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SWRO concentrates for more efficient wastewater reclamation

Abstract: Developing technical alternatives to increase the volume of remediated waters is a promising way to alleviate pressure on natural water basins. However, the extra energy consumed in Wastewater Treatment Plants (WWTPs), mainly powered by fossil fuels, hampers this strategy. This work focuses on promoting efficient upgrading alternatives of treated waters by recovering energy within the treatment process. The approach consists on the recovery and integration of Salinity Gradient Energy (SGE) generated from the contact between SWRO brines and reclaimed wastewaters in reverse electrodialysis modules. The analysis of opportunity of implementing integrated processes in Spanish WWTPs near SWRO desalination plants is tackled. 16 SWRO-WWTP pairs have been inventoried, 10 of them located in Jucar and Segura river basins, hot spot areas for water reclamation. A gross power density of 0.46 W/m2 (71 Wh/m3 reclaimed water) of SGE has been generated in the contact between SWRO brines and reclaimed wastewater, increased up to 0.23 kWh/m3 in the most favourable scenario. Estimates of freshwater withdrawals savings up to 434,387 m3/day within the selected installations are obtained. Decrease in water abstraction and integration of renewable source of energy in the remediation process will contribute to water sources protection and water industry decarbonisation.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Autoría: Sampedro T., Tristán C., Gómez-Coma L., Rioyo J., Sainz M., Ortiz I., Ibañez R.,

 Fuente: Desalination, 2023, 545, 116156

Editorial: Elsevier

 Fecha de publicación: 01/01/2023

Nº de páginas: 10

Tipo de publicación: Artículo de Revista

 DOI: 10.1016/j.desal.2022.116156

ISSN: 0011-9164

Proyecto español: PDC2021-120786-I00

Url de la publicación: https://doi.org/10.1016/j.desal.2022.116156