Conventional processes for removing ions from water by precipitation require the use of chemical agents such as sodium hydroxide (NaOH) and/or sulphuric acid (H2SO4), but their use entails high costs, risks and environmental problems. The proposed RECOPRESA solution, based on electrochemistry, controls pH levels without the need for additives and allows the recovery of salts such as phosphates and carbonates without affecting the quality of the treated water, through a low-cost and sustainable process.
This technology enables the recovery of mineral salts from water streams through an electrochemically driven precipitation process that operates without chemical additives. The system uses controlled pH modulation to trigger crystallization reactions, allowing targeted salts to form and separate from the water. The process is continuous, with water flowing through a treatment zone where precipitation occurs and then moving to a neutralization stage before discharge. An integrated aeration mechanism enhances mixing and supports the separation of solids from the liquid phase, enabling the precipitated material to settle and be collected efficiently. The recovered product may contain valuable mineral combinations suitable for reuse. This approach offers a sustainable alternative for resource recovery, reducing operational costs and environmental impact while maintaining the quality of the treated water.
Competitive advantages
Objective market
Potential applications
Intellectual property status
Granted Patent
Patent number : EP24383075
PCT application number: PCT/EP2025/078563
Where : Europe
Current development status
Working prototypes
Desired business relationship
Technology development
New technology applications
The University of Girona (UdG) by means of its Research & Technology Transfer Office (TTO) provides services to 117 research groups, 42 of which have been recognized as Consolidated Research Group of Catalonia and 4 among them have been incorporated into the TECNIO network, the top Catalonia's Government excellence research network.
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