Harvest of Scenedesmus sp with bioflocculant and reuse of culture medium for subsequent high-density cultures

Title
Harvest of Scenedesmus sp with bioflocculant and reuse of culture medium for subsequent high-density cultures
Author(s)
박용하Dong-Geol Kim[Dong-Geol Kim]Hyun-Joon La[Hyun-Joon La]Chi-Yong Ahn[Chi-Yong Ahn]Hee-Mock Oh[Hee-Mock Oh]
Keywords
BIOPOLYMER; FLOCCULATION; MICROALGAE; BIODIESEL
Issue Date
201102
Publisher
ELSEVIER SCI LTD
Citation
BIORESOURCE TECHNOLOGY, v.102, no.3, pp.3163 - 3168
Abstract
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 CaCl(2) and 0.2 mM FeCl(3) 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.
URI
http://hdl.handle.net/YU.REPOSITORY/25687http://dx.doi.org/10.1016/j.biortech.2010.10.108
ISSN
0960-8524
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생명공학부 > 생명공학부 > Articles
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