Lipid accumulation and CO2 utilization of Nannochloropsis oculata in response to CO2 aeration

Chiu, Sheng Yi; Kao, Chien Ya; Tsai, Ming Ta; Ong, Seow Chin; Chen, Chiun-Hsun; Lin, Chih‐Sheng

doi:10.1016/j.biortech.2008.06.061

Cited by 701 publications

(273 citation statements)

References 28 publications

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“…The cells in early stationary phase were transferred to phase-2, where cells were exposed to various concentration combinations of nitrogen and salinity. 6 9 At first, seed culture was grown in 100 mL of f/2 medium using 250 mL flask in shaking incubator under light intensity of 80-100 µE m -2 s -1 at 25 °C. When stationary phase was reached, the cells were shifted to glass bubblecolumn photo bioreactor.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Lipid Production of Dunaliella tertiolecta by Manipulating the Interactive Effect of Salinity and Nitrogen

Rizwan

Mujtaba

Rashid

et al. 2017

Chem.Biochem.Eng.Q.

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Low lipid yield is a major bottleneck towards the scale-up application of microalgae for biodiesel production. The focus of this study was to improve the lipid production of Dunaliella tertiolecta (a marine microalga) by altering the concentration of salinity and nitrogen (as nutrients). The unique aspect of this study was to investigate the interactive effect of nitrogen and salinity on lipid production and their correlation with biomass yield and nitrogen uptake. In this experiment, microalgae were grown under various combinations of salinity and nitrogen. At first, lipid production was observed under varied nitrogen concentration (0-75 mg L -1 as NaNO 3 ) and fixed salinity, 37.7 Practical Salinity Unit (PSU). The maximum cell growth rate of 288.4 mg L -1 d -1 and lipid production of 29.3 % were achieved at 75 mg L -1 of NaNO 3 . Now, this concentration of nitrogen was fixed and the effects of salinity concentrations were observed. The lipid production increased to 34 %, and cell growth rate decreased to 201.3 mg L -1 d -1 at 3.77 PSU of salinity. However, further reduction of the nitrogen concentration down to 18.75 mg L -1 of NaNO 3 increased the lipid production to 42 % and decreased biomass to 0.64 g L -1 . It was also found that lipid production was linearly correlated with nitrogen uptake. Microalgae cells consumed all of the nitrogen in the first 24 hours of acclimation; however, lipid yield did not change much over time.

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Section: Introductionmentioning

confidence: 99%

Enhancing Lipid Production of Dunaliella tertiolecta by Manipulating the Interactive Effect of Salinity and Nitrogen

Rizwan

Mujtaba

Rashid

et al. 2017

Chem.Biochem.Eng.Q.

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“…The productivity of the biomass Table 1. Compositions of microalgae based on dry matter (Um and Kim, 2009;Sydney et al 2010;Singh et al, 2012 (Chen et al, 2009), (d) tubular photobioreactor (Carvalho et al, 2006), (e) plastic bag photobioreactor (Richmond, 2008), (f) air-lift loop reactor (Barbosa et al, 2003) and (g) flat plate photobioreactor (Carvalho et al, 2006).…”

Section: Open Systemmentioning

confidence: 99%

A Review: Microalgae and Their Applications in CO2 Capture and Renewable Energy

Klinthong

Yang

Huang

et al. 2015

Aerosol Air Qual. Res.

209

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Fossil fuels, which are recognized as unsustainable sources of energy, are continuously consumed and decreased with increasing fuel demands. Microalgae have great potential as renewable fuel sources because they possess rapid growth rate and the ability to store high-quality lipids and carbohydrates inside their cells for biofuel production. Microalgae can be cultivated on opened or closed systems and require nutrients and CO 2 that may be supplied from wastewater and fossil fuel combustion. In addition, CO 2 capture via photosynthesis to directly fix carbon into microalgae has also attracted the attention of researchers. The conversion of CO 2 into chemical and fuel (energy) products without pollution via this approach is a promising way to not only reduce CO 2 emissions but also generate more economic value. The harvested microalgal biomass can be converted into biofuel products, such as biohydrogen, biodiesel, biomethanol, bioethanol, biobutanol and biohydrocarbons. Thus, microalgal cultivation can contribute to CO 2 fixation and can be a source of biofuels. This article reviews the literature on microalgae that were cultivated using captured CO 2 , technologies related to the production of biofuels from microalgae and the possible commercialization of microalgae-based biofuels to demonstrate the potential of microalgae. In this respect, a number of relevant topics are addressed: the nature of microalgae (e.g., species and composition); CO 2 capture via microalgae; the techniques for microalgal cultivation, harvesting and pretreatment; and the techniques for lipid extraction and biofuel production. The strategies for biofuel commercialization are proposed as well.

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“…The lipid fraction, LF, is defined as the mass of lipids divided by the lysed mass, and the useful lipid fraction, ULF, is defined as mass of useful lipids divided by the mass of the total separated lipids. The terms "separated lipids" and "separated useful lipids" are used explicitly to differentiate the associated productivities, P SL and P SUL , from the term "lipid productivity," which has been used in the literature to characterize the rate at which algae accumulate lipids within the growth media [1,41,104,105,107]. The separated lipid…”

Section: Productivity Nomenclaturementioning

confidence: 99%

A Framework to Report the Production of Renewable Diesel from Algae

et al. 2010

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Recently, algae have received significant interest as a potential feedstock for renewable diesel (such as biodiesel), and many researchers have attempted to quantify this potential. Some of these attempts are less useful because they have not incorporated specific values of algal lipid content, have not included processing inefficiencies, or omitted processing steps required for renewable diesel production. Furthermore, the associated energy, materials, and costs requirements are sometimes omitted. The accuracy and applicability of these estimates can be improved by using data that are more specific, including all relevant information for renewable diesel production, and by presenting information with more relevant metrics. To determine whether algae are a viable source for renewable diesel, three questions that must be answered are (1) how much renewable diesel can be produced from algae, (2) what is the financial cost of production, and (3) what is the energy ratio of production? To help accurately answer these questions, we propose an analytical framework and associated nomenclature system for characterizing renewable diesel production from algae. The three production pathways discussed in this study are the transesterification of extracted algal lipids, thermochemical conversion of algal biomass, and conversion of secreted algal oils. The nomenclature system is initially presented from a top-level perspective that is applicable to all production pathways for renewable diesel from algae. Then, the nomenclature is expanded to characterize the production of renewable diesel (specifically, biodiesel) from extracted algal lipids in detail (cf. Appendix 2). The analytical framework uses the presented nomenclature system and includes three main principles: using appropriate reporting metrics, using symbolic notation to represent unknown values, and presenting results that are specific to algal species, growth conditions, and product composition.

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Lipid accumulation and CO2 utilization of Nannochloropsis oculata in response to CO2 aeration

Cited by 701 publications

References 28 publications

Enhancing Lipid Production of Dunaliella tertiolecta by Manipulating the Interactive Effect of Salinity and Nitrogen

Enhancing Lipid Production of Dunaliella tertiolecta by Manipulating the Interactive Effect of Salinity and Nitrogen

A Review: Microalgae and Their Applications in CO2 Capture and Renewable Energy

A Framework to Report the Production of Renewable Diesel from Algae

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