Cited by 69Algal biology and biofuel productionAquatic Ecosystems and Phytoplankton DynamicsAquaculture Nutrition and Growth

Effects of Nitrogen Forms and Supply Mode on Lipid Production of Microalga Scenedesmus obliquus

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An, Mei, Gao, Li, Zhao, Wen, Chen, Weiguang, Li, Ming·2020·Energies

Abstract

Optimization of the microalgae culture conditions could significantly reduce the production costs of microalgae-derived biodiesel. In the current study, a new process of adding different forms using the multiple small-dose method was employed. The effects of different forms of nitrogen (NaNO3, NH4Cl, and CH4N2O) and their concentrations (0.1, 0.5, 1, and 2 mg L−1) on the growth and lipid production of Scenedesmus obliquus were studied. Algae density and lipid production increased with increasing nitrogen concentration for all different forms of nitrogen except NH4Cl. The Scenedesmus obliquus growth was promoted by adding NaNO3 and CH4N2O, but was inhibited by adding NH4Cl. Adding 2 mg N L−1 of CH4N2O daily yielded the highest cell density (1.7 × 107 cells mL−1) and lipid production (242.4 mg L−1). These conditions can thus maintain the biomass of Scenedesmus obliquus, increase its lipid accumulation, and decrease the costs of biodiesel production.

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Crossref · 10.3390/en13030697

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  • Stress conditions caused by lack of nitrogen or phosphorus can decrease growth rate, biomass accumulation, and final lipid yield.

    “However, stress conditions caused by a lack of nitrogen or phosphorus can decrease the growth rate of microalgae, biomass accumulation and, accordingly, the reduction in the final lipid yield [44–46].”

    From Nitrogen and phosphorus stress as a tool to induce lipid production in microalgae (2023) · cites this paper as [45]

    The Introduction (page not provided) says nitrogen deficiency can reduce biomass production and that growth inhibition under nitrogen-free conditions results in lower overall lipid production. The paper does not say that phosphorus deficiency causes the same reductions; its discussion of phosphorus absorption does not establish that link. (LLM, conf=0.88)

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Authors
An, M., Gao, L., Zhao, W., Chen, W., & Li, M.
Affiliations
  • Northwest A&F University (CN)
  • South East Water (Australia) (AU)
Corresponding author
Li, Ming
Venue
Energies
Publisher
MDPI AG
Published
2020-02-06
Volume
13
Issue
3
Pages
697
ISSN
1996-1073 (ISSN-L)
OpenAlex
W3005214403
Cited by
69
References
39
Citations by year
2026: 8 · 2025: 11 · 2024: 13 · 2023: 9 · 2022: 12 · 2021: 12 · 2020: 4
FWCI
1.83
Type
journal article
Language
en
Open access
Locations
  • Energies (publishedVersion, cc-by)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Fundamental Research Funds for Central Universities (2452018142)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
  • Physical Sciences › Environmental Science › Environmental Chemistry › Aquatic Ecosystems and Phytoplankton Dynamics
  • Life Sciences › Agricultural and Biological Sciences › Aquatic Science › Aquaculture Nutrition and Growth
Keywords
Scenedesmus obliquus, nitrogen source, nitrogen forms, lipid production, microalgae growth, biodiesel feedstock, sodium nitrate, ammonium chloride, urea, nitrogen content

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