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Promotion of microalgal biomass production and efficient use of CO 2 from flue gas by monoethanolamine
Author(s) -
Sun Zhongliang,
Zhang Dongmei,
Yan Chenghu,
Cong Wei,
Lu Yunming
Publication year - 2015
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.4367
Subject(s) - biomass (ecology) , flue gas , chemistry , productivity , carbon fibers , pulp and paper industry , environmental chemistry , food science , organic chemistry , biology , materials science , ecology , composite number , engineering , economics , composite material , macroeconomics
BACKGROUND Flue gas as carbon source for microalgae culture has been applied to reduce the high cost of production. However, low mass transfer efficiency owing to the low CO 2 partial pressure in flue gas limited its utilization. In this work, monoethanolamine was proposed to enhance CO 2 utilization and microalgal biomass production . RESULTS In abiotic absorption experiments, the total inorganic carbon concentration in the medium increased with the increase of monoethanolamine concentration and the CO 2 absorptivity remained above 60% for a considerable pH range (6.5–10.0). The biomass productivity and lipid productivity of Scenedesmus dimorphus were enhanced with monoethanolamine ranging from 0 to 100 mg L −1 . When 100 mg L −1 monoethanolamine was added, the CO 2 utilization efficiency reached 76.1%, which was much higher than the 44.5% obtained in routine culture. The growth of cells was inhibited with monoethanolamine concentration exceeding 150 mg L −1 . The changes of net photosynthetic activity revealed that the oxygen evolving complex might be injured by the higher concentration of monoethanolamine . CONCLUSIONS These results indicated that the incorporation of monoethanolamine could be a promising solution to the problem of low CO 2 utilization efficiency and low biomass productivity in the microalgae culture system. © 2014 Society of Chemical Industry