The genus Bacillus has been well reported for biof
locculant production [1, 4, 6–9] but isolates from the
marine environment are scarce in literature with
respect to bioflocculant production. Marine bacteria
are amongst the most economically and biotechnolog
ically valuable prokaryotes. They are responsible for
the production of about 50% of all discovered bioac
tive secondary metabolites [10]. In our previous study
[11] we reported a polysaccharide bioflocculant pro
duction by Bacillus sp. Gilbert. In the current study we
carried out further studies on effect of different culture
conditions on the bioflocculant production, as well as characterised the purified bioflocculant produced in
detail