The Community of Madrid is promoting a pioneering project focused on wastewater from the dairy industrywith the aim of transforming a complex and costly waste product into useful resources for the city and industry. This initiative aligns with the European circular economy strategies and seeks to demonstrate that dairy effluents can cease to be a problem and become a source of value.
The program, called WAVE and coordinated by Madrid Institute for Advanced Studies IMDEA Energy, aims to develop an integrated process capable of transforming that wastewater into water suitable for urban irrigation and into new generation bioplasticsThis is a technological approach that combines biotechnology, materials science, and sustainable water management in a single conversion chain.
From difficult-to-treat waste to usable resource
Plants The production of milk, cheeses and other dairy products generates large volumes of liquid waste. These effluents, with their high organic load and need for specific treatments, represent a significant economic cost for companies and add pressure to wastewater treatment plants if not managed properly. Faced with this situation, WAVE proposes turning the problem on its head and exploring how to transform these waste streams into something useful.
The objective is to obtain treated water with low salinity and sufficient quality for irrigating urban green areasThis reduces dependence on conventional freshwater. In this way, the aim is to alleviate pressure on water reserves, a particularly sensitive issue in regions with recurring droughts and growing demand for water for urban and agricultural uses.
At the same time, the project focuses on the production of bioplastic materials with industrial value This involves extracting value from the organic components present in wastewater. The aim is to demonstrate that it is possible to almost completely revalue the waste stream, aligning it with the principles of the circular economy and minimizing the generation of final waste.
For the regional administration, these types of advanced solutions fit with the strategy of to promote more efficient water resource management and to foster innovation in traditional industrial sectors such as dairy. If the model shows good results, it could serve as a reference for other European communities and countries with similar problems.
Biotechnology and materials science in a single process
The core of the WAVE project is based on microbial technologies capable of utilizing short-chain fatty acids present in the wastewater of the dairy industry. These compounds, which in a conventional system are considered part of the pollutant load, become here raw material for a custom-designed biotechnological process.
Certain yeasts use those fatty acids as a substrate to produce proteinswhich are subsequently used as a basis in the manufacture of bioplastics. This approach links microbial biology with materials science, so that the same waste stream gives rise to both purified water and new materials with potential applications in various industrial sectors.
Biological treatment is combined with purification stages aimed at achieving Water with low salinity and parameters suitable for irrigationThe idea is that this resource can be used for the maintenance of parks, public gardens and other green areas, thus helping to reduce the consumption of drinking water for these uses.
This chain of processes transforms what was once an expense into a integrated value chainwhere each phase generates a usable product. From a technological point of view, it represents a step forward compared to classic wastewater treatment schemes, which focus solely on minimizing the impact of the final effluent.
Furthermore, the focus on bioplastics derived from waste aligns with the growing demand for more sustainable alternatives to conventional plastics, in a European context marked by increasingly strict regulations on waste, packaging and emissions.
Assessment of water quality and bioplastics
One of the key points of the project is the rigorous verification of the quality of the reclaimed water and the bioplastics obtainedResearchers from IMDEA Energy and their partners will carry out detailed analyses to verify that the water meets the necessary requirements for use in urban irrigation, including physical-chemical and microbiological parameters.
In parallel, the properties of bioplastics generated from proteins produced by yeasts will be studied, evaluating aspects such as Mechanical strength, processability, and potential for use in different applicationsThe intention is to determine to what extent these types of materials can compete with plastics derived from fossil fuels.
This dual analysis will allow us to measure the industrial viability of the modelnot only from an environmental perspective, but also an economic one. If reclaimed water can be used safely and bioplastics reach a suitable quality level, the dairy industry could find an additional incentive to adopt these types of processes.
The project also includes an assessment of the degree of revaluation of waste streams of the dairy supply chain, in order to verify the extent to which the fraction of waste that ends up needing conventional treatment or being dumped is reduced. This information will be key to assessing the replicability of the technology in other contexts.
Ultimately, the success of the model will depend on achieving a reasonable balance between implementation costs, the quality of the products obtained, and environmental benefits—an aspect that the project partners will analyze in detail during the various development phases.
A European consortium with Madrid as a reference node
WAVE is an initiative with European Union financing This consortium brings together several research centers and companies from different countries, solidifying Madrid's position as a key hub for circular economy research applied to water and industrial waste. IMDEA Energy coordinates the consortium, leading the design and integration of the technologies involved.
Among the international partners are the Technical University of Denmark and the Danish company 21st BIO/ASwhich contribute knowledge in bioprocesses and the development of high-performance microorganisms. Also participating from Spain is the University of Valladolid, Whereas the KTH Royal Institute of Technology from Sweden and the International Hellenic University Greece completes the European team.
This multidisciplinary collaboration aims to accelerate the transfer of results from the laboratory to industryLeveraging combined expertise in biotechnology, water treatment, materials design, and life cycle assessment, the project structure is designed to address both technical demonstration and the evaluation of its regulatory and market fit within the European Union.
For the Community of Madrid, being part of a consortium of this kind means strengthening its position as region active in environmental innovation and sustainable resource managementAt the same time, it offers the regional and national dairy industry a showcase of potential solutions for modernizing its waste management.
As the project progresses through its research and testing phases, the focus is on verifying the extent to which this combination of technologies can deploy on a larger scale and adapt to plants of different sizes, from large-scale dairy industries to smaller facilities.
The commitment to transforming the Dairy industry wastewater used in irrigation water and bioplastics It represents a clear example of how applied science can open new avenues for reducing environmental impacts and generating added value in established sectors. If WAVE's goals are met, the model could serve as a benchmark for other agri-food chains seeking circular solutions and, at the same time, help European cities better manage both water and the waste associated with their production sectors.
