U.S. Department of EnergyOffice of Scientific and Technical Information
Yields, photosynthetic efficiencies, and proximate chemical composition of dense cultures of marine microalgae. A subcontract report
Abstract
The yields, photosynthetic efficiencies, and proximate composition of several microalgae were compared in dense cultures grown at light intensities up to 70% sunlight. Yields ranged from 3.4 to 21.7 g dry weight/m/sup 2/ day. The highest yield was obtained with Phaeodactylum; the lowest in Botryococcus cultures. The same species had the highest and lowest efficiencies of utilization of photosynthetically active radiation. In nitrogen-sufficient cells of all but one species, most of the dry weight consisted of protein. Lipid content of all species was 20 to 29%, and carbohydrate content 11 to 23%. Lipid content increased somewhat in N-deficient Phaeodactylum and Isochrysis cells, but decreased in deficient Monallanthus cells. Because the overall dry weight yield was reduced by deficiency, lipid yields did not increase. However, since the carbohydrate content increased to about 65% in N-deficient Dunaliella and Tetraselmis cells, the carbohydrate yield increased. In Phaeodactylum the optimum light intensity was about 40% of full sunlight. Most experimets with this alga included a CUSO/sub 4/ filter to decrease infrared irradiance. When this filter was removed, the yield increased because more red light in the photosynthetically active spectral range was included. These results should prove useful to workers attempting to maximize yields andmore »
- Authors:
- Publication Date:
- Research Org.:
- Scripps Institution of Oceanography, San Diego, CA (USA)
- OSTI Identifier:
- 5632620
- Report Number(s):
- SERI/STR-231-1896
ON: DE83011992
- DOE Contract Number:
- AC02-77CH00178
- Resource Type:
- Technical Report
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 09 BIOMASS FUELS; 59 BASIC BIOLOGICAL SCIENCES; ALGAE; CHEMICAL COMPOSITION; PRODUCTIVITY; PHOTOSYNTHESIS; EFFICIENCY; PHYTOPLANKTON; AQUACULTURE; CARBOHYDRATES; CULTURE MEDIA; EXPERIMENTAL DATA; GROWTH; LIPIDS; NUTRIENTS; OPACITY; PROTEINS; SOLAR RADIATION; AQUATIC ORGANISMS; CHEMICAL REACTIONS; DATA; INFORMATION; NUMERICAL DATA; OPTICAL PROPERTIES; ORGANIC COMPOUNDS; PHOTOCHEMICAL REACTIONS; PHYSICAL PROPERTIES; PLANKTON; PLANTS; RADIATIONS; STELLAR RADIATION; SYNTHESIS; AQUATIC SPECIES PROGRAM; BENCH-SCALE EXPERIMENTS; 140504* - Solar Energy Conversion- Biomass Production & Conversion- (-1989); 550700 - Microbiology
Citation Formats
Thomas, W H, Seibert, D L.R., Alden, M, Eldridge, P, and Neori, A. Yields, photosynthetic efficiencies, and proximate chemical composition of dense cultures of marine microalgae. A subcontract report. United States: N. p., 1983.
Web. doi:10.2172/5632620.
Thomas, W H, Seibert, D L.R., Alden, M, Eldridge, P, & Neori, A. Yields, photosynthetic efficiencies, and proximate chemical composition of dense cultures of marine microalgae. A subcontract report. United States. https://doi.org/10.2172/5632620
Thomas, W H, Seibert, D L.R., Alden, M, Eldridge, P, and Neori, A. 1983.
"Yields, photosynthetic efficiencies, and proximate chemical composition of dense cultures of marine microalgae. A subcontract report". United States. https://doi.org/10.2172/5632620. https://www.osti.gov/servlets/purl/5632620.
@article{osti_5632620,
title = {Yields, photosynthetic efficiencies, and proximate chemical composition of dense cultures of marine microalgae. A subcontract report},
author = {Thomas, W H and Seibert, D L.R. and Alden, M and Eldridge, P and Neori, A},
abstractNote = {The yields, photosynthetic efficiencies, and proximate composition of several microalgae were compared in dense cultures grown at light intensities up to 70% sunlight. Yields ranged from 3.4 to 21.7 g dry weight/m/sup 2/ day. The highest yield was obtained with Phaeodactylum; the lowest in Botryococcus cultures. The same species had the highest and lowest efficiencies of utilization of photosynthetically active radiation. In nitrogen-sufficient cells of all but one species, most of the dry weight consisted of protein. Lipid content of all species was 20 to 29%, and carbohydrate content 11 to 23%. Lipid content increased somewhat in N-deficient Phaeodactylum and Isochrysis cells, but decreased in deficient Monallanthus cells. Because the overall dry weight yield was reduced by deficiency, lipid yields did not increase. However, since the carbohydrate content increased to about 65% in N-deficient Dunaliella and Tetraselmis cells, the carbohydrate yield increased. In Phaeodactylum the optimum light intensity was about 40% of full sunlight. Most experimets with this alga included a CUSO/sub 4/ filter to decrease infrared irradiance. When this filter was removed, the yield increased because more red light in the photosynthetically active spectral range was included. These results should prove useful to workers attempting to maximize yields and efficiencies, but additional studies are needed. 69 references, 27 figures, 18 tables.},
doi = {10.2172/5632620},
url = {https://www.osti.gov/biblio/5632620},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jul 01 00:00:00 EDT 1983},
month = {Fri Jul 01 00:00:00 EDT 1983}
}