units. Also, Ideal Carbon Utilisation (ICU) strategies developed will be analysed by VA SYD to optimize the use of organic matter at the waste water treatment plant. By using rain water and storm water nutrients like phosphorus, nitrogen and organic matter can be used locally to sustain and develop green cities, instead of polluting waterways.

“By using rain water and storm water nutrients like phosphorus, nitrogen and organic matter can be used locally to sustain and develop green cities, instead of polluting waterways.”

Living Lab Sege Park, City of Malmö, construction

All the advances made in this work package will be used by other work packages, to what extent will you help other work packages and how will you interact with them?
As WP2 leaders, VA SYD has an important and interesting role in how to increase interaction and stimulate collaboration and sharing among the partnership. We have had two WP2 digital meetings already including over 50 people in the consortium. We look forward to continuing this interesting collaboration, and hopefully invite the partners to a study visit in Sweden in the future.

What will be the interest in these developments and which entities may be interested in them?
The developments are already of interest to many actors, as property owners, municipality decision makers and city planners to mention a few. What REWAISE does is to demonstrate these as concepts in the city of Malmö and Lund. Concepts including new technical innovations but also innovations on how to cooperate and challenge the existing structures to achieve the water smart society that we all want.