Downstream integration of microalgae harvesting and cell disruption by means of cationic surfactant-decorated Fe<sub>3</sub>O<sub>4</sub>nanoparticles

Seo, Jungyun; Praveenkumar, Ramasamy; Kim, Bohwa; Seo, Jeong-Cheol; Park, Jiyeon; Na, Jeong-Geol; Jeon, Sang Goo; Park, Seung Bin; Lee, Kyubock; Oh, You-Kwan

doi:10.1039/c6gc00904b

Cited by 97 publications

(29 citation statements)

References 52 publications

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“…Treatment with NaOH at pH = 12 resulted in 95% recovery for polypropylene/iron oxide nanoparticles, with the recovered magnetic particles retained almost the same microalgae biomass harvesting efficiency as per the newly synthesized ones [ 53 ]. An 80% reusability efficiency of cationic surfactant-decorated iron oxide nanoparticles after microalgae detachment using SDS and sonication has also been reported [ 54 ].…”

Section: Resultsmentioning

confidence: 99%

Optimization of Microalga Chlorella vulgaris Magnetic Harvesting

et al. 2021

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Harvesting of microalgae is a crucial step in microalgae-based mass production of different high value-added products. In the present work, magnetic harvesting of Chlorella vulgaris was investigated using microwave-synthesized naked magnetite (Fe3O4) particles with an average crystallite diameter of 20 nm. Optimization of the most important parameters of the magnetic harvesting process, namely pH, mass ratio (mr) of magnetite particles to biomass (g/g), and agitation speed (rpm) of the C. vulgaris biomass–Fe3O4 particles mixture, was performed using the response surface methodology (RSM) statistical tool. Harvesting efficiencies higher than 99% were obtained for pH 3.0 and mixing speed greater or equal to 350 rpm. Recovery of magnetic particles via detachment was shown to be feasible and the recovery particles could be reused at least five times with high harvesting efficiency. Consequently, the described harvesting approach of C. vulgaris cells leads to an efficient, simple, and quick process, that does not impair the quality of the harvested biomass.

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Section: Resultsmentioning

confidence: 99%

Optimization of Microalga Chlorella vulgaris Magnetic Harvesting

et al. 2021

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“…54 No toxic effect induced by the nonamphiphilic cholinium cation is likely due to its less interaction with the lipid membrane of the microalgae, 55 whereas it has been shown that the amphiphilic cations normally have greater interaction toward the cell membrane, leading to higher toxicity. 56 The literature also indicates that small cations are more aggressive than larger cations in inducing the toxicity when the anions are the same. 57 Therefore, alkali cations (Na + and Li + ) are more toxic to living cells than the ammonium cation and the bigger cholinium cation ([Cho] + ).…”

Section: Resultsmentioning

confidence: 99%

Surface-Active Ionic Liquid Cholinium Dodecylbenzenesulfonate: Self-Assembling Behavior and Interaction with Cellulase

et al. 2017

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The conventional sodium dodecylbenzenesulfonate (NaDBS) has been converted into an efficient and nontoxic anionic surface-active ionic liquid, cholinium dodecylbenzenesulfonate (Cho[DBS]). We have investigated its self-assembling behavior, interaction with the enzyme cellulase, and ecotoxicity. The surface-active properties at the air–liquid interface and the aggregation behavior of Cho[DBS] in water have been determined using tensiometry, isothermal titration calorimetry (ITC), conductometry, and dynamic light scattering (DLS). The enzyme activity was observed using dinitro salicylic acid analysis. The enhanced enzyme activity was explained through active-site exfoliation and structural constancy of cellulase in the micellar medium using the results from fluorescence, circular dichroism, DLS, and ITC. The nontoxic nature was confirmed by toxicity analysis on the freshwater microalgae Scenedesmus sp.

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“…With the increasing global energy demands and its associated impact on climate have motivated the scientific communities to provide innovative solutions for the development of green, renewable, and economically feasible biofuels. In recent years, microalgae have emerged as a sustainable feedstock for the production of biofuels and high-value carotenoids, due to their inherent abilities including high growth rate, CO 2 sequestration, and effective land utilization, as compared to terrestrial energy crops. − However, the production of biofuels and carotenoids from microalgal biomass is still not economically viable, owing to the significant fossil energy inputs required for downstream processes. , For instance, the cost of harvesting microalgal biomass is estimated to be 20–30% of the total production cost. , Moreover, intense energy inputs are required for further downstream processing of biomass involving cell disruption, product extraction and purification. , Hence, the development of an integrated process which concomitantly addresses subsequent downstream step is expected to improve the cost-effectiveness of microalgal products.…”

Section: Introductionmentioning

confidence: 99%

Smart and Reusable Biopolymer Nanocomposite for Simultaneous Microalgal Biomass Harvesting and Disruption: Integrated Downstream Processing for a Sustainable Biorefinery

Dineshkumar

Paul

Gangopadhyay

et al. 2016

ACS Sustainable Chem. Eng.

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One of the major technological challenges in developing a microalgal biorefinery is to minimize the fossil energy inputs, particularly in two important downstream unit operations, cell harvesting and disruption. Hence, this study involved synthesizing and applying biopolymer nanocomposite to achieve concomitant biomass harvesting, cell disruption, and nanocomposite recovery by exploiting its cationic, photocatalytic, and magnetic properties respectively, in an integrated and optimized process chain. Accordingly, dual-functionalized chitosan-TiO 2 conjugated particles (CTC) and trifunctionalized magnetic nanocomposites (MNCs) namely, chitosan coated core−shell structures of Fe 3 O 4 −TiO 2 , were prepared and characterized. The harvesting efficiency of >98% was achieved at the optimal dosages of chitosan, CTC and MNCs of 0.11, 0.09, and 0.07 g g −1 Chlorella minutissima biomass, respectively. TiO 2 driven photocatalysis could effectively disrupt harvested wet-biomass, when exposed to UV irradiation in the presence of either CTC or MNCs for 2 h, and when subjected to visible light with only MNCs for 3 h. Photocatalytic cell disruption helped recover 96−97% of the intracellular lutein and lipid, when compared to ultrasonication as control. Subsequently, the MNCs were separated from residual biomass by physicochemical treatment, resulting in over 98% detachment efficiency for reuse in the downstream process chain. To the best of our knowledge, this integrated green process is novel, in terms of meeting a contemporary technological challenge in downstream processing of microalgal biomass, and this research outcome may inspire the development of sustainable microalgal biorefinery for the production of lutein and biodiesel.

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Downstream integration of microalgae harvesting and cell disruption by means of cationic surfactant-decorated Fe₃O₄nanoparticles

Abstract: The functionalization of cationic surfactants on Fe3O4 nanoparticles serves two roles at the same time: microalgae harvesting and cell disruption for lipid extraction.

Cited by 97 publications

References 52 publications

Optimization of Microalga Chlorella vulgaris Magnetic Harvesting

Optimization of Microalga Chlorella vulgaris Magnetic Harvesting

Surface-Active Ionic Liquid Cholinium Dodecylbenzenesulfonate: Self-Assembling Behavior and Interaction with Cellulase

Smart and Reusable Biopolymer Nanocomposite for Simultaneous Microalgal Biomass Harvesting and Disruption: Integrated Downstream Processing for a Sustainable Biorefinery

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Downstream integration of microalgae harvesting and cell disruption by means of cationic surfactant-decorated Fe3O4nanoparticles

Abstract: The functionalization of cationic surfactants on Fe3O4 nanoparticles serves two roles at the same time: microalgae harvesting and cell disruption for lipid extraction.

Cited by 97 publications

References 52 publications

Optimization of Microalga Chlorella vulgaris Magnetic Harvesting

Optimization of Microalga Chlorella vulgaris Magnetic Harvesting

Surface-Active Ionic Liquid Cholinium Dodecylbenzenesulfonate: Self-Assembling Behavior and Interaction with Cellulase

Smart and Reusable Biopolymer Nanocomposite for Simultaneous Microalgal Biomass Harvesting and Disruption: Integrated Downstream Processing for a Sustainable Biorefinery

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Downstream integration of microalgae harvesting and cell disruption by means of cationic surfactant-decorated Fe₃O₄nanoparticles