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Microalgae Harvest through Fungal Pelletization—Co-Culture of Chlorella vulgaris and Aspergillus niger

Author

Listed:
  • Sarman Oktovianus Gultom

    (Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave, MN 55108, USA)

  • Carlos Zamalloa

    (Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave, MN 55108, USA)

  • Bo Hu

    (Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave, MN 55108, USA)

Abstract

Microalgae harvesting is a labor- and energy-intensive process and new approaches to harvesting microalgae need to be developed in order to decrease the costs. In this study; co-cultivatation of filamentous fungus ( Aspergillus niger ) and microalgae ( Chlorella vulgaris ) to form cell pellets was evaluated under different conditions, including organic carbon source (glucose; glycerol; and sodium acetate) concentration; initial concentration of fungal spores and microalgal cells and light. Results showed that 2 g/L of glucose with a 1:300 ratio of fungi to microalgae provided the best culturing conditions for the process to reach >90% of cell harvest efficiency. The results also showed that an organic carbon source was required to sustain the growth of fungi and form the cell pellets. The microalgae/fungi co-cultures at mixotrophic conditions obtained much higher total biomass than pure cultures of each individual strains; indicating the symbiotic relationship between two strains. This can benefit the microbial biofuel production in terms of cell harvest and biomass production.

Suggested Citation

  • Sarman Oktovianus Gultom & Carlos Zamalloa & Bo Hu, 2014. "Microalgae Harvest through Fungal Pelletization—Co-Culture of Chlorella vulgaris and Aspergillus niger," Energies, MDPI, vol. 7(7), pages 1-13, July.
    • Handle: RePEc:gam:jeners:v:7:y:2014:i:7:p:4417-4429:d:38008
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    Citations

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    Cited by:

    1. Chu, Ruoyu & Li, Shuangxi & Zhu, Liandong & Yin, Zhihong & Hu, Dan & Liu, Chenchen & Mo, Fan, 2021. "A review on co-cultivation of microalgae with filamentous fungi: Efficient harvesting, wastewater treatment and biofuel production," Renewable and Sustainable Energy Reviews, Elsevier, vol. 139(C).
    2. Wang, Junjun & Tian, Qinghua & Zeng, Weimin & Qiu, Guanzhou & Shen, Li, 2023. "Insights about fungus-microalgae symbiotic system in microalgae harvesting and wastewater treatment: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 182(C).
    3. Ogbonna, Christiana N. & Nwoba, Emeka G., 2021. "Bio-based flocculants for sustainable harvesting of microalgae for biofuel production. A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 139(C).
    4. Sirajunnisa, Abdul Razack & Surendhiran, Duraiarasan, 2016. "Algae – A quintessential and positive resource of bioethanol production: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 66(C), pages 248-267.
    5. Zhang, Yuejin & Bao, Keting & Wang, Juan & Zhao, Yongjun & Hu, Changwei, 2017. "Performance of mixed LED light wavelengths on nutrient removal and biogas upgrading by different microalgal-based treatment technologies," Energy, Elsevier, vol. 130(C), pages 392-401.

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