Improving mass transfer in an inclined tubular photobioreactor

Babcock, Roger W.; Wellbrock, Anke; Slenders, Peter; Radway, JoAnn C.

doi:10.1007/s10811-015-0763-6

Cited by 17 publications

(11 citation statements)

References 10 publications

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“…Table compares the k L a values obtained in this work with those reported in the literature for different configurations of PBRs. The value of k L a obtained for the PBR‐C in the biphasic system is 1.5 and 2.7 times higher than that of an airlift FP‐PBR reported by J. H. Dulce et al and a tubular PBR reported by Babcock et al . Furthermore, k L a values of PBR‐C are lower than that of different PBRs reported by N. Agathos et al,Siegel et al, and Contreras et al The superficial gas velocities used in these literatures were much higher than those in this study.…”

Section: Resultscontrasting

confidence: 63%

“…In addition, the liquid phase mass transfer coefficient of the ladder‐type Mixer C is slightly lower than that of Mixer A but significantly higher than that of Mixer B and No Mixer. Table compares the k L a values obtained in this work with those reported in the literature for different configurations of PBRs. The value of k L a obtained for the PBR‐C in the biphasic system is 1.5 and 2.7 times higher than that of an airlift FP‐PBR reported by J. H. Dulce et al and a tubular PBR reported by Babcock et al .…”

Section: Resultsmentioning

confidence: 74%

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Investigate the cross‐flow flat‐plate photobioreactor for high‐density culture of microalgae

Zhao

Tang

et al. 2018

Asia-Pacific J Chem Eng

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In order to improve the high‐density culture of microalgae, the traditional flat‐plate photobioreactors were modified with parallel baffles with different structures. The mixing characteristics of triphase flow in four types of bioreactors were investigated using the numerical simulation and experiments. The comparison shows that the results of simulations are consistent with those of experiments. The photobioreactor with ladder‐type parallel baffle could produce multiintensification functions of flow mixing, mass transfer, and bioreaction so that its integrated performances on high‐density culture are more prominent than other bioreactors. The culturing experiments were carried out in a bioreactor fed with air containing 10% CO2 at a flow rate of 10 L min−1. The results show that the growth rate of Chlorella vulgaris reaches 0.783 g L−1 d−1 with a total biomass of 7.21 g L−1 within 6 days, further achieving the efficient high‐density prolonged culture with multiperiods, which is significant for industrial applications.

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Section: Resultscontrasting

confidence: 63%

Section: Resultsmentioning

confidence: 74%

Investigate the cross‐flow flat‐plate photobioreactor for high‐density culture of microalgae

Zhao

Tang

et al. 2018

Asia-Pacific J Chem Eng

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“…Turbulent flow facilitates mixing in the normal direction (which is particularly necessary for high concentrations of cells), while laminar flow saves energy and is gentler on the cells. In tube reactors, more (sometimes much more) than 400 W/m 3 is customary (Babcock et al 2002), while in plate reactors the lowest level is 50 W/m 3 (Sierra et al 2008). Both open ponds and, even more so, enclosed bioreactors thus need auxiliary power essentially for mixing, gassing and transport.…”

Section: Hydrodynamic Parametersmentioning

confidence: 99%

11 Construction and assessment parameters of photobioreactors

Oeschger¹,

Posten²

2012

Microalgal Biotechnology: Potential and Production

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“…Sin embargo, la tasa de inyección y la transferencia eficiente del CO 2 al medio de cultivo junto con la temperatura y la intensidad de luz son los mayores factores que influyen en la asimilación fotosintética del carbono [23,24]. Al realizar cultivos solo con el CO 2 presente en el aire (0,036%v) se obtienen bajas productividades, por lo tanto la solución a este déficit es inyectar CO 2 , para obtener un buen crecimiento [25][26][27][28][29][30]. Los estudios realizados con diferentes microalgas, evidencian la eficiencia de captura de CO 2 , hasta del 80% a 99%, que pueden alcanzarse en condiciones óptimas y tiempos cortos de residencia del gas, pero puede variar según el estado fisiológico [31].…”

Section: Introductionunclassified

Impacto del CO2 sobre la densidad celular en seis cepas de microalgas marinas

Huaynate¹,

Huamán²,

Ávila³

et al. 2015

rev.ion

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ResumenDebido a la gran facilidad con que las microalgas pueden capturar el CO 2 del medio ambiente, resulta interesante evaluar la cantidad y tiempo de ingreso de éste a los cultivos masivos, con la fi nalidad de aumentar la densidad celular. El objetivo del presente estudio fue evaluar los tiempos de inyección del mencionado gas, durante la producción de biomasa que conlleve a una mayor densidad celular, evaluando además, la variación del pH sin alterar la calidad del cultivo. A partir de seis cepas obtenidas del Banco de Germoplasma del Instituto del Mar del Perú, se realizaron cultivos tipo batch de 300L en invernadero, el tiempo de cultivo de la fase exponencial donde se realizaron las pruebas fue de tres días. Los datos se procesaron mediante el análisis del parámetro pendiente de la regresión lineal. Los resultados mostraron que la densidad celular es inversamente proporcional al tiempo de inyección de CO 2 al cultivo. La mayor densidad celular, en las diferentes cepas, se obtuvo a los 5min, excepto para las cepas Chaetoceros gracilis y Nannochloris maculata, las cuales obtienen la mayor densidad a los 10 y 15min, respectivamente. La variación de pH tendió hacia la acidez, en un rango de 8 a 4, sin alterar la densidad celular, por el contrario, los cultivos permanecieron libres de contaminantes. En conclusión, los resultados permiten establecer tiempos adecuados de inyección del CO 2 , los cuales fortalecen la fase de crecimiento exponencial aumentando la densidad poblacional en un 30% sobre lo establecido en esta fase.Palabras clave: microalgas, densidad celular, CO 2 , cultivo masivo. AbstractAs microalgae can capture CO 2 easily from the environment, it is interesting to measure the amount and time control of the entry of this gas into microalgae mass culture, in order to increase cell density. The aim of this study was to evaluate the injection times of CO 2 for biomass production that may lead to a higher cell density, it was also evaluated the pH variation without altering the quality of the crop. The work was made with six strains from the Germplasm Bank of the Instituto del Mar del Perú. There were performed cultures like 300L batch in a greenhouse, the cultivation time of the exponential phase lasted three days. The slope of the regression line parameters was analyzed to process data. The results showed that the cell density is inversely proportional to CO 2 injection time cultivation. The higher cell density 23 Cita: Oscanoa Huaynate AI, Ynga Huamán GA, Chang Ávila IL, Aguilar Samanamud CP. Impacto del CO 2 sobre la densidad celular en seis cepas de microalgas marinas. rev.ion. 2015;28(2):23-32.

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Improving mass transfer in an inclined tubular photobioreactor

Cited by 17 publications

References 10 publications

Investigate the cross‐flow flat‐plate photobioreactor for high‐density culture of microalgae

Investigate the cross‐flow flat‐plate photobioreactor for high‐density culture of microalgae

11 Construction and assessment parameters of photobioreactors

Impacto del CO2 sobre la densidad celular en seis cepas de microalgas marinas

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