Effects of dilution rate and water reuse on biomass and lipid production of Scenedesmus obliquus in a two-stage novel photobioreactor

Lucas-Salas, L.M.; Castrillo, M.; Martinez, Daiana Gotardo

doi:10.1016/j.biortech.2013.06.007

Cited by 21 publications

(9 citation statements)

References 23 publications

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“…These authors studied the effect of dilution rate in the range 0.2-0.6 in N. gaditana and found an inverse relationship between lipid content and dilution rate, achieving a maximum lipid content of 25% (d.w.) under similar conditions to those described above at the lowest dilution rate tested (0.2 d −1 ). Lucas-Salas et al [11] also obtained the same trend with the strain S. obliquus when studying the effect of dilution rate on lipid content in the range 0.08 to 0.24 d −1 , obtaining the highest value at 0.09 and 0.1 d −1 . The lipid content decreased as dilution rate increased.…”

Section: Influence Of Dilution Rate On the Biochemical Compositionsupporting

confidence: 64%

“…In the present study, when working at dilution rates above 0.3 d −1 , a negative effect on the biomass productivity that was reached is also observed ( Table 5), caused by the decrease in the biomass concentration (Table 4), due to the lower residence time of cells in the PBR and the request of a higher light availability. Lucas-Sala et al [11] found a similar relationship between biomass concentration and dilution rate for the strain Scenedesmus obliquus cultured in 100 L bubble columns illuminated with a maximum PFD of 1000 μmol·s −1 ·m −2 , simulating a solar cycle of 12 h:12 h light:darkness at a constant temperature of 22 ± 2°C and with a 2% CO 2 -enriched air supply. San Pedro et al [10] obtained a maximum biomass productivity of 0.49 g·L −1 ·d −1 at a dilution rate of 0.42 d −1 and 8 mM nitrogen availability in N. gaditana continuous indoor culture at a temperature of 20°C and a maximum irradiance of 950 μmol·s −1 ·m −2 .…”

Section: Influence Of Dilution Rate On Biomass Productivitymentioning

confidence: 66%

“…Points correspond to experimental data whereas lines correspond to data simulated using Eq. (11). Surface response of the variation in vaucheriaxanthin (c), β-carotene (d) and EPA (f) productivity (mg·L −1 ·d −1 ) with average irradiance (I av ) and temperature for continuous N. gaditana culture.…”

Section: B) A)mentioning

confidence: 99%

“…The effect of dilution rate, as a measure of nutrient availability, has been studied by different authors for several strains [10][11][12], [3] with this parameter being found to have a marked effect on biomass productivity. The biochemical composition is also affected by nutrient availability, as demonstrated by Sukenik et al [12].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The influence of culture conditions on biomass and high value product generation by Nannochloropsis gaditana in aquaculture

et al. 2015

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Section: Influence Of Dilution Rate On the Biochemical Compositionsupporting

confidence: 64%

Section: Influence Of Dilution Rate On Biomass Productivitymentioning

confidence: 66%

Section: B) A)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The influence of culture conditions on biomass and high value product generation by Nannochloropsis gaditana in aquaculture

et al. 2015

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“…These disadvantages possibly can be overcome by semi-continuous (Rodolfi et al 2009; Bondioli et al 2012) and continuous (Klok et al 2013; Lucas-Salas et al 2013; Wen et al 2014) cultivations. Despite these operational modes are more complex to operate, they offer several advantages (Klok et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Batch and semi-continuous microalgal TAG production in lab-scale and outdoor photobioreactors

Benvenuti

Bosma

et al. 2016

J Appl Phycol

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Microalgal triglycerides (TAGs) represent a sustainable feedstock for food, chemical and biofuel industries. The operational strategy (batch, semi-continuous, continuous cultivations) has an impact on the TAG productivity. In this study, semi-continuous (i.e. with fixed harvesting frequency) and batch cultivations were compared on TAG production both at lab-scale and in outdoor cultivations. At lab-scale, the semi-continuous TAG productivity was highest for a cycle time of 2 days (SC1; 0.21 g L−1 day−1) and similar to the maximum obtained with the batch (optimal harvest time; 0.23 g L−1 day−1). Although TAG content was lower for SC1 (22 %) than for the batch (35 %), higher biomass productivities were obtained with SC1. Outdoors, semi-continuous cultivations were subjected to a lower degree of stress (i.e. higher amount of nitrogen present in the system relative to the given irradiance) compared to lab-scale. This yielded low and similar TAG contents (10–13 %) in the different semi-continuous runs that were outdone by the batch on both TAG content (15–25 %) and productivity (batch, 0.97–2.46 g m−2 day−1; semi-continuous, 0.35–0.85 g m−2 day−1). The lab-scale experiments showed that semi-continuous strategies, besides leading to similar TAG productivities compared to the batch, could make TAG production cost effective by valorising also non-TAG compounds. However, optimization of outdoor semi-continuous cultivations is still required. For instance, the nitrogen supply and the harvest frequency should be adjusted on the total irradiance. Additionally, future research should focus on recovery metabolism upon nitrogen resupply.

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Pretreatment and kinetics of oil extraction from algae for biodiesel production

Derakhshan

Nasernejad

Dadvar

et al. 2014

Asia-Pacific J Chem Eng

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In this study, extraction of lipid from algal sp. Chlorella vulgaris is investigated based on Bligh and Dyer method employing methanol and chloroform on wet biomass. Optimization methodology was established on comparison of pretreatment methods as well as investigation of ultrasonication and stirrer parameters to enhance cell disruption. It was found that biomass with water/solid proportion (w/s = 5) operating temperature of 50°C both for ultrasonication and shaking, 5 min ultrasonication with further 3 h of stirring with 200 rpm is the best set of parameters for breakdown of cell envelops, and using these parameters, total extraction of 22.07% was obtained. Kinetic study of breakdown was carried out with further full-factorial investigation of extraction (%) vs time and temperature. Using Arrhenius equation, activation energy of about 34.73 kJ/mol was obtained for this algal sp. with R 2 = 97.81%. Further analysis using analysis of variance showed that when using lower temperatures, sudden increase of extraction occurs in longer times, and vice versa, hence emphasizing the interaction thereof. It was also found that temperature plays the vital role among all examined parameters.

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Effects of dilution rate and water reuse on biomass and lipid production of Scenedesmus obliquus in a two-stage novel photobioreactor

Cited by 21 publications

References 23 publications

The influence of culture conditions on biomass and high value product generation by Nannochloropsis gaditana in aquaculture

The influence of culture conditions on biomass and high value product generation by Nannochloropsis gaditana in aquaculture

Batch and semi-continuous microalgal TAG production in lab-scale and outdoor photobioreactors

Pretreatment and kinetics of oil extraction from algae for biodiesel production

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