Thermodynamics of synthesis and separation performance of Interfacially polymerized “loose” reverse osmosis membrane: Benchmarking for greywater treatment

Lanjewar, Shubham; Mukherjee, Anupam; Khandewal, Priyesh; Ghosh, Asim Kumar; Mullick, Aditi; Moulik, Siddhartha; Roy, Anirban

doi:10.1016/j.cej.2020.127929

Cited by 13 publications

(4 citation statements)

References 32 publications

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“…However, CAPEX for RO and NF continues to decrease with increasing installed capacity, , which has not been taken into consideration in these estimates. On the other hand, we are approaching the thermodynamic limit of separation , with costs for membranes reaching an asymptote …”

Section: Unit Processes and Treatment Train Cost Estimatesmentioning

confidence: 99%

“…However, CAPEX for RO and NF continues to decrease with increasing installed capacity, 225,226 which has not been taken into consideration in these estimates. On the other hand, we are approaching the thermodynamic limit of separation 227,228 with costs for membranes reaching an asymptote. 229 ■ ENERGY AND OTHER ENVIRONMENTAL CONSIDERATIONS Energy considerations are paramount to potable reuse, given the significant increase in the energy required per m 3 of treated water.…”

Section: ■ Introductionmentioning

confidence: 98%

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Direct Potable Reuse: Are We Ready? A Review of Technological, Economic, and Environmental Considerations

Keller

Jassby

2021

ACS EST Eng.

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Meeting future water demand will require serious consideration of direct potable reuse (DPR) for many water agencies. There has been tremendous progress in the technologies needed to address the concerns that conventional and novel water contaminants pose. Yet, to date, only a few relatively small DPR operations have been installed. As we get closer to the point where regulations are finalized and serious investments are planned, there is a need to ask: Are we ready? In this Review, we explore the technological, economic, and environmental considerations associated with DPR. In particular, we focus on the status of technologies for addressing the most challenging water pollutants, the cost estimates for DPR, and the energy demand and associated implications of DPR. We find that, although the technologies are nearly ready for DPR, the most critical issue will be real-time monitoring of a number of molecules that pose distinct challenges to advanced treatment trains. In addition, there is a need to consider emergency planning, both in terms of emergency buffer reservoir(s) and planning for situations in which the treated water does not meet specifications. Since any advanced treatment train will result in a significant increase in embedded energy, it will be particularly important to plan for renewable energy to minimize environmental impacts.

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Section: Unit Processes and Treatment Train Cost Estimatesmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 98%

Direct Potable Reuse: Are We Ready? A Review of Technological, Economic, and Environmental Considerations

Keller

Jassby

2021

ACS EST Eng.

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“…However, due to the difference in thermodynamic properties between the modifier and the membrane matrix material during the blending process, microscopic phase separation is inevitable along with the membrane formation, which may lead to a poor membrane macroscopic properties. 24 In recent years, various novel blending substances have been used to modify hollow fiber membranes for the preparation of high-performance HFC RO membranes. PANI (polyaniline) nanofibers with an extremely high dispersion property were obtained by the IP technique and dispersed in a PSF spinning dope.…”

mentioning

confidence: 99%

“…In addition, it should be pointed out that compared with other synthetic polymeric modifiers, the use of cellulose can reduce the consumption of fossil raw materials and promote carbon peaks and carbon neutralization. Due to the insoluble and refractory nature of natural cellulose, previous research has mainly focused on how to dissolve natural cellulose through chemical modification, such as the synthesis of CA and carboxymethyl cellulose (CMC), 24 or searched for good solvents, such as N -methylmorpholine- N -oxide (NMMO). With the development of cellulose processing technology, micro-nano cellulose powder or cellulose nanofiber can be directly obtained by the physical microfluidizer or ball milling methods.…”

mentioning

confidence: 99%

Enhanced water permeability of hollow fiber composite reverse osmosis membrane using porous α-cellulose/polysulfone hollow fiber membrane as the substrate

Li,

Fan,

et al. 2023

Textile Research Journal

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The hollow fiber composite (HFC) reverse osmosis (RO) membrane with a special self-supporting structure has attracted a great deal of attention in the fields of separation and purification. However, low permeability is an urgent problem restricting its wide application. A porous polysulfone (PSF) hollow fiber support membrane was fabricated through the dry–wet spinning technique and hydrophilic α-cellulose © powder was incorporated in the PSF membrane matrix to improve the membrane’s water permeability. The HFC RO membrane was prepared via the interfacial polymerization process on the inner surface of the C/PSF support membrane. The membrane morphology and surface hydrophilicity were evaluated through scanning electron microscopy observation and dynamic water contact angle (WCA) measurement. The effects of α-cellulose incorporation on the separation performance of PSF hollow fiber membranes and HFC RO membranes were investigated. The results showed that the surface hydrophilicity and water permeability of the PSF membrane were significantly improved after the introduction of α-cellulose. The WCA of the modified PSF support membrane decreased from 84.6° for the neat PSF membrane to 70.25°, and the pure water flux can reach a maximum value of 102.1 L/(m2 · h) (0.1 Mpa), which was 1.3 times that of the pristine membrane. The HFC RO membrane using the hydrophilic modified PSF membrane as the substrate exhibited an enhanced water flux of 15.6 L/(m2 · h) and, meanwhile, the membrane salt rejection remained above 97.6% (1.0 wt% NaCl aqueous solution, 0.7 Mpa). The HFC RO membrane showed extremely high rejection rates (99%) for different dyes (congo red and methylene blue). No obvious performance deterioration was observed for the HFC RO membrane during continuous vacuum membrane distillation (VMD) experiments for 60 h.

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A Zero Liquid Discharge Strategy with MSF Coupled with Crystallizer

Pala

Moulik

Ghosh

et al. 2022

Sustainable Water Treatment

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Thermodynamics of synthesis and separation performance of Interfacially polymerized “loose” reverse osmosis membrane: Benchmarking for greywater treatment

Cited by 13 publications

References 32 publications

Direct Potable Reuse: Are We Ready? A Review of Technological, Economic, and Environmental Considerations

Direct Potable Reuse: Are We Ready? A Review of Technological, Economic, and Environmental Considerations

Enhanced water permeability of hollow fiber composite reverse osmosis membrane using porous α-cellulose/polysulfone hollow fiber membrane as the substrate

A Zero Liquid Discharge Strategy with MSF Coupled with Crystallizer

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