Growth Enhancement of Dunaliella salina by Microbubble Induced Airlift Loop Bioreactor (ALB)—The Relation between Mass Transfer and Growth Rate

Ying, Kezhen; Gilmour, D. James; Shi, Yuzhen; Zimmerman, William B.

doi:10.4236/jbnb.2013.42a001

Cited by 31 publications

(28 citation statements)

References 12 publications

(13 reference statements)

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“…This figure shows that the cells entered the exponential phase after about 30 hr and reached the stationary phase at about 100 hr. The specific growth rate calculated on the basis of the cell count was 0.55 day −1 , which was higher than the values reported for autotrophic growth of D. salina (0.12 compared with 0.55 day −1 ). This value was also more than the specific growth rate reported before for mixotrophic cultivation of D. salina (0.33 compared with 0.55 day −1 ) on glycerol …”

Section: Resultsmentioning

confidence: 99%

A novel chemical–biochemical process technology for full exploitation of chicken fat for animal nutrition

Sohrabi

Jazini

Tohidi

et al. 2018

Asia-Pacific J Chem Eng

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Chicken fat, a source of unsaturated fatty acid, is obtained from cooked poultry by-products. A fat molecule consists of a glycerol and three fatty acids. This work aimed to introduce a novel chemical-biochemical process technology for full exploitation of chicken fat building blocks, that is, conversion of fatty acids to fatty acid calcium salts (FACSs) and utilization of glycerol for cultivation of microalgae (Dunaliella salina). FACSs are fed to cows as rumen-protected fat.Response surface methodology was used for optimization of calcium salt production in pilot scale reactor. A pilot-scale helical photobioreactor was used for cultivation of D. salina. The results pointed out that from each 1,000 g of chicken fat, approximately 840 g of FACS and approximately 39 g of D. salina powder can be obtained. The proposed process technology is a potentially economic alternative for current commercial FACS production processes where glycerol in their waste is not exploited.

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Section: Resultsmentioning

confidence: 99%

A novel chemical–biochemical process technology for full exploitation of chicken fat for animal nutrition

Sohrabi

Jazini

Tohidi

et al. 2018

Asia-Pacific J Chem Eng

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“…For finebubble dosing, the area marked as red frame was placed with a Y-junction. or Equation (3) (for NaHCO 3 medium and algal medium) [17]. [Na + ] in Equation (3) particularly means the concentration of Na + obtained from NaHCO 3 .…”

Section: Methodsmentioning

confidence: 99%

Enhanced Mass Transfer in Microbubble Driven Airlift Bioreactor for Microalgal Culture

Ying¹,

Al-Mashhadani²,

Hanotu³

et al. 2013

ENG

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In this study, the effect of microfluidic microbubbles on overall gas-liquid mass transfer (CO 2 dissolution and O 2 removal) was investigated under five different flow rates. The effect of different liquid substrate on CO 2 mass transfer properties was also tested. The results showed that the K L a can be enhanced by either increasing the dosing flowrate or reducing the bubble size; however, increasing the flow rate to achieve a higher K L a would ultimately lower the CO 2 capture efficiency. In order to achieve both higher CO 2 mass transfer rate and capture efficiency, reducing bubble size (e.g. using microbubbles) has been proved more promising than increasing flow rate. Microbubble dosing with 5% CO 2 gas showed improved K L a by 30% -100% across different flow rates, compared to fine-bubble dosing. In the real algal culture medium, there appears to be two distinct stages in terms of K L a, divided by the pH of 8.4.

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“…Se han presentado modelados de la evolución de la biomasa sobre consideraciones geométricas y fluidodinámicas diversas para beneficio del diseño y el escalamiento de las unidades de producción (Sánchez Mirón et al, 2002, Luo et al, 2004, Wu y Merchuk, 2004, Pruvost et al, 2006, Pawar, 2016 y considerando el análisis del aporte de diversos parámetros que afectan el proceso de reproducción celular. Entre éstos se tienen, por su mayor influencia, los inherentes a la magnitud de la energía lumínica captada por la biomasa (Barbosa et al, 2003, García-Malea López et al, 2006, Merchuk et al, 2011, la relación área iluminada a volumen de cultivo (Mirón et al, 1999, Joshi et al, 2001, Xu et al, 2009, la transferencia y el secuestro de CO2 (Kumar y Das, 2012, Ying et al, 2013, Kong y Vigil, 2014, Hosseini et al, 2015 e incluso el estrés celular de origen hidromecánico (Michels et al, 2010, López Rosales et al, 2015, los dos últimos afectados por detalles como el tamaño de burbujas y la velocidad superficial del gas (Vial et al, 2002, Barbosa et al, 2004.…”

Section: Introduccionunclassified

Modelado de la Producción de Biomasa Microalgal en un Fotobiorreactor de Burbujeo Anular y Configuración Variable

et al. 2017

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ResumenSe presenta el modelado de los datos empíricos obtenidos en el cultivo de microalgas marinas (Phaeodactylum tricornutum y Tetraselmis sp.) en un fotobiorreactor de escala piloto de tubos concéntricos verticales con burbujeo en el espacio anular. El reactor empleado permite alternar entre dos configuraciones que involucran diferentes volúmenes y modelos de flujo. Se ha podido concluir acerca del efecto que sobre la producción de biomasa provoca un aumento del volumen de cultivo en desmedro de la captación de energía lumínica. Para considerar el efecto de ensombrecimiento de células a media y alta concentración sobre la velocidad de crecimiento se propone un modelo con afectación simple de la ecuación cinética de reproducción exponencial. Palabras clave: producción de biomasa, microalgas, fotobiorreactor, modelado, ensombrecimiento mutuo Modeling of Microalgae Biomass Production in a Variable Configuration Annular Bubbling Photobioreactor AbstractThe results of the modeling of empirical data relative to marine microalgae cultures (Phaedactylum tricornutum and Tetraselmis sp.) in a pilot photobioreactor of two vertical concentric tubes with bubbling in the annular space, are presented. The geometry of this reactor switches between two configurations involving different culture volume and different hydrodynamics. The effect on biomass productivity that provokes an increasing in volume of culture at the expense of diminishing the capture of light energy has been analyzed. Finally, to consider the influence of shadowing of the cells on the biomass increment at medium and high concentration, a model is proposed with involvement of the exponential growth kinetic equation.

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Growth Enhancement of Dunaliella salina by Microbubble Induced Airlift Loop Bioreactor (ALB)—The Relation between Mass Transfer and Growth Rate

Cited by 31 publications

References 12 publications

A novel chemical–biochemical process technology for full exploitation of chicken fat for animal nutrition

A novel chemical–biochemical process technology for full exploitation of chicken fat for animal nutrition

Enhanced Mass Transfer in Microbubble Driven Airlift Bioreactor for Microalgal Culture

Modelado de la Producción de Biomasa Microalgal en un Fotobiorreactor de Burbujeo Anular y Configuración Variable

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