Investigation of effective parameters on biomass and lipid productivity of Chlorella vulgaris

Mohammadi, Fahimeh Sadat; Arabian, Daryush; Khalilzadeh, Rassoul

doi:10.18054/pb.2016.118.2.3197

Cited by 6 publications

(6 citation statements)

References 17 publications

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“…The addition of H 2 gas along with elevated CO 2 maintains the cellular redox conditions with abundant proton concentrations that reduce the reactive oxygen species thereby increasing the photosynthetic efficiency as observed in CH condition. The increment in biomass productivity with elevated CO 2 gas has been reported in different studies (Bowes, 1991;Hu and Gao, 2006;Mohammadi, 2016;Sun et al, 2016a). The supplementation of hydrogen along with higher CO 2 also has a governing influence on higher biomass productivity and photosynthetic efficiency where hydrogen could be acting as an energy source as reported by Gaffron (1940).…”

Section: Photosynthetic Efficiency Vs Co 2 Biofixationmentioning

confidence: 77%

Photosynthetic and Lipogenic Response Under Elevated CO2 and H2 Conditions—High Carbon Uptake and Fatty Acids Unsaturation

Butti

Mohan

2018

Front. Energy Res.

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Microalgae are most versatile organisms having ability to grow under diverse conditions and utilize both organic and inorganic carbon sources. Microalgal photosynthesis can be employed to transform carbon dioxide (CO 2 ) into essential bioactives and photofuels. In this study, microalgal growth under modified headspace gas compositions which are CO 2 + H 2 (1:1), CO 2 , H 2 and Air was evaluated to determine the photosynthetic efficiency and bioactives production. A marked enhancement was observed in quantum yield (Fv/Fm: 0.77) and CO 2 biosequestration rate (0.39 g.L −1. d −1 ) under CO 2 + H 2 headspace gas condition as compared to the other experimental variations. The chemoselective functioning of Rubisco under varying gas concentrations was determined, where elevated CO 2 conditions negate the oxygenase activity under a high CO 2 /O 2 ratio which enabled higher CO 2 sequestration. The enhanced CO 2 sequestration and altered redox conditions through H 2 addition under the monophasic operation have also led to a higher average degree of unsaturation (DU) and carbon chain length (CCL) of the fatty acids produced. This study provides an approach to augment photosynthetic efficiency and lipogenesis through non-genetic modifications along with the feasibility to cultivate microalgae in integration with industrial flue gases. Exploiting the true potential of microalgae would provide sustenance from climatic changes and environmental pollution concurrently producing biobased products analogous to the fossil-derived products.

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Section: Photosynthetic Efficiency Vs Co 2 Biofixationmentioning

confidence: 77%

Photosynthetic and Lipogenic Response Under Elevated CO2 and H2 Conditions—High Carbon Uptake and Fatty Acids Unsaturation

Butti

Mohan

2018

Front. Energy Res.

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“…Chlorella vulgaris was cultured at 25–35 °C, and the maximum microalgae biomass and lipid content were obtained at 30 °C. Further increasing temperature to 35 °C caused a 12.4% decrease in growth rate . Microalgal growth rate increased as the light intensity increased up to an optimal light intensity.…”

Section: Microalgal Lipid Composition and Selection Of Species For Edmentioning

confidence: 97%

Edible Oil Production From Microalgae: A Review

Zhao-hui

Wan

et al. 2018

Euro J Lipid Sci & Tech

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Microalgae are considered an interesting candidate for the sustainable production of edible oils. Because microalgae contain abundant polyunsaturated fatty acids (PUFA) and have high photosynthetic rates and high oil productivity, they are superior to terrestrial oleaginous crops for producing edible oils. Microalgae are cultivated in aquatic environments, and thus, oil extraction methods for microalgae must consider the influence of water. This paper provides an overview of the suitability of microalgal lipid compositions and proposes a selection of species for edible oil production. The numerous technologies currently available for pretreatment, wet extraction and the refining of edible oils from microalgae are collated and presented, with a primary focus on the key parameters influencing process performance. Furthermore, the paper presents a proposed solution for a microalgae integrated system for edible oil production, which is a possible future direction to develop an economical and environmentally friendly process for the resource utilization of microalgal biomass. Practical Application: Microalgae might be the most promising source of edible oils, with potential applications in food industrialization, due to its rich oil content and its characteristic fatty acid composition. The review provides a selection criterion of microalgal species to help researchers exploit microalgae to produce superior edible oils for human consumption. Various process parameters and wet extraction methods are discussed that may be conducive to improving process performance and achieving high oil recovery yields. By considering the maximum utilization of microalgal biomass, an integrated system in this review would assist in economical production during further studies. Microalgae are the most promising candidates for edible oil production. Cell disruption, extraction, and refining are important processes for microalgal oils and on this basis, wet extraction and resource utilization can further promote the economic feasibility of microalgal process.

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“…Open microalgae productivity (open system) results in a dry weights of 20–40 g m 2 day −1 biomass and a maximum solar conversion efficiency of 3 to 10%, which is 10 to 50 times greater than the efficiency exhibited by terrestrial plants (Hempel, Petrick & Behrendt, 2012; Chen, Zhao & Qi, 2015; Wen et al, 2016; Mallick et al, 2016; Mohammadi, Arabian & Khalilzadeh, 2016; Tan & Lee, 2016). This productivity increases when evaluations are performed under laboratory conditions (closed system) (Wen et al, 2016), suggesting an interesting advantage to its production on an industrial scale.…”

Section: Introductionmentioning

confidence: 99%

“…This productivity increases when evaluations are performed under laboratory conditions (closed system) (Wen et al, 2016), suggesting an interesting advantage to its production on an industrial scale. However, the high cost for the production of this last type of culture, which involves the use of bioreactors, and its associated production costs (Das et al, 2015; Mohammadi, Arabian & Khalilzadeh, 2016) makes this activity still economically unviable (Guo et al, 2013; Jebali et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…The nutritional source of the culture is the primary influencer of the intracellular synthesis of microalgae (Mohammadi, Arabian & Khalilzadeh, 2016; Bekirogullari et al, 2017), and a deficit or excess of nutrients influences both the lipid contents and the synthesis of other bioactive compounds that ensure the survival of cells in culture (Adams et al, 2013; Zhu, Li & Hiltunen, 2016; Mallick et al, 2016). In addition, abiotic stress due to luminosity, nutritional restriction and thermal changes are also variables that are related to this synthesis (Radmann & Costa, 2008; Baumgartner et al, 2013; Mohammadi, Arabian & Khalilzadeh, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Bioprospection of biocompounds and dietary supplements of microalgae with immunostimulating activity: a comprehensive review

Júnior

Faustino

Cunha

2019

PeerJ

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The objective of this review is to analyze the role of microalgal bioprospecting and the application of microalgae as food supplements and immunostimulants in global and regional aquaculture, highlighting the Brazilian Amazon. This study evaluates the primary advantages of the application of the bioactive compounds of these microorganisms, simultaneously identifying the knowledge gaps that hinder their biotechnological and economic exploitation. The methodology used is comparative and descriptive-analytical, considering the hypothesis of the importance of bioprospecting microalgae, the mechanisms of crop development and its biotechnological and sustainable application. In this context, this review describes the primary applications of microalgae in aquaculture during the last decade (2005–2017). The positive effects of food replacement and/or complementation of microalgae on the diets of organisms, such as their influence on the reproduction rates, growth, and development of fish, mollusks and crustaceans are described and analyzed. In addition, the importance of physiological parameters and their association with the associated gene expression of immune responses in organisms supplemented with microalgae was demonstrated. Complementarily, the existence of technical-scientific gaps in a regional panorama was identified, despite the potential of microalgal cultivation in the Brazilian Amazon. In general, factors preventing the most immediate biotechnological applications in the use of microalgae in the region include the absence of applied research in the area. We conclude that the potential of these microorganisms has been relatively well exploited at the international level but not at the Amazon level. In the latter case, the biotechnological potential still depends on a series of crucial steps that involve the identification of species, the understanding of their functional characteristics and their applicability in the biotechnological area, especially in aquaculture.

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Investigation of effective parameters on biomass and lipid productivity of Chlorella vulgaris

Cited by 6 publications

References 17 publications

Photosynthetic and Lipogenic Response Under Elevated CO2 and H2 Conditions—High Carbon Uptake and Fatty Acids Unsaturation

Photosynthetic and Lipogenic Response Under Elevated CO2 and H2 Conditions—High Carbon Uptake and Fatty Acids Unsaturation

Edible Oil Production From Microalgae: A Review

Bioprospection of biocompounds and dietary supplements of microalgae with immunostimulating activity: a comprehensive review

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