Influence of magnesium concentrations on the biomass and biochemical variations in the freshwater algae, Chlorella vulgaris

Salman, Jasim M.; Grmasha, Ruqayah Ali; Stenger‐Kovács, Csilla; Lengyel, Edina; Al-sareji, Osamah J.; AL-Cheban, Ahed M.A.AR.; Meiczinger, Mónika

doi:10.1016/j.heliyon.2023.e13072

Cited by 17 publications

(4 citation statements)

References 51 publications

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“…On the other hand, K and Mg usually play a similar role as they act as enzyme activators. Additionally, K is involved in the synthesis of proteins and carbohydrates, being an osmotic regulator as well [48][49][50]. This reinforces the importance of a balanced supplementation in the growth of microalgae since the lack or excess of any macro-and micronutrients can suppress the metabolic pathway in which it is involved.…”

Section: Heterotrophic Growth Of C Vulgarismentioning

confidence: 74%

Comparison of Different Pretreatment Processes Envisaging the Potential Use of Food Waste as Microalgae Substrate

Marques,

Pereira,

Machado

et al. 2024

Foods

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A significant fraction of the food produced worldwide is currently lost or wasted throughout the supply chain, squandering natural and economic resources. Food waste valorization will be an important necessity in the coming years. This work investigates the ability of food waste to serve as a viable nutritional substrate for the heterotrophic growth of Chlorella vulgaris. The impact of different pretreatments on the elemental composition and microbial contamination of seven retail food waste mixtures was evaluated. Among the pretreatment methods applied to the food waste formulations, autoclaving was able to eliminate all microbial contamination and increase the availability of reducing sugars by 30%. Ohmic heating was also able to eliminate most of the contaminations in the food wastes in shorter time periods than autoclave. However, it has reduced the availability of reducing sugars, making it less preferable for microalgae heterotrophic cultivation. The direct utilization of food waste containing essential nutrients from fruits, vegetables, dairy and bakery products, and meat on the heterotrophic growth of microalgae allowed a biomass concentration of 2.2 × 108 cells·mL−1, being the culture able to consume more than 42% of the reducing sugars present in the substrate, thus demonstrating the economic and environmental potential of these wastes.

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Section: Heterotrophic Growth Of C Vulgarismentioning

confidence: 74%

Comparison of Different Pretreatment Processes Envisaging the Potential Use of Food Waste as Microalgae Substrate

Marques,

Pereira,

Machado

et al. 2024

Foods

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“…One straightforward method to increase biomass productivity involves altering the culture medium conditions or adjusting the supply of certain macroelements. For example, in microalgae, some researchers have evaluated the effect of various carbon sources [105], pH variations [106], the photoperiods [107], as well as trace elements composition for biomass production [108]. Consequently, various approaches have been explored to optimize microalgae biomass enriched in specific biomolecules (Figure 2).…”

Section: Biomassmentioning

confidence: 99%

The Microalgae <em>Chlamydomonas </em>for Bioremediation and Bioproduct Production

Bellido-Pedraza,

Torres,

Llamas

2024

Preprint

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The extensive metabolic diversity of microalgae, coupled with their rapid growth rates and cost-effective production, position these organisms as highly promising resources for a wide range of biotechnological applications. These characteristics allow microalgae to address crucial needs in both the agricultural, medical, and industrial sectors. Microalgae are proving to be val-uable in various fields, including the remediation of diverse wastewater types, the production of biofuels and biofertilizers, and the extraction of various products from their biomass. For decades, the microalga Chlamydomonas has been widely used as a fundamental research model organism in various areas such as photosynthesis, respiration, sulfur and phosphorus metabolism, nitrogen metabolism, and flagella synthesis, among others. However, in recent years, the potential of Chlamydomonas as a biotechnological tool for bioremediation, biofertilization, biomass, and bio-products production has been increasingly recognized. Bioremediation of wastewater using Chlamydomonas presents significant potential for sustainable reduction of contaminants and fa-cilitates resource recovery and valorization of microalgal biomass, offering important economic benefits. Chlamydomonas has also established itself as a platform for the production of a wide va-riety of biotechnologically interesting products, such as different types of biofuels, and high-value-added products. The aim of this review is to achieve a comprehensive understanding of the potential of Chlamydomonas in these aspects, and to explore their interrelationship, which would offer significant environmental and biotechnological advantages.

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“…This is attributed to the good impact of CaCl2 on the content of chlorophyll and carotenoids in microalgae, hence leading to an increase in paramylon productivity. Magnesium plays a crucial role in the synthesis of chlorophyll molecules, enabling the efficient process of photosynthesis and the absorption of light energy [29].…”

Section: E Pigment Contentmentioning

confidence: 99%

Metabolite Compounds of Euglena sp. on Mass Cultivation System under MgCl2 and CaCl2 Salt Stress

Suyono,

Luthfiana,

Raihan

et al. 2024

Int. J. Adv. Sci. Eng. Inf. Technol.

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Euglena sp. is rich in primary and secondary metabolite compounds. This cosmopolitan organism can survive extreme conditions such as salt stress because it can increase cell growth rate and metabolism. This mass cultivation research uses an open pond system that is very vulnerable to contamination, so variations in salinity of MgCl2 and CaCl2 are used as treatments because they minimize contamination. The research examines the correlation of salt types to cell growth rate, biomass, monosaccharide profile, paramylon, pigment, and lipid of Euglena sp. Research methods include preparation, medium making, mass cultivation, and measurement of test parameters. Data were analyzed through One-Way ANOVA followed by DMRT, with a 5% confidence level. Based on the research result, the highest value of biomass and paramylon content and productivity at CaCl2 treatment with consecutive values 0.013 ± 0.001, 0.002 ± 0.000, 9.556 ± 0.070, and 0.149 ± 0.019. Monosaccharides analysis produced in the form of sucrose, glucose, fructose, and arabinose amounted to < 10 ppm. CaCl2 treatment produced the highest sucrose of 6251 ppm. The highest chlorophyll-a and carotenoid pigments are located at CaCl2 treatment, respectively (1.698 ± 0.051)b and (0.500 ± 0.032)b. At the same time, the salt treatment has a significant effect on lipid content. To summarize, almost all metabolite compounds were highest in CaCl2 treatment. This research is expected to contribute to developing the Euglena sp. mass cultivation system as a source of bioenergy and biomaterials.

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Influence of magnesium concentrations on the biomass and biochemical variations in the freshwater algae, Chlorella vulgaris

Cited by 17 publications

References 51 publications

Comparison of Different Pretreatment Processes Envisaging the Potential Use of Food Waste as Microalgae Substrate

Comparison of Different Pretreatment Processes Envisaging the Potential Use of Food Waste as Microalgae Substrate

The Microalgae <em>Chlamydomonas </em>for Bioremediation and Bioproduct Production

Metabolite Compounds of Euglena sp. on Mass Cultivation System under MgCl2 and CaCl2 Salt Stress

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