Enhanced biodiesel production in Neochloris oleoabundans by a semi-continuous process in two stage photobioreactors

Yoon, Se Young; Hong, Min Eui; Chang, Won Seok; Sim, Sang Jun

doi:10.1007/s00449-015-1383-x

Cited by 25 publications

(12 citation statements)

References 24 publications

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“…For instance, the combination of a two-stage system with a fed-batch strategy led to higher lipid productivity in comparison with a fed-batch system [163]. Similarly, the integration of a semi-continuous system with a two-stage strategy could also offer better efficiency in terms of increasing lipid productivity in Neochloris oleoabundans [164].…”

Section: Combined Cultivation Strategiesmentioning

confidence: 99%

Improving ‘Lipid Productivity’ in Microalgae by Bilateral Enhancement of Biomass and Lipid Contents: A Review

Shokravi

Ong

et al. 2020

Sustainability

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Microalgae have received widespread interest owing to their potential in biofuel production. However, economical microalgal biomass production is conditioned by enhancing the lipid accumulation without decreasing growth rate or by increasing both simultaneously. While extensive investigation has been performed on promoting the economic feasibility of microalgal-based biofuel production that aims to increase the productivity of microalgae species, only a handful of them deal with increasing lipid productivity (based on lipid contents and growth rate) in the feedstock production process. The purpose of this review is to provide an overview of the recent advances and novel approaches in promoting lipid productivity (depends on biomass and lipid contents) in feedstock production from strain selection to after-harvesting stages. The current study comprises two parts. In the first part, bilateral improving biomass/lipid production will be investigated in upstream measures, including strain selection, genetic engineering, and cultivation stages. In the second part, the enhancement of lipid productivity will be discussed in the downstream measure included in the harvesting and after-harvesting stages. An integrated approach involving the strategies for increasing lipid productivity in up- and down-stream measures can be a breakthrough approach that would promote the commercialization of market-driven microalgae-derived biofuel production.

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Section: Combined Cultivation Strategiesmentioning

confidence: 99%

Improving ‘Lipid Productivity’ in Microalgae by Bilateral Enhancement of Biomass and Lipid Contents: A Review

Shokravi

Ong

et al. 2020

Sustainability

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“…Furthermore, it has been reported that ABA acts as a signal that enhances tolerance to oxidative and osmotic stress in C. reinhardtii, probably by helping to reduce oxidative damage in cells derived from exposure to stress (Yoshida et al 2003(Yoshida et al , 2004. Several strategies have been used to increase lipid content and TAG accumulation in microalgae, and nitrogen depletion has been an effective way to achieve this (Yoon et al 2015). A two-stage cultivation strategy has been one of the most successful strategies to date for increasing TAG content in microalgal cell cultures (Rodolfi et al 2009, Ho et al 2010, Sun et al 2014.…”

Section: A C Bmentioning

confidence: 99%

The phytohormone abscisic acid increases triacylglycerol content in the green microalga Chlorella saccharophila (Chlorophyta)

Contreras-Pool

Peraza-Echeverría

Kú-González

et al. 2016

ALGAE

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Microalgae are currently a very promising source of biomass and triacylglycerol (TAG) for biofuels. In a previous study, we identified Chlorella saccharophila as a suitable source of oil for biodiesel production because it showed high biomass and lipid content with an appropriate fatty acid methyl esters profile. To improve the TAG accumulation in C. saccharophila, in this study we evaluated the effect of abscisic acid (ABA) addition on cell concentration, lipid content and TAG production in this microalga. First, we evaluated the effects of four ABA concentrations (1, 4, 10, and 20 µM) added at the beginning of a single-stage cultivation strategy, and found that all concentrations tested significantly increased cell concentration and TAG content in C. saccharophila. We then evaluated the addition of 1 µM ABA during the second stage of a two-stage cultivation strategy and compared it with a nitrogen deficiency treatment (ND) and a combination of ND and ABA (ND + ABA). Although ABA alone significantly increased lipid and TAG contents compared with the control, ND showed significantly higher TAG content, and ND + ABA showed the highest TAG content. When comparing the results of both strategies, we found a superior response in terms of TAG accumulation with the addition of 1 µM ABA at the beginning of a single-stage cultivation system. This strategy is a simple and effective way to improve the TAG content in C. saccharophila and probably other microalgae as a feedstock for biodiesel production.

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“…In Chlorella pyrenoidosa, under N-and P-deplete conditions, the biomass increased by as much as 112% compared to an initial cell density [43]. In Neochloris oleoabundans, under N-deplete conditions, the biomass increased by as much as 127% compared to an initial cell density [44].…”

Section: Discussionmentioning

confidence: 98%

Microalgal-Based Carbon Sequestration by Converting LNG-Fired Waste CO2 into Red Gold Astaxanthin: The Potential Applicability

et al. 2019

Self Cite

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The combinatorial approach of anthropogenic activities and CO2 sequestration is becoming a global research trend to alleviate the average global temperature. Although microalgae have been widely used to capture CO2 from industrial flue gas, the application of bioproducts was limited to bioenergy due to the controversy over the quality and safety of the products in the food and feed industry. Herein, the waste CO2 emitted from large point sources was directly captured using astaxanthin-hyperproducing microalgae Haematococcus pluvialis. Astaxanthin production was successfully carried out using the hypochlorous acid water-based axenic culture process under highly contamination-prone outdoor conditions. Consequently, after 36 days of autotrophic induction, the productivity of biomass and astaxanthin of H. pluvialis (the mutant) reached 0.127 g L−1 day−1 and 5.47 mg L−1 day−1 under high summer temperatures, respectively, which was 38% and 48% higher than that of wild type cell. After grinding the wet astaxanthin-enriched biomass, the extract was successfully approved by compliance validation testing from Korea Food and Drug Administration. The assorted feed improved an immune system of the poultry without causing any side effects. The flue gas-based bioproducts could certainly be used for health functional food for animals in the future.

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Enhanced biodiesel production in Neochloris oleoabundans by a semi-continuous process in two stage photobioreactors

Cited by 25 publications

References 24 publications

Improving ‘Lipid Productivity’ in Microalgae by Bilateral Enhancement of Biomass and Lipid Contents: A Review

Improving ‘Lipid Productivity’ in Microalgae by Bilateral Enhancement of Biomass and Lipid Contents: A Review

The phytohormone abscisic acid increases triacylglycerol content in the green microalga Chlorella saccharophila (Chlorophyta)

Microalgal-Based Carbon Sequestration by Converting LNG-Fired Waste CO2 into Red Gold Astaxanthin: The Potential Applicability

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