期刊
BIOTECHNOLOGY AND BIOENGINEERING
卷 109, 期 9, 页码 2222-2229出版社
WILEY
DOI: 10.1002/bit.24491
关键词
algae; municipal wastewater; light intensity; biomass accumulation; biodiesel production
资金
- University of Minnesota Initiative for Renewable Energy and the Environment (IREE)
- Metropolitan Council Environmental Services (MCES)
- Xcel Energy
- Legislative-Citizen Commission on Minnesota Resources (LCCMR)
In this research, the effect of light intensity on biomass accumulation, wastewater nutrient removal through algae cultivation, and biodiesel productivity was investigated with algae species Chlorella kessleri and Chlorella protothecoide. The light intensities studied were 0, 15, 30, 60, 120, and 200?mu mol?m-2?s-1. The results showed that light intensity had profound impact on tested responses for both strains, and the dependence of these responses on light intensity varied with different algae strains. For C. kessleri, the optimum light intensity was 120?mu mol?m-2?S-1 for all responses except for COD removal. For C. protothecoide, the optimum light intensity was 30?mu mol?m-2?S-1. The major components of the biodiesel produced from algae biomass were 16-C and 18-C FAME, and the highest biodiesel contents were 24.19% and 19.48% of dried biomass for C. kessleri and C. protothecoide, respectively. Both species were capable of wastewater nutrients removal under all lighting conditions with high removal efficiencies. Biotechnol. Bioeng. 2012;109: 22222229. (c) 2012 Wiley Periodicals, Inc.
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