Industrial Symbiosis: A Feasible Solution to Sustainable Resource Management in the Water Sector?

Scale of opportunity

This project has provided valuable insight into the potential scale of opportunity of adopting an industrial symbiosis approach in terms of reducing costs and delivering better value within the water sector. The project also highlighted some of the barriers and costs which need to be considered in the pathway for moving from business-as-usual material practices to an industrial symbiosis approach within United Utilities and the water sector more broadly.

A key project outcome revealed the dependency on correct processes, procedures and business culture to fully embed an industrial symbiosis approach to bring about long-lasting, tangible change.

Potential for cost and carbon savings

The project team successfully trialed the proposed approach and methodology using 13 months of available data within capital delivery. The trial showcased the potential for embedding industrial symbiosis, including cost and carbon saving estimates for individual live projects. By collaborating with their supply chain partners United Utilities were able to adopt quickly on one project realizing approximately $67,000 (£55,000) financial efficiency.

It further showed the opportunity to yield a financial saving of $17 million (£14million)­ - equivalent to 1.92% of United Utilities' overall Asset Management Period 7 (AMP 7) capital delivery budget[1] - and carbon emission savings of 100tCO₂e that could contribute towards United Utilities' net zero reporting and Science Based Targets initiative commitments to reduce carbon emissions.

Of course, a number of barriers were identified to realizing this full potential, for example regulatory, procurement procedures and availability of data. The project reported on each of these, along with potential mitigations that needed to be developed by the water sector and key stakeholders to address them.

United Utilities discussed outputs with Severn Trent Water and Dwr Cymru/Welsh Water, as well as the material-sharing opportunities with the Environment Agency's Flood and Coastal Erosion Risk Management projects in northwest England. Their feedback was considered in developing an implementation framework for industrial symbiosis across the water sector - both at present and in preparation for AMP8, which could provide a model for replication by other water companies.

Blueprint for a more sustainable approach

Industrial symbiosis offers an exciting opportunity to accelerate towards a truly circular economy. This project has successfully built new capacity and enabled better collaboration across the sector. It also demonstrated a realistic route to applying an industrial symbiosis approach for construction materials on capital delivery programs, showcasing opportunities to expand beyond construction materials to encompass nutrient and mineral resource sharing in water companies. The recommendations outlined a plan to expand industrial symbiosis as we look towards AMP8 and as technology advancements to recover value from bioresources mature.

Pilot projects like this are integral to demonstrating the viability of embedding a symbiotic approach, and can act as a sectoral blueprint to enhance resilience and deliver better value to society and the environment through a more sustainable approach to resource management.