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Molecules 2011, 16(3), 2431-2442; doi:10.3390/molecules16032431
Article

Bioflocculant Production by Virgibacillus sp. Rob Isolated from the Bottom Sediment of Algoa Bay in the Eastern Cape, South Africa

1
, 1
, 2
, 3
, 4
, 4
 and 1,*
1 Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Private Bag X1314, Alice 5700, South Africa 2 Division of Microbiology, University of KwaZulu Natal, Durban Westville, South Africa 3 Department of Chemistry, University of Fort Hare, Alice, South Africa 4 South African Environmental Observation Network, SAEON, Elwandle Node, 18 Somerset Street, Grahamstown, 6140, South Africa
* Author to whom correspondence should be addressed.
Received: 21 December 2011 / Revised: 10 March 2011 / Accepted: 11 March 2011 / Published: 14 March 2011
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Abstract

A bioflocculant-producing marine bacterium previously isolated from marine sediment of Algoa Bay was screened for flocculant production. Comparative analysis of 16S rDNA sequence identified the isolate to have 99% similarity to Virgibacillus sp. XQ-1 and it was deposited in the GenBank as Virgibacillus sp. Rob with accession number HQ537127. The bacterium produced biflocculants optimally in glucose (70.4%) and peptone (70.4%) as sole sources of carbon and nitrogen, alkaline pH (12) (74%); and the presence of Fe2+ (74%). Chemical analysis of the bioflocculant revealed it to be a polysaccharide.
Keywords: Virgibacillus sp.; bioflocculant; flocculating activity; polysaccharide Virgibacillus sp.; bioflocculant; flocculating activity; polysaccharide
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Cosa, S.; Mabinya, L.V.; Olaniran, A.O.; Okoh, O.O.; Bernard, K.; Deyzel, S.; Okoh, A.I. Bioflocculant Production by Virgibacillus sp. Rob Isolated from the Bottom Sediment of Algoa Bay in the Eastern Cape, South Africa. Molecules 2011, 16, 2431-2442.

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