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The dark side of algae cultivation [electronic resource] : Characterizing night biomass loss in three photosynthetic algae, <i>Chlorella sorokiniana</i>, <i>Nannochloropsis salina</i> and <i>Picochlorum</i> sp.

Published:
Washington, D.C. : United States. Dept. of Energy, 2015.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description:
pages 470-476 : digital, PDF file
Additional Creators:
Pacific Northwest National Laboratory (U.S.), United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
Night biomass loss in photosynthetic algae is an essential parameter that is often overlooked when modeling or optimizing biomass productivities. Night respiration acts as a tax on daily biomass gains and has not been well characterized in the context of biofuel production. We examined the night biomass loss in three algae strains that may have potential for commercial biomass production (Nannochloropsis salina-CCMP1776, Chlorella sorokiniana-DOE1412, and Picochlorum sp. LANL-WT). Biomass losses were monitored by ash free dry weight (AFDW mg/L-1) and optical density (OD750) on a thermal-gradient incubator. Night biomass loss rates were highly variable (ranging from -0.006 to -0.59 day -1), species-specific, and dependent on both culture growth phase prior to the dark period and night pond temperature. In general, the fraction of biomass lost over a 10 hour dark period, which ranged from ca. 1 to 22% in our experiments, was positively correlated with temperature and declined as the culture transitioned from exponential to linear to stationary phase. Furthermore, the dynamics of biomass loss should be taken into consideration in algae strain selection, are critical in predictive modeling of biomass production based on geographic location and can influence the net productivity of photosynthetic cultures used for bio-based fuels or products.
Report Numbers:
E 1.99:pnnl-sa--108573
pnnl-sa--108573
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Note:
Published through SciTech Connect.
10/28/2015.
"pnnl-sa--108573"
"BM0108010"
Algal Research 12 ISSN 2211-9264 AM
Scott J. Edmundson; Michael H. Huesemann.
Funding Information:
AC05-76RL01830
View MARC record | catkey: 23499990