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Hybrid Forward Osmosis–Nanofiltration for Wastewater Reuse: System Design

The design of a hybrid forward osmosis–nanofiltration (FO–NF) system for the extraction of high-quality water from wastewater is presented here. Simulations were performed based on experimental results obtained in a previous study using real wastewater as the feed solution. A sensitivity analysis, c...

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Autores principales: Giagnorio, Mattia, Ricceri, Francesco, Tagliabue, Marco, Zaninetta, Luciano, Tiraferri, Alberto
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6572449/
https://www.ncbi.nlm.nih.gov/pubmed/31064140
http://dx.doi.org/10.3390/membranes9050061
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author Giagnorio, Mattia
Ricceri, Francesco
Tagliabue, Marco
Zaninetta, Luciano
Tiraferri, Alberto
author_facet Giagnorio, Mattia
Ricceri, Francesco
Tagliabue, Marco
Zaninetta, Luciano
Tiraferri, Alberto
author_sort Giagnorio, Mattia
collection PubMed
description The design of a hybrid forward osmosis–nanofiltration (FO–NF) system for the extraction of high-quality water from wastewater is presented here. Simulations were performed based on experimental results obtained in a previous study using real wastewater as the feed solution. A sensitivity analysis, conducted to evaluate the influence of different process parameters, showed that an optimum configuration can be designed with (i) an influent draw solution osmotic pressure equal to 15 bar and (ii) a ratio of influent draw solution to feed solution flow rate equal to 1.5:1. With this configuration, the simulations suggested that the overall FO–NF system can achieve up to 85% water recovery using Na(2)SO(4) or MgCl(2) as the draw solute. The modular configuration and the size of the NF stage, accommodating approximately 7000 m(2) of active membrane area, was a function of the properties of the membranes selected to separate the draw solutes and water, while detailed simulations indicated that the size of the FO unit might be reduced by adopting a counter-current configuration. Experimental tests with samples of the relevant wastewater showed that Cl(−)- and Mg(2+)-based draw solutes would be associated with larger membrane fouling, possibly due to their interaction with the other substances present in the feed solution. However, the results suggest that fouling would not significantly decrease the performance of the designed system. This study contributes to the further evaluation and potential implementation of FO in water reuse systems.
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spelling pubmed-65724492019-06-18 Hybrid Forward Osmosis–Nanofiltration for Wastewater Reuse: System Design Giagnorio, Mattia Ricceri, Francesco Tagliabue, Marco Zaninetta, Luciano Tiraferri, Alberto Membranes (Basel) Article The design of a hybrid forward osmosis–nanofiltration (FO–NF) system for the extraction of high-quality water from wastewater is presented here. Simulations were performed based on experimental results obtained in a previous study using real wastewater as the feed solution. A sensitivity analysis, conducted to evaluate the influence of different process parameters, showed that an optimum configuration can be designed with (i) an influent draw solution osmotic pressure equal to 15 bar and (ii) a ratio of influent draw solution to feed solution flow rate equal to 1.5:1. With this configuration, the simulations suggested that the overall FO–NF system can achieve up to 85% water recovery using Na(2)SO(4) or MgCl(2) as the draw solute. The modular configuration and the size of the NF stage, accommodating approximately 7000 m(2) of active membrane area, was a function of the properties of the membranes selected to separate the draw solutes and water, while detailed simulations indicated that the size of the FO unit might be reduced by adopting a counter-current configuration. Experimental tests with samples of the relevant wastewater showed that Cl(−)- and Mg(2+)-based draw solutes would be associated with larger membrane fouling, possibly due to their interaction with the other substances present in the feed solution. However, the results suggest that fouling would not significantly decrease the performance of the designed system. This study contributes to the further evaluation and potential implementation of FO in water reuse systems. MDPI 2019-05-06 /pmc/articles/PMC6572449/ /pubmed/31064140 http://dx.doi.org/10.3390/membranes9050061 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Giagnorio, Mattia
Ricceri, Francesco
Tagliabue, Marco
Zaninetta, Luciano
Tiraferri, Alberto
Hybrid Forward Osmosis–Nanofiltration for Wastewater Reuse: System Design
title Hybrid Forward Osmosis–Nanofiltration for Wastewater Reuse: System Design
title_full Hybrid Forward Osmosis–Nanofiltration for Wastewater Reuse: System Design
title_fullStr Hybrid Forward Osmosis–Nanofiltration for Wastewater Reuse: System Design
title_full_unstemmed Hybrid Forward Osmosis–Nanofiltration for Wastewater Reuse: System Design
title_short Hybrid Forward Osmosis–Nanofiltration for Wastewater Reuse: System Design
title_sort hybrid forward osmosis–nanofiltration for wastewater reuse: system design
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6572449/
https://www.ncbi.nlm.nih.gov/pubmed/31064140
http://dx.doi.org/10.3390/membranes9050061
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