Reimagining wastewater as a valuable resource

At the core of the ULTIMATE initiative lies a definitive vision: to revolutionize the management of water resources across Europe and promote the perspective that wastewater can be viewed as a precious asset. The primary objectives include minimizing environmental pollution from wastewater while simultaneously boosting savings and revenue for sectors such as petrochemicals, pharmaceuticals, distilleries, and food processing. This approach is vital for establishing a genuine circular economy, thereby decreasing the necessity for raw resource extraction. Gerard van den Berg, the innovation and valorisation manager at the KWR Water Research Institute and the project coordinator, emphasizes, “Our primary aim is to reuse and recover water, energy, and valuable materials derived from wastewater, including nutrients for agricultural purposes.”

The project team illustrated its tangible effects through nine prominent industrial case studies across Europe and beyond. These pilot projects led to the creation of innovative methods to diminish groundwater consumption, purify wastewater, and utilize it as a source of bioenergy and essential nutrients. “We chose these cases based on their investment potential for full-scale applications,” van den Berg notes. At a whisky distillery in the UK, the team demonstrated a process that enables the recycling of water along with the recovery of energy and raw materials.

Throughout the initiative, over 20 technologies were developed and tested. Among these, the Electrostimulated Anaerobic Reactor (ELSAR™) stands out as a bioelectrical innovation that integrates anaerobic digestion with wastewater treatment. Tested at the Mahou San Miguel brewery in Spain, ELSAR™ presents a viable method for treating wastewater with high organic content, thereby mitigating its environmental impact. Additionally, the SubCritical Water Extraction (SCWE) process was designed to recover valuable compounds, such as antioxidants, from wastewater. This technology was showcased at food processing facilities in Greece and Israel, highlighting the dual economic and environmental advantages of utilizing wastewater.

Collaboration and innovation were central to the ULTIMATE project, which united a variety of stakeholders, including industrial partners, water utilities, policymakers, and the public. Van den Berg considers this collaborative model crucial for success: “ULTIMATE created living labs, communities of practice, and co-creation methods throughout the project.” By leveraging these platforms, the initiative ensured a collaborative approach at every stage, from identifying challenges to developing and implementing solutions.

One distinctive tool employed by ULTIMATE was the “immersive narrative experience,” aimed at engaging local communities in the project’s study locations. This method of communication was designed to “stimulate the needs and interests of citizens,” illustrating the project’s relevance not just to industry experts but also to local populations. Such inclusive methods have fostered greater understanding and acceptance of water-smart industrial symbiosis (WSIS) as a sustainable, long-lasting solution for industries and municipalities alike. The project is also closely aligned with policymakers, van den Berg explains, “to incorporate the latest insights and experiences into new policy and guidance documents.”

A framework for the future has been established by ULTIMATE, paving the way for the broader implementation of WSIS technologies and models. A key resource for sharing the project’s findings is the Water Europe Marketplace and Technology Evidence Base, a digital platform that aggregates data from ULTIMATE and other circular economy initiatives, offering resources, case studies, and technological solutions for forthcoming projects.

The long-lasting impacts of ULTIMATE extend well beyond its operational phase. Collaborations formed during the project have already initiated new endeavors such as BOOST-IN and CIRSEAU, which aim to hasten Europe’s shift toward a circular economy. As van den Berg points out, “Several commercial partners have begun to commercialize products developed within ULTIMATE, including ELSAR™ and the SCWE process.” By fostering connections between water utilities and industries, ULTIMATE exemplifies how symbiotic relationships can promote sustainability, decrease resource consumption, and bolster Europe’s resilience to environmental challenges.