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Title 

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

Authors 

D G KimHyun Joon LaChi-Yong AhnY H ParkHee-Mock Oh

Publisher 

Elsevier

Issue Date 

2011

Citation 

Bioresource Technology, vol. 102, no. 3, pp. 3163-3168

Keywords 

BioflocculantFlocculationHarvestReuse of mediumScenedesmus sp.

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 8.5mM CaCl2 and 0.2mM 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.

ISSN 

0960-8524

Link 

http://dx.doi.org/10.1016/j.biortech.2010.10.108

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2017-04-19


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