期刊
BIORESOURCE TECHNOLOGY
卷 102, 期 3, 页码 3163-3168出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2010.10.108
关键词
Bioflocculant; Flocculation; Harvest; Reuse of medium; Scenedesmus sp.
资金
- Korean Ministry of Education, Science and Technology
- National Research Foundation of Korea [16-2008-05-001-00] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The optimal flocculating conditions for harvesting high-density cultures of Scenedesmus sp. were investigated using inorganic coagulants and the bioflocculant produced by Paenibacillus polymyxa AM49. The flocculated medium as nutrients for subsequent algal cultivation was also tested. Consecutive treatment with 8.5 mM CaCl2 and 0.2 mM FeCl3 as coagulants and 1% bioflocculant from the culture broth of P. polymyxa AM49 showed the highest flocculating activity of up to 95% for high density algal cultures. The medium flocculated with the coagulants and bioflocculant showed less than 8% decrease in the growth yield in the subsequent algal cultivation. Furthermore, a 20% or 50% fresh BG11 medium supplement allowed the flocculated medium to maintain a high growth yield in subsequent algal cultivation. These results suggest that the flocculation method presented here is efficient and bio-friendly, and allows the reuse of the flocculated medium, thereby contributing to the economic cultivation and harvest of microalgae. (C) 2010 Elsevier Ltd. All rights reserved.
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