Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 5 Issue 2, 2003; Page No.(177-182 )

UTILIZATION OF LIGNIN RELATED PHENOLIC DERIVATIVES BY FLAVOBACI'ERILIM SP.

N. ELANGOVAN, P.S. SUDHAKAR GANDHI AND P.T. KALAICHELVAN

Abstract

The ability of Flavobacterium sp. isolated from the natural population of a paper mill effluent flooded soil was tested for its ability in utilizing various lignin related phenolic compounds either as sole source of carbon or as co-metabolite for its growth. Among the monohydroxy phenols tested p-hydroxy benzoic acid was most favoured by the organism as sole carbon source with 87% utilization. Protocetechuic acid and catechol were the two dihydroxy phenols utilized efficiently by the organism with a percentage utilization of 90% and 70%, respectively, when compared to other dihydroxy phenols. With addition of glucose the utilization of porotocatechuic acid and catechol were slightly reduced. Among different methoxy phenols tested vanillin and vanillic acid were the best preferred with a percentage utilization of 95% and 80%, respectively. Efficient utilization of these lignin related phenolic compounds indicates the positive role of Flavobacterium sp. in treatment of paper mill effluent, rich in lignin content.

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