High CO2 partial pressure depresses productivity and bioenergetic growth yield of Chlorella pyrenoidosa culture

Lee, Yuan‐Kun; Tay, Hong-Soon

doi:10.1007/bf00003690

Cited by 43 publications

(14 citation statements)

References 12 publications

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“…Nevertheless, 100% CO 2 adverse to microalgal growth in biofilm. Similar results had been reported in suspended cultivation method due to the acid environment which is detrimental to microalgal cells (Lee & Tay, 1991). Therefore, CO 2 with moderate concentration need to be aerated into the cultivation chamber to maintain enough CO 2 molecule diffused into microalgal biofilm.…”

Section: Effect Of Co 2 Flow Rate On Growth Of C Vulgaris Biofilmsupporting

confidence: 74%

Comparison of Chlorella vulgaris biomass productivity cultivated in biofilm and suspension from the aspect of light transmission and microalgae affinity to carbon dioxide

Huang

Wang

Liu

et al. 2016

Bioresource Technology

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To investigate light transmission and cells affinity to CO, Chlorellavulgaris was attached to microfiltration membrane that laid on the solidified BG11 medium compared to that in suspended cultivation mode in this study. The results showed that C. vulgaris showed a 30.4% higher biomass production (103gm) in attached than in suspend system. The upper layer of biofilm with a thickness of 41.31μm (the corresponding areal density of 40gm) was effectively illuminated under light intensity of 120μmolms and more than 40% of the microalgal cells were in light even the areal density was high to 100gm. While only 2.5% of the cells were effectively illuminated in the suspended cultivation system. Furthermore, microalgae cells in biofilm showed a higher affinity to CO compared with that in suspension, and CO saturation point of microalgae cells in biofilm was 1.5% but 4.5% in suspension.

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Section: Effect Of Co 2 Flow Rate On Growth Of C Vulgaris Biofilmsupporting

confidence: 74%

Comparison of Chlorella vulgaris biomass productivity cultivated in biofilm and suspension from the aspect of light transmission and microalgae affinity to carbon dioxide

Huang

Wang

Liu

et al. 2016

Bioresource Technology

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“…It became obvious that excessive CO 2 concentrations will impede cell growth. Lee and Tay had reported the similar results such that the steady state biomass production rate and bioenergetic growth yield were related inversely to CO 2 in the range of 2-90 kPa (2-89%) of CO 2 in a light-limited context in the cultivation of Chlorella pyrenoidosa [14]. The time course of algal growth and lutein production under autotrophic conditions (supplemental with 10% CO 2 ) is shown in Fig.…”

Section: Lutein Production Under Autotrophic Cultivationmentioning

confidence: 52%

The Comparison of Lutein Production by Scenesdesmus sp. in the Autotrophic and the Mixotrophic Cultivation

Yen¹,

Sun²,

Ma³

2010

Appl Biochem Biotechnol

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The results of this study indicate that an increase in CO(2) percentage to 30% can enhance Scenedesmus sp. growth in autotrophic cultivation to a maximum of 0.85 g/l as compared with 0.6 g/l obtained in the batch with air (after 6 days of cultivation). However, while the CO(2) was higher than 30%, it showed a negative impact on cell growth. A mixotrophic cultivation with 3 g/l of glycerol can achieve 0.38 g l(-1) day(-1) of the maximum biomass productivity compared with that of 0.21 g l(-1) day(-1) in autotrophic cultivation. Nevertheless, the lutein content of the mixotrophic cultivation was 0.08-0.1% lower than 0.2-0.25% obtained in autotrophic cultivation, which led to a lower lutein productivity of 0.36 mg l(-1) day(-1) in the mixotrophic batch compared with 0.44 mg l(-1) day(-1) obtained in the autotrophic batch. The limitation of cell growth in the mixotrophic cultivation would be the contributing factor regarding the lower lutein productivity. The mixotrophic cultivation of repeated batch to remove potential inhibitive metabolic products from glycerol catabolism does not show an obvious improvement on biomass. Conclusively, mixotrophic cultivation achieves higher biomass productivity with lower lutein content than that of autotrophic cultivation, which leads to lower lutein productivity. Therefore, the autotrophic cultivation is preferred in the lutein production.

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“…In order to maintain high biomass productivity, the culture needs to be replenished with concentrated stock medium every day. Also, the CO 2 supply needed to be stopped in the evening to prevent the dissolved CO 2 partial pressure from reaching a growth inhibiting level (Lee & Tay, 1991). These manipulations were laborious, but could be overcome by implementation of process automation.…”

Section: Discussionmentioning

confidence: 99%

Design and performance of an α-type tubular photobioreactor for mass cultivation of microalgae

et al. 1995

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An a-shape tubular photobioreactor was designed and constructed based on knowledge of algal growth physiology using sunlight. The algal culture is lifted 5 m by air to a receiver tank. From the receiver tank, the culture flows down parallel polyvinyl-chloride tubes of 25 m length and 2.5 cm internal diameter, placed at an angle of 25 with the horizontal to reach another set of air riser tubes. Again the culture is lifted 5 m to another receiver tank, then flows down parallel tubes connected to the base of the first set of riser tubes. Thus, the bioreactor system looks like the symbol a. As there is no change in the direction of the liquid flow, high liquid flow rate and Reynolds Number can be achieved at relatively low air flow rate in the riser tubes. Due to the high area-volume ratio of the bioreactor, and equable photosynthetically available radiance and culture temperature, biomass density of exceeding 10 g dry weight L -l and daily output rate of 72 g dry weight m -2 land d-' were achieved.

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High CO2 partial pressure depresses productivity and bioenergetic growth yield of Chlorella pyrenoidosa culture

Cited by 43 publications

References 12 publications

Comparison of Chlorella vulgaris biomass productivity cultivated in biofilm and suspension from the aspect of light transmission and microalgae affinity to carbon dioxide

Comparison of Chlorella vulgaris biomass productivity cultivated in biofilm and suspension from the aspect of light transmission and microalgae affinity to carbon dioxide

The Comparison of Lutein Production by Scenesdesmus sp. in the Autotrophic and the Mixotrophic Cultivation

Design and performance of an α-type tubular photobioreactor for mass cultivation of microalgae

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