Comparison of Synechocystis sp. PCC6803 and Nannochloropsis salina for lipid production using artificial seawater and nutrients from anaerobic digestion effluent

Cai, Ting; Ge, Xinna; Park, Stephen Y.; Li, Yebo

doi:10.1016/j.biortech.2013.06.101

Cited by 84 publications

(27 citation statements)

References 29 publications

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“…5 provides a three-dimensional plot for C16:0, the most abundant fatty acid. Previous studies have reported predominant formation of this fatty acid in Synechocystis [16,37]. In this experiment, high C16:0 content (2.2% DW) was favored by an LI range of 400 to 1500 μmol/m 2 s and pH values from 7.2 to 8.8.…”

Section: Fatty Acid Profile and Anovamentioning

confidence: 71%

Effects of light intensity and carbon dioxide on lipids and fatty acids produced by Synechocystis sp. PCC6803 during continuous flow

et al. 2015

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We studied the effects of light intensity (LI) and CO 2 supply on pH and total lipid production and fatty acids by Synechocystis sp. PCC6803 during continuous-flow operation of a photobioreactor having continuous nutrient supply. The temperature was fixed at 30°C, and the LI pattern mimicked a day/night light cycle from 0 to 1920 μmol/m 2 s. The CO 2 supply varied from 1 to 5% v/v of total air. The total lipid content increased proportionally to LI, reaching a high content of 14% of dry weight (DW) at the highest LI at 3% CO 2 . In contrast, LI had no significant influence on the total fatty acid content, which was 3.4% ± 0.5% DW, measured as fatty acid methyl esters (FAMEs). Palmitic acid (C16:0) was the main fatty acid (52% of FAMEs), but γ-linolenic acid (C18:3 n6 ) and linoleic acid (C18:2) were significant at 20% and 14% of total FAMEs, respectively. Also, α-linolenic acid (C18:3n3), oleic acid (C18:1), and palmitoleic acid (C16:1) represented 5%, 4%, and 4% of the total FAMEs, respectively. In case of C16:0, its highest content was achieved at LI of 400 to 1500 μmol/m 2 s and pH media values from 7.2 to 8.8 (3% CO 2 ). The highest formation of C16:1 and C18:1 (desirable for biodiesel production) occurred with LI up to 600 μmol/m 2 s at pH 9 (3% CO 2 ). Stearic acid (C18:0) and linoleic acid (C18:2) contents did not vary with LI or pH, but α-linolenic acid (C18:3 n3 ) formation occurred with patterns opposite to C18:3 n6 , C16:0, and C16:1. LI of 400 to 1600 μmol/m 2 s and pH range from 7.7 to 8.7 led to the highest values of C18:3 n6 (0.8% DW), but C18:3 n3 was suppressed by these conditions, supporting a desaturation pathway in Synechocystis. These results point to strategies to optimize LI, CO 2 , and pH, to enhance the fatty acid production profile for biofuel production.

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Section: Fatty Acid Profile and Anovamentioning

confidence: 71%

Effects of light intensity and carbon dioxide on lipids and fatty acids produced by Synechocystis sp. PCC6803 during continuous flow

et al. 2015

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“…Microalgae allow an efficient recovery of the micronutrients present in growing medium by concentrating these nutrients in microalgal biomass [163]. Micronutrients applied to the soil may not meet the crop requirements due to physical and chemical problems of the soil.…”

Section: Foliar Applicationsmentioning

confidence: 99%

Microalgal Biostimulants and Biofertilisers in Crop Productions

Ronga¹,

Biazzi²,

et al. 2019

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Microalgae are attracting the interest of agrochemical industries and farmers, due to their biostimulant and biofertiliser properties. Microalgal biostimulants (MBS) and biofertilisers (MBF) might be used in crop production to increase agricultural sustainability. Biostimulants are products derived from organic material that, applied in small quantities, are able to stimulate the growth and development of several crops under both optimal and stressful conditions. Biofertilisers are products containing living microorganisms or natural substances that are able to improve chemical and biological soil properties, stimulating plant growth, and restoring soil fertility. This review is aimed at reporting developments in the processing of MBS and MBF, summarising the biologically-active compounds, and examining the researches supporting the use of MBS and MBF for managing productivity and abiotic stresses in crop productions. Microalgae are used in agriculture in different applications, such as amendment, foliar application, and seed priming. MBS and MBF might be applied as an alternative technique, or used in conjunction with synthetic fertilisers, crop protection products and plant growth regulators, generating multiple benefits, such as enhanced rooting, higher crop yields and quality and tolerance to drought and salt. Worldwide, MBS and MBF remain largely unexploited, such that this study highlights some of the current researches and future development priorities.

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“…Over-applying AD effluent to agricultural fields, however, can result in environmental impacts such as watershed eutrophication. These concerns have made AD effluent an attractive nutrient source for algal cultivation (Cai et al, 2013a;Sheets et al, 2014;Wang et al, 2010). However, no report was found on the use of AD effluent in conjunction with flowback water for the cultivation of marine microalgae.…”

Section: Introductionmentioning

confidence: 98%

Cultivation of marine microalgae using shale gas flowback water and anaerobic digestion effluent as the cultivation medium

Racharaks

2015

Bioresource Technology

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The potential of shale gas flowback water and anaerobic digestion (AD) effluent to reduce the water and nutrient requirements for marine microalgae cultivation was evaluated with the following strains: Nannochloropsis salina, Dunaliella tertiolecta, and Dunaliella salina. N. salina and D. tertiolecta achieved the highest biomass productivity in the medium composed of flowback water and AD effluent (6% v/v). Growth in the above unsterilized medium was found to be comparable to that in sterilized commercial media with similar initial inorganic nitrogen concentrations, salinity, and pH levels. Specific growth rates of 0.293 and 0.349 day(-1) and average biomass productivities of 225 and 275 mg L(-1)day(-1) were obtained for N. salina and D. tertiolecta, respectively. The lipid content and fatty acid profile of both strains in the medium were also comparable to those obtained with commercial nutrients and salts.

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Comparison of Synechocystis sp. PCC6803 and Nannochloropsis salina for lipid production using artificial seawater and nutrients from anaerobic digestion effluent

Cited by 84 publications

References 29 publications

Effects of light intensity and carbon dioxide on lipids and fatty acids produced by Synechocystis sp. PCC6803 during continuous flow

Effects of light intensity and carbon dioxide on lipids and fatty acids produced by Synechocystis sp. PCC6803 during continuous flow

Microalgal Biostimulants and Biofertilisers in Crop Productions

Cultivation of marine microalgae using shale gas flowback water and anaerobic digestion effluent as the cultivation medium

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