Microalgae as versatile cellular factories for valued products

Koller, Martin; Muhr, Alexander; Braunegg, Gerhart

doi:10.1016/j.algal.2014.09.002

Cited by 509 publications

(332 citation statements)

References 112 publications

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“…Esto se estudió ampliamente en el caso de varias especies de microalgas [25]. Al respecto, se puede apreciar (Tabla 3), la influencia de la luz en la producción de este compuesto, en las diferentes etapas de crecimiento celular.…”

Section: Discusionesunclassified

Producción de pigmentos por Aphanothece microscópica Nageli a partir de residuos industriales lácteos

Streit

Ramírez-Mérida

Zepka

et al. 2017

Ingeniare. Rev. chil. ing.

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RESUMENLos sistemas basados en el uso de microalgas para la obtención de bioproductos son considerados un área prometedora para aplicaciones industriales. El objetivo del trabajo fue evaluar la producción de ficobiliproteínas y clorofila-a cuando Aphanothece microscopica Nägeli es cultivada en sistemas autotróficos y heterotróficos. Para ello, se desarrollaron sistemas de cultivos heterotróficos (en ausencia de luz) y autotróficos (2 klux de intensidad luminosa) en biorreactores a pH 7,6, 20 ºC, 1 vvm de aireación, empleando como medios de cultivo un efluente de industria láctea con relación C/N 20 y N/P 10, y BG11. Inóculo inicial 200 mg/L. Se efectuó el monitoreo de concentraciones de clorofila-a y ficobiliproteinas en fase logarítmica y estacionaria. Se observaron las mayores concentraciones de pigmento en la fase logarítmica: mayores concentraciones de clorofila-a en cultivos autotróficos y predominio de aloficocianina y ficoeritrina en cultivos heterotróficos. Los resultados mostraron el efecto de las variables en estudio para la producción de pigmentos, en la fase de crecimiento logarítmico, lo que indica la posibilidad de producir en sistemas heterotróficos de Aphanothece microscopica Nägeli, aproximadamente 3.185 ton/ año de biomasa, para 3.127 kg/año clorofila, 232.825 kg/año ficocianina, 47.775 kg/año aloficocianina y 7.008 kg/año ficoeritrina, cuando se utiliza efluente de industria láctea como medio de cultivo.Palabras clave: Biorrefinería, cianobacterias, clorofila, efluentes lácteos, ficobiliproteína. ABSTRACTThe systems that use microalgae to obtain bioproducts are considered a promising area for industrial applications. The objective of this work was to evaluate the production of phycobiliproteins and chlorophyll-a by Aphanothece microscopica Nägeli, when it is cultivated in autotrophic and heterotrophic systems. Thus, the cultures were grown in heterotrophic (absence of light) and autotrophic (2 klux of light intensity) system, in bioreactors at pH 7.6, 20 ºC, 1 vvm aeration, using a dairy industry effluent, with C/N 20 and N/P 10, and BG11 as

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Section: Discusionesunclassified

Producción de pigmentos por Aphanothece microscópica Nageli a partir de residuos industriales lácteos

Streit

Ramírez-Mérida

Zepka

et al. 2017

Ingeniare. Rev. chil. ing.

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“…Collecting empirical data on these parameters is necessary for modeling, defining optimum conditions, and understanding production under various growth conditions. The design and operational factors that influence these parameters include depth of culture, mixing rate (cell light/dark cycling frequency), dilution rate, nutrients, temperature, salinity, and distance of light source from the culture surface in the case of artificially lighted systems 10,27,29,30,[38][39][40][41][42] . Numerical models, such as those developed by Benson et al 7,37,43 and Lohrey and Kochergin 16 are needed to simulate and optimize microalgal production in sugar-mill wastewaters.…”

Section: Introductionmentioning

confidence: 99%

“…Such conditions, however, have not been met in any of the existing facilities around the world 2,9 . Strategies suggested for reducing production costs of biofuels, such as integrating biodiesel as co-product of a bio-refinery 10 , integrating production of polyhydroxybutyrate (PHB) or other biodegradable plastics with sugar-mill operations 11 , use of bagasse and other cellulosic trash in sugar mills for second generation biofuels 12 , and production of biocompatible / biodegradable green plastics (polyhydroxyalkanoates PHAs) from the biodiesel byproduct glycerol 13 , may be utilized with algae cultivation as well, but these have yet to be explored.…”

Section: Introductionmentioning

confidence: 99%

Growth Kinetics, Light Dynamics, and Lipid Production in Microalgae from Sugar-Mill Ponds

Benson¹,

Meyer²,

Bajpai³

et al. 2016

Chem.Biochem.Eng.Q.

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Sugar-mill wastewaters have potential to support microalgal biomass production for use as a biofuel feedstock (lipid source). Growth kinetics, light dynamics, and lipid production in multispecies-microalgae cultures collected from a sugar-mill pond are reported in this paper. Lipid content of the microalgae collected from the pond water was 14.5 % (w/w). Culturing the same microalgae in a photobioreactor on the pond wastewater supplemented with Gillard's F/2 and CO 2 , and irradiated with 151 to 337 μmol s -1 m -2 artificial light produced cells with lipid contents of 11 % (w/w) at 25 °C, 35 % (w/w) at 31 °C, and 28.6 % (w/w) at 33 °C. The maximum specific growth rates (µ max ) at 25 °C, 31 °C, and 33 °C were 0.64 d -1 , 2.5 d, and 2.7 d -1 , respectively. Under these conditions, cell densities as high as 1020 g cell dry mass (CDM) m -3 were recorded. Total scalar irradiance attenuation coefficient (k 0 ) was 0.275 m -1 in clear water and 30.5 m -1 in the dense culture. The attenuation coefficient of irradiance due to biomass (k B ) was found to be a linear function of cell concentration in this work.

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“…Human nutrition, animal feeding, biofuel production, and sustainable agriculture -these are the branches of industry that are interested in microalgae biomass 1,2 . The literature on the subject presents various studies on the productivity of different microalgal culture systems [3][4][5][6][7] .…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Growth Yield of Spirulina maxima in Photobioreactors

Saeid

Chojnacka

2016

Chem.Biochem.Eng.Q.

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The paper deals with the evaluation of the parameters for the cultivation of Spirulina maxima in two reactors (large-laboratory scale (LL) and semi-technical scale (ST)), whose illuminated areas in respect of the illuminated volume are different, and with the operating costs. We evaluated the growth yield coefficients for Spirulina maxima cultures. In the LL, the following factors were identified: Y O 2 /X -65.5; Y X/CO 2 -0.0806; Y X/P 2 O 5 -0.0082, while in the ST: Y O 2 /X -583; Y X/CO 2 -0.017; Y X/P 2 O 5 -0.0023. Although the reactor in the ST was equipped with many devices that should have improved the efficiency of cultivation, the obtained result was lower compared to the culture conducted in the LL. It was proved that it was possible to perform the cultivation of Spirulina maxima under temperate climate conditions in simply constructed, low cost reactors.

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Microalgae as versatile cellular factories for valued products

Cited by 509 publications

References 112 publications

Producción de pigmentos por Aphanothece microscópica Nageli a partir de residuos industriales lácteos

Producción de pigmentos por Aphanothece microscópica Nageli a partir de residuos industriales lácteos

Growth Kinetics, Light Dynamics, and Lipid Production in Microalgae from Sugar-Mill Ponds

Evaluation of Growth Yield of Spirulina maxima in Photobioreactors

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