期刊
BIORESOURCE TECHNOLOGY
卷 145, 期 -, 页码 285-289出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.01.120
关键词
Scenedesmus obliquus; Cell flocculation; Flocculating agent; Polysaccharide; Microalgae harvesting
资金
- National Basic Research Program of China [2011CB200905]
In the present work, the extracellular biopolymers from the self-flocculating microalga Scenedesmus obliquus AS-6-1 were studied. It was revealed that the self-flocculation of the microalgal cells was mediated by cell wall-associated polysaccharides with a molecular weight of 127.9 kDa. Sugar compositions analysis indicated that the monomers consist of glucose, mannose, galatose, rhamnose and fructose with the molar ratio of 8:5:3:2:1. Addition of 0.6 mg/L purified flocculating agent resulted in the fast flocculation of freely suspended cells of S. obliquus and Chlorella vulgaris. The flocculating activity is stable between pH 6 and 8 and at 20-60 degrees C. (C) 2013 Elsevier Ltd. All rights reserved.
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