Optimization of patterned polysulfone membranes for microalgae harvesting

Zhao, Zhenyu; Ilyas, Ayesha; Muylaert, Koenraad; Vankelecom, Ivo F.J.

doi:10.1016/j.biortech.2020.123367

Cited by 32 publications

(40 citation statements)

References 29 publications

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“…patterned membranes) offers an emerging hydrodynamic method to mitigate fouling as a simple and low-cost approach without chemical treatment. Besides, the patterned membranes have a higher surface area offering a higher flux [9][10][11][12]. The membrane patterns, as turbulence promotors, were generally used in cross flow filtration to optimize hydrodynamics.…”

Section: Introductionmentioning

confidence: 99%

Harvesting microalgae using vibrating, negatively charged, patterned polysulfone membranes

Zhao

Liu

Ilyas

et al. 2021

Journal of Membrane Science

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Key issues for membrane technology in harvesting microalgae are to reach high fluxes and to alleviate fouling by microalgal cells and extracellular organic matter. To achieve this goal, negatively charged patterned membranes were prepared from polysulfone/sulfonated polysulfone (PSf/sPSf) blends using a spray-modified phase inversion method, and the effect of sPSf on the membrane morphology and filtration performance was investigated. The patterned membrane with highest sPSf concentration exhibited the highest clean water permeance (2420±260 L/m 2 h bar), lowest membrane intrinsic resistance (6.1 m -1 ) and highest critical flux (55 L/m 2 h) for harvesting microalgae. Membrane vibration could mitigate membrane fouling both for the patterned and flat membranes. The vibration system can easily achieve turbulent flow at frequencies higher than 7 Hz. The synergy between membrane vibration, surface pattern and charge thus resulted in a clearly membrane performance.

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Section: Introductionmentioning

confidence: 99%

Harvesting microalgae using vibrating, negatively charged, patterned polysulfone membranes

Zhao

Liu

Ilyas

et al. 2021

Journal of Membrane Science

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“…In addition to the hydrophilicity and surface charge modifications, surface patterning is considered an emerging method to alleviate fouling due to the unique hydrodynamic flow behavior near the membrane surface and the extended active area (Ilyas et al, 2020;Jung and Ahn, 2019;Marbelia et al, 2020;Zhao et al, 2020b).…”

Section: Introductionmentioning

confidence: 99%

“…Patterned membranes have been used for waste water treatment and microalgae harvesting, showing higher membrane fluxes than corresponding flat membranes (Lee et al, 2013;Zhao et al, 2020b;Zhao et al, 2021). The traditional ways for modifying the membrane surface are template-based molding, direct printing (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…The polymer solution is cast using a modified patterned knife, and non-solvent is simultaneously sprayed on the cast film to rapidly solidify the surface pattern. The membrane prepared using this modified phase inversion method showed a significantly higher clean water permeance (CWP) than when using the traditional phase inversion method (Ilyas et al, 2020;Marbelia et al, 2020;Zhao et al, 2020b). The anti-fouling property of the patterned membrane is highly related to the pattern shape (Choi et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Harvesting microalgal biomass using negatively charged polysulfone patterned membranes: Influence of pattern shapes and mechanism of fouling mitigation

et al. 2021

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“…Several innovative techniques have recently been developed to control membrane fouling in the membrane filtration system. These include changing the hydrophilicity and pore size of the membrane in tilted panel filtration system, 19 changing the wave height and distance of patterned membrane, 20 the use of a finned spacer to improve the impact of air bulbs on membrane fouling, 21 and the use of standalone forward osmosis 22 . However, these technologies are still not economically feasible due to the high capital investments and operating costs, which limit their scale up.…”

Section: Introductionmentioning

confidence: 99%

Pilot‐scale microalgae harvesting with ceramic microfiltration modules: evaluating the effect of operational parameters and membrane configuration on filtration performance and membrane fouling

Bamba

Lozano

Ouattara

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND Membrane fouling is one of the major drawbacks in microalgae harvesting that prevents the widespread application of membrane filtration. This study investigates the effects of operating parameters on the filtration performance and the fouling phenomenon of a pilot‐scale microfiltration (MF) system equipped with different ceramic membranes for Chlorella vulgaris culture harvesting. RESULTS A higher permeate flux was obtained with increasing the transmembrane pressure, resulting in lower irreversible and reversible filtration resistances. On the other hand, at a higher crossflow velocity above 4 m s−1, a high amount of extracellular organic matter (EOM) released by microalgal cells led to a higher irreversible resistance which, in turn, caused severe membrane fouling and a lower filtration flux. Furthermore, the membrane configuration and pore size have also significantly affected the permeate flux. Compared to the tubular membranes, and regardless of pore sizes, the multichannel MF membrane (pore size: 0.2 μm) exhibited a higher permeate flux that resulted in lower membrane resistances due to the lower release of EOM by microalgae cells. Moreover, the tubular membrane (pore size: 0.8 μm) showed a higher flux reduction with higher pore size because of the increase in the irreversible resistance with a high amount of EOM release. CONCLUSION The results revealed that the amount of EOM significantly associated with filtration conditions plays an important role in membrane fouling control. Considering the membrane configurations, the multichannel ceramic MF membrane (pore size: 0.2 μm) demonstrated a higher permeate flux due to its lower fouling property. © 2020 Society of Chemical Industry (SCI)

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Optimization of patterned polysulfone membranes for microalgae harvesting

Cited by 32 publications

References 29 publications

Harvesting microalgae using vibrating, negatively charged, patterned polysulfone membranes

Harvesting microalgae using vibrating, negatively charged, patterned polysulfone membranes

Harvesting microalgal biomass using negatively charged polysulfone patterned membranes: Influence of pattern shapes and mechanism of fouling mitigation

Pilot‐scale microalgae harvesting with ceramic microfiltration modules: evaluating the effect of operational parameters and membrane configuration on filtration performance and membrane fouling

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