Loading…

Bioflocculant production from Solibacillus silvestris W01 and its application in cost-effective harvest of marine microalga Nannochloropsis oceanica by flocculation

► Bioflocculant from Solibacillus silvestris flocculates Nannochloropsis oceanica. ► No metal ion was required by the bioflocculant to flocculate N. oceanica. ► Flocculation induced by the bioflocculant is insensitive to temperature. ► The bioflocculant can be recycled and reused. Microalgae are wid...

Full description

Saved in:
Bibliographic Details
Published in:Bioresource technology 2013-05, Vol.135, p.207-212
Main Authors: Wan, Chun, Zhao, Xin-Qing, Guo, Suo-Lian, Asraful Alam, Md, Bai, Feng-Wu
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:► Bioflocculant from Solibacillus silvestris flocculates Nannochloropsis oceanica. ► No metal ion was required by the bioflocculant to flocculate N. oceanica. ► Flocculation induced by the bioflocculant is insensitive to temperature. ► The bioflocculant can be recycled and reused. Microalgae are widely studied for biofuel production, however, current technologies to harvest microalgae for this purpose are not well developed. In this work, a bacterial strain W01 was isolated from activated sludge and identified as Solibacillus silvestris. Bioflocculant in the culture broth of W01 showed 90% flocculating efficiency on marine microalga Nannochloropsis oceanica, and no metal ion was required for the flocculation process. Chemical analysis of the purified bioflocculant indicated that it is a proteoglycan composed of 75.1% carbohydrate and 24.9% protein (w/w). The bioflocculant exhibits no effect on the growth of microalgal cells and can be reused to for economical harvesting of N. oceanica. This is the first report that strain of S. silvestris can produce bioflocculant for microalgae harvest. The novel bioflocculant produced by W01 has the potential to harvest marine microalgae for cost-effective production of microalgal bioproducts.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2012.10.004