Desalination by pulsed electrodialysis reversal: Approaching fully closed-loop water systems in wood pulp mills

Alvaro Gonzalez-Vogel*, Juan J. Moltedo, Orlando J. Rojas

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

2 Sitaatiot (Scopus)
109 Lataukset (Pure)


A pulsed electrodialysis reversal (pEDR) process is proposed to desalinate spent water after particle removal, biological and chemical coagulation, which are commonly used as a sequence in Kraft pulp mills. pEDR affords closed-loop processing, reducing the need for freshwater intake while maintaining the quality of recirculating process streams. Compared with conventional electrodialysis, pEDR minimizes production losses (from 5 % to 0.6 %), extending the time for hydraulic reversal (from 15 min to at least 2 h). Simultaneously, the conductivity of the effluent is significantly reduced, from 2100 to 200 μS/cm, reaching a quality similar to the feed water. The operation cost (0.38 US$/m3) is factored in the techno-economic viability of the process water recirculation, which is also demonstrated for its scalability. Additionally, WinGEMS simulation highlights the benefits of installing a pEDR unit, positively impacting mill water under different recirculation rates. Overall, we show remarkable gains in water economy, operation (maintenance and fouling), and quality, which are critical factors in achieving resource sufficiency.

JulkaisuJournal of Environmental Management
Varhainen verkossa julkaisun päivämäärä14 elok. 2021
DOI - pysyväislinkit
TilaJulkaistu - 15 marrask. 2021
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu


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