Water reuse is a key lever for advancing water sustainability, particularly in contexts of increasing water stress and high regulatory pressure. To ensure safe reuse, it is essential to comply with the microbiological parameters required by RD 1085/2024, which establishes the quality criteria for the different uses of reclaimed water.

In this context, disinfection becomes a critical stage of the treatment process, as it must ensure the effective removal of pathogens, guarantee the microbiological stability of the water, and minimise risks to public health and the environment, all without significantly increasing energy consumption or operational complexity.

There is an opportunity to deploy in-line disinfection systems that do not rely on chlorine, do not generate by-products, and reduce operational complexity as well as the risks associated with handling chemical products. Such solutions would enable improved process sustainability, cost reduction, and simplified operation for internal plant uses.

We are looking for alternative disinfection technologies, with a medium–high TRL (≥5), capable of operating continuously on treated wastewater, without the use of chlorine or the generation of by-products. Solutions must be robust, low-maintenance, and easily integrable into existing WWTP facilities.

Non-revenue water management is a critical challenge in agricultural environments and irrigator communities, where water distribution takes place through extensive, heterogeneous networks that often lack digitalization.

The lack of visibility into actual water use makes it difficult to detect losses, inefficient use, or imbalances between the water distributed and the water consumed by crops.

This challenge fits within a broader digitalization strategy to improve profitability, justify investments, and provide greater control — especially in the field of potable water, where management is more complex and often dependent on indirect measures based on sanitation.

Non-revenue water management is a critical challenge in agricultural environments and irrigator communities, where water distribution takes place through extensive, heterogeneous networks that often lack digitalization.

The lack of visibility into actual water use makes it difficult to detect losses, inefficient use, or imbalances between the water distributed and the water consumed by crops.

This challenge fits within a broader digitalization strategy to improve profitability, justify investments, and provide greater control — especially in the field of potable water, where management is more complex and often dependent on indirect measures based on sanitation.

We are looking for solutions based on remote sensing that can measure parameters in client plantations to estimate water consumption and detect discrepancies against recorded usage.

Solutions with soil analysis capabilities using historical imagery, real-time visualization to identify sources of unaccounted or under-accounted water, and tools that allow the service to evolve toward higher-value and monetizable models for clients will be valued.

ACCIONA places sustainability and positive impact at the core of its strategy. In the water sector, there is an opportunity to promote innovative solutions that improve industrial operational efficiency and contribute to the decarbonisation of processes. Within this context, exploring biological elements capable of capturing CO₂ and other pollutants emerges as a promising pathway towards cleaner and more sustainable models.

The use of biological elements capable of capturing CO₂ and other pollutants not only contributes to emissions reduction and process decarbonisation, but also improves energy efficiency ratios, enhances product water quality, and generates a direct positive impact on the surrounding environment.

ACCIONA is launching this challenge to identify technological solutions capable of transforming waste into value-added products, such as the use of by-products to generate new materials or resources.

Solutions applicable to water cycle infrastructure that enable waste valorisation, reduce environmental footprint, and generate products with a positive economic, environmental, and social impact will be prioritised.

ACCIONA has the challenge to find new business models from data generated and, if it is able to implement solutions that collect, store, and analyse the relevant information, will grant the business of ACCIONA Agua with a corporate intelligent service and data analysis that is fast, agile, and far more efficient.

The water treatment plants have many processes from which vast amounts of data are generated and which have to be tended to in order to not only get results from solutions, but anticipate and prevent possible incidents in the treatment processes.

Business model transition in projects to offer services. Content development for ACCIONA’s cloud where the future numerical updates, cognitive intelligence, algorithms and control systems in the cloud.

The plants themselves offer a lot of information that grants knowledge of the medium and the processes. Accessing that data volume and be able to analyse it provides new tools and business lines within the data exploitation itself, and opens real possibilities to the improvement and optimization of designs.