High-flux and fouling-resistant membranes for brackish water desalination

Zhao, Lin; Chang, Philip C.-Y.; Yen, Chun-Wan; Ho, W.S. Winston

doi:10.1016/j.memsci.2012.09.018

Cited by 25 publications

(19 citation statements)

References 30 publications

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“…Several pieces of research on the development of fouling-resistant LPRO membrane were also conducted by the modification of membrane surface [34][35][36][37][38]. Furthermore, Huang et al suggested the necessity of more advanced pretreatment process to prevent membrane fouling occurrence in the LPRO membrane adopted water treatment system [20].…”

Section: Introductionmentioning

confidence: 99%

Long-Term Stability of Low-Pressure Reverse Osmosis (RO) Membrane Operation—A Pilot Scale Study

Park

Kwon

2018

Water

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Reverse osmosis (RO) elements operating at a low pressure (LP) or a low energy (LE) are generally called "LPRO" or "LERO", and the nomenclature "LP" and "LE" are convertible due to the interrelated features of the pressure and the energy in the RO process. Not only can LPRO be operated at lower pressures, which enables energy saving, but also at the standard operating pressure with an enhanced permeate flux. In this study, the feasibility of the LPRO element was evaluated in the face of high fouling potential feed water. The commercially available standard RO and LPRO were chosen, and the membrane properties including the fouling susceptibility and the surface characteristics were thoroughly evaluated. The variations of various performance parameters were monitored during an 872 h operation in a pilot system, which was operated in a constant flux mode. Then, the used membranes were analyzed to further verify the fouling load localization and the fouling intensities. The average flux variation of the individual RO elements in a vessel and the economic feasibility of LPRO were also evaluated through a simulation study using an RO system design software. This study showed that the localization of fouling load within a pressure vessel of an LPRO system caused about 20% higher flux decline and almost 2-times higher salt passage than those of a standard RO membrane system. Furthermore, the simulation study predicted that average operating pressure difference ratio (%) between two RO membranes decreased from 24.4% to 17.8% and a substantial quantity of LPRO elements (83.3%) must be replaced to meet the designated water criteria only after 2 years' operation.

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Section: Introductionmentioning

confidence: 99%

Long-Term Stability of Low-Pressure Reverse Osmosis (RO) Membrane Operation—A Pilot Scale Study

Park

Kwon

2018

Water

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“…Covalent bonding of hydrophilic groups is another attempt to improve fouling resistant performance [16][17][18][19]. Addition of monofunctional structure (o-Aminobenzoic acid-triethylamine salt) into the ingredient of interfacial polymerization, then coating of cross-linked PEG can improve the flux and antifouling performance of membranes according to Ho's work [20].…”

Section: Introductionmentioning

confidence: 99%

Preparation of thin-film composite nanofiltration membranes with improved antifouling property and flux using 2,2′-oxybis-ethylamine

et al. 2015

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“…The bigger flux drops imply that lysozyme is easier to be adsorbed on membrane surface compared to BSA, causing heavier fouling. This is because lysozyme is positively charged and can be adsorbed on the negatively charged membrane surface via electrostatic attraction . However, we notice that the lignin‐coated membrane shows slightly better resistance to lysozyme adsorption although it carries more negative charges than the virgin membrane.…”

Section: Resultsmentioning

confidence: 83%

“…This is because lysozyme is positively charged and can be adsorbed on the negatively charged membrane surface via electrostatic attraction. 41 However, we notice that the lignin-coated membrane shows slightly better resistance to lysozyme adsorption although it carries more negative charges than the virgin membrane. The coated membrane has a smoother surface as revealed by SEM and AFM examinations, which contributes to repel protein adsorption.…”

Section: Performances Of the Lignin-coated Membranesmentioning

confidence: 76%

Depositing lignin on membrane surfaces for simultaneously upgraded reverse osmosis performances: An upscalable route

Zhang

et al. 2017

AIChE Journal

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Reverse osmosis (RO) have been widely used to produce clean water and there is a strong need to enhance their permeability at no sacrifice of their other performances, e.g., selectivity. We deposit low‐cost biopolymer, lignin, onto the surface of RO membranes by a simple filtration method. Lignin is deposited to the membrane surface via both hydrogen bonding and π‐π interaction. Lignin deposition reduces the surface roughness of the membrane and enhances its negatively charging, while the surface hydrophilicity is maintained. Surprisingly, water permeation, salt rejection, and fouling resistance of the lignin‐deposited membranes are simultaneously improved. More importantly, we demonstrate that this deposition method can be easily extended to modify commercial RO membrane modules, indicating the excellent upscalability of this method. We use the lignin‐deposited membranes to treat real effluents of dyeing and papermaking and they perform much better than the virgin, unmodified membranes. © 2017 American Institute of Chemical Engineers AIChE J, 63: 2221–2231, 2017

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High-flux and fouling-resistant membranes for brackish water desalination

Cited by 25 publications

References 30 publications

Long-Term Stability of Low-Pressure Reverse Osmosis (RO) Membrane Operation—A Pilot Scale Study

Long-Term Stability of Low-Pressure Reverse Osmosis (RO) Membrane Operation—A Pilot Scale Study

Preparation of thin-film composite nanofiltration membranes with improved antifouling property and flux using 2,2′-oxybis-ethylamine

Depositing lignin on membrane surfaces for simultaneously upgraded reverse osmosis performances: An upscalable route

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