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Journal of Applied Phycology

, Volume 27, Issue 5, pp 1813–1822 | Cite as

Anaerobic digestates from vinasse promote growth and lipid enrichment in Neochloris oleoabundans cultures

  • Eugenia J. OlguínEmail author
  • Efraín Dorantes
  • Omar S. Castillo
  • Víctor J. Hernández-Landa
5th Congress of the International Society for Applied Phycology

Abstract

Neochloris oleoabundans (=Ettlia oleoabundans) is a green microalga that has great potential for the production of biodiesel. To achieve economically viable processes for the production of biodiesel from microalgae, the use of wastewater is highly recommended. However, there are no reports on the cultivation of N. oleoabundans utilizing anaerobic digestates of vinasse or stillage, which is a highly polluting wastewater from the alcohol industry. A first group of experiments was conducted, aiming to establish the optimal culture conditions of N. oleoabundans (UTEX 1185) using anaerobic effluents of vinasse (AEV) in bubble columns incubated under controlled conditions. The highest culture density was obtained in a medium containing 6 % of such effluents with a daily addition of sodium bicarbonate (1 g L−1). The total lipid content varied from 17.7 to 38.5 % for a range of 2 to 8 % of AEV with added sodium bicarbonate. A second group of experiments using 6 % AEV + sodium bicarbonate and flat plate photobioreactor-incubated outdoors was performed. An increase of 62 % in cell density compared to the value registered in Bold’s basal medium (BBM) was observed. Furthermore, a high ammonium–nitrogen removal (85.2 %) and a high flocculation efficiency (42 % after 30 min) indicate that dual-purpose systems aimed at producing high densities of lipid-enriched biomass of this green microalga are feasible. The uses of supplemental bicarbonate and organic waste as a source of nutrients are very important factors that contribute to reducing the cost of production.

Keywords

Chlorophyceae Anaerobically digested vinasse Auto-flocculation Biodiesel production Flocculation efficiency Green microalgae and stillage 

Notes

Acknowledgments

The authors acknowledge the financial support from the grant FOMIX VER-2009-C03-127097 provided by the State of Veracruz and the National Council of Science and Technology (CONACYT) and from the grant 152931 provided by the Ministry of Energy (SENER) and CONACYT, México. They also acknowledge the technical support from José Luis Domínguez Zavala.

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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  • Eugenia J. Olguín
    • 1
    Email author
  • Efraín Dorantes
    • 1
  • Omar S. Castillo
    • 1
  • Víctor J. Hernández-Landa
    • 1
  1. 1.Institute of EcologyXalapaMéxico

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