期刊
BIORESOURCE TECHNOLOGY
卷 257, 期 -, 页码 260-265出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.02.085
关键词
Biodiesel; Chlorella; FTIR; Heterotrophy; Wastewater
资金
- Energimyndigheten, Sweden [Microbiorefine 2013-06259]
- FORMAS
The biomass production and changes in biochemical composition of a locally isolated microalga (Chlorella sp.) were investigated in autotrophic, mixotrophic and heterotrophic conditions, using glucose or glycerol as carbon sources and municipal wastewater as the growth medium. Both standard methods and Multivariate Curve Resolution-Alternating Least Squares (MCR-ALS) analysis of data acquired by Fourier-transform IR (FTIR) spectrometry showed that autotrophic and mixotrophic conditions promoted carbohydrate accumulation, while heterotrophic conditions with glycerol resulted in the highest lipid content and lowest carbohydrate content. Heterotrophic conditions with glycerol as a carbon source also resulted in high oleic acid (18:1) contents and low linolenic acid (18:3) contents, and thus increasing biodiesel quality. The results also show the utility of MCR-ALS for analyzing changes in microalgal biochemical composition.
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