Microalgae immobilization: Current techniques and uses

Moreno-Garrido, Ignácio

doi:10.1016/j.biortech.2007.05.040

Cited by 404 publications

(224 citation statements)

References 157 publications

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“…Пассивная иммобилизация базируется на естественной способ-ности микроорганизмов закрепляться на твердых или гелеобразных носителях [16]. Это простейший способ иммобилизации клеток микроорганизмов, не вызывающий клеточного стресса и имитирую-щий процесс прикрепления клеток в природе.…”

Section: методы иммобилизацииunclassified

“…-ковалентное связывание клеток с поверхно-стью носителя с помощью "сшивающих" агентов, например, глутаральдегида; -включение клеток микроорганизмов в массу носителя, например, заключение в альгинатные гра-нулы [16].…”

Section: методы иммобилизацииunclassified

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Immobilized microalgae in biotechnology

Vasilieva

Лобакова

Lukyanov

et al. 2016

Moscow Univ. Biol.Sci. Bull.

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Рассматривается иммобилизация клеток оксигенных фототрофных микроорганиз-мов -цианобактерий и эукариотических микроводорослей -в природе и в искусствен-ных системах. В обзоре подчеркивается, что существование клеток микроорганизмов в прикрепленном состоянии, например, в составе биопленок, является широко распро-страненной в природе стратегией, обеспечивающей выживание клеток. Таким образом, искусственно иммобилизованные клетки оксигенных фототрофных микроорганизмов можно рассматривать как особую группу биомиметических материалов. Особое внимание уделено изучению влияния различных способов иммобилизации на физиологическое состояние клеток цианобактерий и микроводорослей, их устойчивость к стрессовым воз-действиям, а также продуктивность культур, находящихся в иммобилизованном состоя-нии. В обзоре проводится анализ преимуществ и недостатков современных методов им-мобилизации и используемых в настоящее время носителей. Освещаются возможности применения иммобилизованных культур оксигенных фототрофных микроорганизмов в различных областях биотехнологии, таких как получение биомассы и ценных метаболи-тов, сбор биомассы, очистка водных акваторий и сточных вод от тяжелых металлов, из-бытка биогенных элементов и органических загрязнителей.

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Section: методы иммобилизацииunclassified

Immobilized microalgae in biotechnology

Vasilieva

Лобакова

Lukyanov

et al. 2016

Moscow Univ. Biol.Sci. Bull.

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“…Cells entrapped in alginate beads were more difficult to wash away or remove by water movements, predation, sedimentation, or biofouling when exposed to natural environmental conditions and could be recovered more easily at the end of the bioassay for endpoint determination than free cells [17]. Not only toxicity measurement but also immobilized microalgal cells are frequently used for metabolite production, improvement of culture collection handling, and removal of nutrients, metals, and/or organic pollutants from aquatic media [17].…”

Section: Effects Of Immobilization On the Responses Of Microalgae To mentioning

confidence: 99%

“…Immobilization becomes more and more important in microalgal application. However, the effects of immobilization on microalgae and their responses to contaminants are inconsistent, which could result in growth inhibition, enhancement, or no differences compared to free cells [17,19]. Pane et al [42] found that the growth rate of Ca-alginate-immobilized Tetraselmis suecica cells was lower than that in free cells, but the chlorophyll content per cell was higher, possibly as a response to the shading conditions posed by immobilization.…”

Section: Effects Of Immobilization On the Responses Of Microalgae To mentioning

confidence: 99%

“…Compared to free cells, immobilization of cells within a suitable matrix provides some protection to cells against the toxicity of contaminants, and immobilized cells are therefore more suitable to be used for the removal of toxic contaminants from industrial wastewater [17]. Immobilized cells are also easier to operate and harvest than free cells in treatment processes.…”

Section: Introductionmentioning

confidence: 99%

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Combined toxicity of polycyclic aromatic hydrocarbons and heavy metals to biochemical and antioxidant responses of free and immobilized Selenastrum capricornutum

Wang¹,

Luo²,

Lin³

et al. 2013

Enviro Toxic and Chemistry

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Abstract-The aquatic environment often contains different groups of contaminants, but their combined toxicity on microalgae has seldom been reported. The present study compared the toxic effects of combined mixed polycyclic aromatic hydrocarbons (PAHs) and heavy metals on growth and antioxidant responses of free and immobilized microalga, Selenastrum capricornutum. Five PAHsphenanthrene, fluorene, fluoranthene, pyrene, and benzo[a]pyrene-and four heavy metals at different concentrations-0.05 to 0.1 mg Cd 2þ ml À1 , 0.05 to 1 mg Cu 2þ ml À1 , 0.05 to 1 mg Zn 2þ ml À1 , and 0.5 to 2.5 mg Ni 2þ ml À1 -were examined. Results showed that the chlorophyll a content of free and immobilized S. capricornutum was not affected by PAHs but was significantly inhibited by heavy metals. Conversely, the antioxidant parameters, including the content of reduced glutathione (GSH) and the activities of superoxide dismutase and peroxidase, were significantly induced by both PAHs and metals. For the combined toxic effects of PAHs and heavy metals, cell growth and antioxidant responses varied with exposure time and contaminants and differed between free and immobilized cells. The effects of cocontaminants on the GSH content in free cells were mainly synergistic but changed to antagonistic in immobilized cells. The toxic effects of cocontamination on free cells were also more obvious than those on immobilized cells. These findings suggest that immobilization offers some protection to microalgal cells against toxic contaminants causing differences in the interaction and responses to combined toxicants between free and immobilized cells. Immobilized cells might be more suitable for treating wastewater containing toxic contaminants than free cells. Environ. Toxicol. Chem. 2013;32:673-683. # 2012 SETAC

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Absorption and Adsorption of Heavy Metals by Microalgae

Kaplan

2013

Handbook of Microalgal Culture

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Heavy metals are released into waterways due to various anthropogenic activities. Their treatment is of special importance, since heavy metals are nonbiodegradable and persist in the environment posing a threat to the biota due to their toxic nature. In this chapter, the current methods that have been used to remove and/or detoxify heavy metals in aquatic environments are reviewed with specific emphasis on microalgae. A literature survey indicates microalgae have developed a wide spectrum of absorption (extracellular) and adsorption (intracellular) mechanisms for coping with heavy metal toxicity. The potential of prokaryotic and eukaryotic microalgae living cells or their dead cell biomass in comparison to currently available physicochemical processes aimed at removing toxic heavy metals is discussed. Also addressed are the mandatory requirements to bring this heavy metal removal potential to an applicable, commercial stage.

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Microalgae immobilization: Current techniques and uses

Cited by 404 publications

References 157 publications

Immobilized microalgae in biotechnology

Immobilized microalgae in biotechnology

Combined toxicity of polycyclic aromatic hydrocarbons and heavy metals to biochemical and antioxidant responses of free and immobilized Selenastrum capricornutum

Absorption and Adsorption of Heavy Metals by Microalgae

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