期刊
BIORESOURCE TECHNOLOGY
卷 149, 期 -, 页码 586-589出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.09.106
关键词
Heterotrophic cultivation; Microalgal biofuel; Lipid production; Wastewater treatment
资金
- National Natural Science Fund of China (Key Program) [51138006]
- Science Fund for Creative Re-search Groups [21221004]
- Collaborative Innovation Center for Regional Environmental Quality
Cultivating microalgae heterotrophically could overcome the light dependency, and thus increase the yield of microalgal lipid per unit area. In this study, three newly isolated strains of microalgae (Scenedesmus sp. ZTY2, Scenedesmus sp. ZTY3 and Chlorella sp. ZTY4) from a domestic wastewater treatment plant were heterotrophically cultivated in domestic wastewater with no illumination. During the cultivation, the algal densities of Scenedesmus species and Chlorella species were increased by 203.0% and 60.5% comparing with the initial densities, respectively. After 11-day cultivation, the lipid contents of Scenedesmus sp. ZTY2, Scenedesmus sp. ZTY3 and Chlorella sp. ZTY4 reached 69.1%, 55.3% and 79.2%, respectively. The DOC removal efficiencies of these three strains were 63.4%, 52.9% and 64.4%, and the biomass yield were 1.65, 1.98 and 2.31 mg biomass/mg DOC, respectively. This is the first report about the heterotrophic cultivation of microalgae strains for domestic wastewater treatment and lipid production under dark condition. (C) 2013 Elsevier Ltd. All rights reserved.
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