Chlorella vulgaris broth harvesting via standalone forward osmosis using seawater draw solution

Nawi, Normi Izati Mat; Arifin, Siti Nor Hidayah; Hizam, Shafiq Mohd; Rampun, Erdina Lulu Atika; Bilad, Muhammad Roil; Elma, Muthia; Khan, Asim Laeeq; Wibisono, Yusuf; Jaafar, Juhana

doi:10.1016/j.biteb.2020.100394

Cited by 19 publications

(8 citation statements)

References 56 publications

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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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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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“…Alternatively, simple crossflow membrane filtration can be applied for the concentration of crude oil up to the critical concentration (a point between 1000 and 3000 ppm), in which sustained operation can be achieved under low energy input ( Figure 6 ). Subsequently, another more attractive process can be applied to achieve a higher permeate recovery, which is a two-stage approach proposed for the concentration of microalgae by combining membrane-based processes with others [ 50 , 51 ].…”

Section: Resultsmentioning

confidence: 99%

Effect of Membrane Materials and Operational Parameters on Performance and Energy Consumption of Oil/Water Emulsion Filtration

et al. 2021

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Membrane technology is one of reliable options for treatment of oil/water emulsion. It is highly attractive because of its effectiveness in separating fine oil droplets of <2 µm sizes, which is highly challenging for other processes. However, the progress for its widespread implementations is still highly restricted by membrane fouling. Most of the earlier studies have demonstrated the promise of achieving more sustained filtration via membrane material developments. This study addresses issues beyond membrane development by assessing the impact of membrane material (blend of polysulfone, PSF and polyethylene glycol, PEG), operational pressure, and crude oil concentration on the filtration performance of oil/water emulsion. The filtration data were then used to project the pumping energy for a full-scale system. Results show that fouling resistant membrane offered high oil/water emulsion permeability, which translated into a low energy consumption. The oil/water emulsion permeability was improved by three-fold from 45 ± 0 to 139 ± 1 L/(m2 h bar) for PSF/PEG-0 membrane in comparison to the most optimum one of PSF/PEG-60. It corresponded to an energy saving of up to ~66%. The pumping energy could further be reduced from 27.0 to 7.6 Wh/m3 by operation under ultra-low pressure from 0.2 to 0.05 bar. Sustainable permeability could be achieved when treating 1000 ppm oil/water emulsion, but severe membrane fouling was observed when treating emulsion containing crude oils of >3000 ppm to a point of no flux.

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“…Brackish water is one of the major problems faced in mining areas, and worsens when pollutant pollutes the freshwater resources [ 1 ]. There are several membrane processes that are promising for treatment of brackish water, namely, forward osmosis [ 2 ], reverse osmosis [ 3 ], membrane distillation [ 4 ], and pervaporation [ 5 ]. Among them, desalination by the pervaporation process is particularly attractive because it employs low pressure but still results in high water flux.…”

Section: Introductionmentioning

confidence: 99%

Development of Hybrid and Templated Silica-P123 Membranes for Brackish Water Desalination

et al. 2020

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Water scarcity is still a pressing issue in many regions. The application of membrane technology through water desalination to convert brackish to potable water is a promising technology to solve this issue. This study compared the performance of templated TEOS-P123 and ES40-P123 hybrid membranes for brackish water desalination. The membranes were prepared by the sol–gel method by employing tetraethyl orthosilicate (TEOS) for the carbon-templated silica (soft template) and ethyl silicate (ES40) for the hybrid organo-silica. Both sols were templated by adding 35 wt.% of pluronic triblock copolymer (P123) as the carbon source. The silica-templated sols were dip-coated onto alumina support (four layers) and were calcined by using the RTP (rapid thermal processing) method. The prepared membranes were tested using pervaporation set up at room temperature (~25 °C) using brackish water (0.3 and 1 wt.%) as the feed. It was found that the hybrid membrane exhibited the highest specific surface area (6.72 m2·g−1), pore size (3.67 nm), and pore volume (0.45 cm3·g−1). The hybrid ES40-P123 was twice thicker (2 μm) than TEOS-P123-templated membranes (1 μm). Lastly, the hybrid ES40-P123 displayed highest water flux of 6.2 kg·m−2·h−1. Both membranes showed excellent robustness and salt rejections of >99%.

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Chlorella vulgaris broth harvesting via standalone forward osmosis using seawater draw solution

Cited by 19 publications

References 56 publications

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

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

Effect of Membrane Materials and Operational Parameters on Performance and Energy Consumption of Oil/Water Emulsion Filtration

Development of Hybrid and Templated Silica-P123 Membranes for Brackish Water Desalination

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