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Application of magnesium sulfate and its nanoparticles for enhanced lipid production by mixotrophic cultivation of algae using biodiesel waste.

Sarma, Saurabh Jyoti; Das, Ratul Kumar; Brar, Satinder Kaur; Le Bihan, Yann; Buelna, Gerardo; Verma, Mausam P.; Soccol, Carlos Ricardo (2014). Application of magnesium sulfate and its nanoparticles for enhanced lipid production by mixotrophic cultivation of algae using biodiesel waste. Energy , vol. 78 . p. 16-22. DOI: 10.1016/j.energy.2014.04.112.

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Résumé

CG (Crude glycerol) is one of the major wastes of biodiesel production process. It can be used as a substrate for lipid production by algae and the produced lipid can be recycled as a feedstock for biodiesel production. In order to avoid substrate inhibition, lipid production media are prepared by diluting the CG with distilled water. However, CG contains only a small amount of Mg (57.41 ± 18 ppm) and its concentration is further decreased to around 0.57 ppm during the dilution process. Apart from having a number of roles in algal physiology, Mg is the central atom of chlorophyll. Therefore, MgSO₄ was evaluated as a Mg source to supplement the CG based media used for lipid production by Chlorella vulgaris. By supplementing the process with 1 g/L of MgSO₄, nearly 185.29 ± 4.53% improvement in lipid production has been achieved. Further, application of MgSO₄ nanoparticles was found to improve the lipid production by 118.23 ± 5.67%. Interestingly, unlike MgSO₄, its nanoparticles were found to enhance the lipid production at the expense of only a small amount of glycerol. Thus, application of MgSO₄ nanoparticles could be a potential strategy for enhanced lipid yield.

Type de document: Article
Mots-clés libres: biodiesel; crude glycerol; fermentation; lipid; magnesium; nanoparticle
Centre: Centre Eau Terre Environnement
Date de dépôt: 11 avr. 2018 17:50
Dernière modification: 20 avr. 2018 20:01
URI: http://espace.inrs.ca/id/eprint/3681

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