Potential fuel oils from the microalga <i>Choricystis minor</i>

Sobczuk, Tania Mazzuca; Chisti, Yusuf

doi:10.1002/jctb.2272

Cited by 96 publications

(13 citation statements)

References 33 publications

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“…In relation to the RAF reactor, the highest productivity (0.528 mg L −1 d −1 ) was obtained at 48 h at the 1.8 vvm aeration rate; later, a decay was observed until the end of the experiment, and this was due to a reactivation by agitation, affecting cell growth, generating a cellular increase. The results of lipid productivities were not the expected ones, since they were in the range of 0.2-0.650 mg L −1 d −1 , that is, 40% lower, compared with other studies that used similar conditions in the cultivation process with microalgae, [5,13,26]. This situation would confirm in a certain way what had been supposed previously.…”

Section: Effect Of the Rate Of Aeration On Lipid Productioncontrasting

confidence: 52%

“…A possible explanation for this behavior is that the cells adapted to the conditions of the culture medium to continue growing without resenting the scarcity of nitrogen. That is to say, a stress for nutrients did not occur, maintaining the metabolism acquired in the seedling stage, unlike of what is reported by [13,15,[25][26][27], where nitrogen insufficiency and the phenomenon of nutrient stress were present. In addition, upon reaching the stationary phase and cell growth, microalgae would have greater difficulty in accessing light to perform the process of photosynthesis and consume nitrogen only to maintain their cellular functions and produce storage metabolites [13,28,29].…”

Section: Effect Of the Aeration Rate On Cell Growth And Nitrogen Consmentioning

confidence: 56%

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Effect of Hydrodynamic Conditions of Photobioreactors on Lipids Productivity in Microalgae

Heredia¹,

García²,

Ruiz-Marín³

et al. 2018

Microalgal Biotechnology

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This research presents the effect of hydrodynamic conditions at different rates of aeration (1.4, 1.8, and 2.3 vvm) and the geometry of two photobioreactors with internal lighting on lipid productivity and other parameters of Chlorella vulgaris. A two-step nitrogenreduction cultivation mode was applied for promoting lipid accumulation. The inoculum was cultivated initially at 90 mg L −1 N-NH 4 + , and at the end of the exponential phase, it was fed to 11 L photobioreactor at 20 mg L −1 of N-NH 4 +. The results showed that with similar aeration rates, the hydrodynamic regime in both photobioreactors was different. However, the increase in shear rate and agitation did not cause cell damage or photoinhibition. The maximum cell growth was 12 × 10 6 cells mL −1. The highest consumption of nitrogen was 19% and shear rates were of 120-340 s −1. The highest lipid productivity was reached in bubble column at 1.8 vvm with 0.650 mg•L −1 d −1 .

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Section: Effect Of the Rate Of Aeration On Lipid Productioncontrasting

confidence: 52%

Section: Effect Of the Aeration Rate On Cell Growth And Nitrogen Consmentioning

confidence: 56%

Effect of Hydrodynamic Conditions of Photobioreactors on Lipids Productivity in Microalgae

Heredia¹,

García²,

Ruiz-Marín³

et al. 2018

Microalgal Biotechnology

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“…Microalgae are presently regarded as an important biomass resource for the production of biofuels, animal feeds, health products and pharmaceuticals because of their high productivity and neutrality towards natural environments . Moreover, in recent years, microalgae have been widely regarded as one of the most promising sources for the production of renewable energy . However, the production of microalgae products is still constrained by the lack of economical and efficient microalgae culture methods.…”

Section: Introductionmentioning

confidence: 99%

Effects of organic matters in domestic wastewater on lipid/carbohydrate production and nutrient removal of Chlorella vulgaris cultivated under mixotrophic growth conditions

Peng

Gao

Hang

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: The combination of wastewater treatment and algal biofuel production has received increasing attention in recent years owing to its many advantages. In order to clarify the influence of different organic pollutants such as carbohydrates, volatile fatty acids (VFAs) and proteins in domestic wastewater on the cultivation of Chlorella vulgaris, three simulated domestic sewages containing glucose, sodium acetate (NaAc) and protein respectively were prepared in this study to culture C. vulgaris in mixotrophic way. RESULTS:The biomass productivities of C. vulgaris cultured in wastewaters containing glucose and NaAc were 63.5 and 55.2 mg L −1 day −1 respectively, which were 2.61-and 2.27-fold larger than that achieved in photoautotrophic condition. Owing to the higher biomass productivity, better performance of nutrient removal was also achieved in wastewater containing glucose or NaAc. Different from glucose and NaAc, protein in the wastewater had no significant effect on C. vulgaris growth and nutrient removal. Chlorella vulgaris cultured in NaAc and glucose wastewaters achieved the highest lipid (17.35 mg L −1 day −1 ) and carbohydrate (18.75 mg L −1 day −1 ) productivities respectively, indicating that wastewater containing these two organic substances has certain advantages in microalgal liquid biofuel production. CONCLUSIONS: Organic matters in wastewater have important effects on microalgae growth and the chemical composition of algal cells. Carbohydrates and VFAs in wastewater can significantly promote the growth of C. vulgaris and promote the accumulation of lipid by microalgae. AnalysisThe microalgae concentration was determined using the optical density of the microalgae culture at 680 nm (OD 680 ). According to a previous study, the relationship between the dry biomass J Chem Technol Biotechnol 2019; 94: [3578][3579][3580][3581][3582][3583][3584]

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“…Cultivation of microalgae in continuous systems is quite established and studied for several species (for instance Mazzuca Sobczuk and Chisti 2010;Tang et al 2012;Ruiz et al 2013), but less information is available on species of Nannochloropsis genus, one interesting candidate for these applications thanks to its ability to accumulate lipids (Rodolfi et al 2009;Sforza et al 2012). Some interesting attempts to grow Nannochloropsis in outdoor continuous reactors were carried out and different reactor geometries were tested, analysing both biomass productivity and biochemical composition (Richmond and Cheng-wu 2001;Briassoulis et al 2010;Bellou and Aggelis 2012;Camacho-Rodríguez et al 2014;Kim et al 2014;San Pedro et al 2014;Zhang et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Effect of specific light supply rate on photosynthetic efficiency of Nannochloropsis salina in a continuous flat plate photobioreactor

Sforza

Calvaruso

Meneghesso

et al. 2015

Appl Microbiol Biotechnol

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In this work, Nannochloropsis salina was cultivated in a continuous-flow flat-plate photobioreactor, working at different residence times and irradiations to study the effect of the specific light supply rate on biomass productivity and photosynthetic efficiency. Changes in residence times lead to different steady-state cell concentrations and specific growth rates. We observed that cultures at steady concentration were exposed to different values of light intensity per cell. This specific light supply rate was shown to affect the photosynthetic status of the cells, monitored by fluorescence measurements. High specific light supply rate can lead to saturation and photoinhibition phenomena if the biomass concentration is not optimized for the selected operating conditions. Energy balances were applied to quantify the biomass growth yield and maintenance requirements in N. salina cells.

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Potential fuel oils from the microalga Choricystis minor

Cited by 96 publications

References 33 publications

Effect of Hydrodynamic Conditions of Photobioreactors on Lipids Productivity in Microalgae

Effect of Hydrodynamic Conditions of Photobioreactors on Lipids Productivity in Microalgae

Effects of organic matters in domestic wastewater on lipid/carbohydrate production and nutrient removal of Chlorella vulgaris cultivated under mixotrophic growth conditions

Effect of specific light supply rate on photosynthetic efficiency of Nannochloropsis salina in a continuous flat plate photobioreactor

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