Valorisation of precipitated silica wastewater through circular economy strategy for sodium sulphate and water recovery
Precipitated Silica production process generates as a by-product a high conductivity salt stream that is poured into natural channels after passing through treatment plants. The main salt generated in the process is sodium sulphate that must be removed, along with other components as colloidal silica, by washing, generating a big water consumption.
In this context, IQE and EURECAT have developed a reverse osmosis-based process in a small scale (2 m3/h) that solves membrane blocking problems that made unfeasible this technology up to now. This development has been carried out within the framework of the H2020 research and innovation ZeroBrine project (G.A. no 73090) by IQE and EURECAT
This project will be leaded and coordinated by IQE and the partnerships structure will be completed with EURECAT. IQE, as precipitated silica manufacturer, will lead industrial activities piloting the pre-industrial plant and validating technical and economic feasibility and related future business, while EURECAT will contribute with their expertise in membrane technologies and wastewater treatment, environmental monitoring and the technical transferability fo the technology.
The LIFE ZEROSILIBRINE project has received funding from the European Union under grant agreement nº LIFE20 ENV/ES/000522. The project runs from 01/09/2021 until 31/12/2024 and has a budget of 3,200,605 €.