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Title: | Evaluation of draw solutions and commercially available forward osmosis membrane modules for wastewater reclamation at pilot scale |
Author: | Corzo García, Beatriz Torre, Teresa de la Sans Mazón, Carme Ferrero, Enrique Malfeito, Jorge J. |
Keywords: | Osmosi Depuració d'aigües residuals Reutilització de l'aigua Osmosis Purification of sewage Water reuse |
Issue Date: | 17-May-2017 |
Publisher: | Elsevier B.V. |
Abstract: | An intensive evaluation of draw solutions (DS) was performed by focusing on the wastewater reuse applications of hybrid forward osmosis (FO) processes. The substances studied were potassium formate, potassium phosphate, magnesium sulphate, sodium chloride, sodium polyacrylate and polyethylene glycol, and their osmotic pressure, conductivity, pH, thermostability, sunlight exposure, toxicity, FO filtration performance and replenishment costs were determined. Additionally, commercially available FO membrane modules were evaluated at pilot scale. The results revealed that the most relevant DS properties for wastewater reuse under the studied conditions were the DS regeneration method, DS replacement price, pH adjustment and toxicity. These properties were shown to be more relevant than filtration flux when a maximum DS osmotic pressure value of 10 bar was used. This was the limit for efficient DS recovery. When the different FO membranes were compared, thin-film composite (TFC) flat-sheet membranes showed the highest flux and the highest salt rejection, and the lowest permeability and salt rejection values were presented by cellulose triacetate (CTA) hollow fibre membranes. Based on the information obtained, a TFC-FO/nanofiltration (NF) demonstration plant will be constructed next to the wastewater treatment plant (WWTP) in San Pedro del Pinatar, in the region of Murcia (Spain). This represents the world's first FO demonstration plant for municipal wastewater reclamation and its results will allow this technology to be evaluated for wastewater reuse for agricultural purposes |
Note: | Versió postprint del document publicat a: https://doi.org/10.1016/j.cej.2017.05.108 |
It is part of: | Chemical Engineering Journal, 2017, vol. 326, p. 1-8 |
URI: | https://hdl.handle.net/2445/163712 |
Related resource: | https://doi.org/10.1016/j.cej.2017.05.108 |
ISSN: | 1385-8947 |
Appears in Collections: | Articles publicats en revistes (Enginyeria Química i Química Analítica) |
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