Rhodococcus erythropolis strain S-1, which was isolated from soil, produces a bioflocculant. We have found that alcohols are useful carbon sources for its flocculant production. Ethanol was best for flocculant production and culture time. The bioflocculant produced on ethanol medium flocculated a wide range of suspended soils, alkaline and acid.
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Kurane et al. (1994) studied this question.