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Biodegradation of indole at high concentration by persolvent fermentation with the thermophilic fungus Sporotrichum thermophile
Authors:P Katapodis  M Moukouli  P Christakopoulos  
Institution:aBiotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 5 Iroon Polytechniou Str, Zografou Campus, 15700 Athens, Greece
Abstract:Indole and its derivatives form a class of toxic recalcitrant environmental pollulants. Sporotrichum thermophile was grown in a persolvent fermentation system containing a large amount of indole. The medium contained up to 20% by volume soybean oil and up to 2 g L−1 indole. Most of the indole was partitioned in the organic solvent layer. When the organism was grown in the medium containing indole at 1 g L−1, indole was totally consumed after 6 days. Under a fed–batch fermentation process where daily batches of indole (1 g L−1) supplemented the microbial culture for 4 days, the biodegradation level was 3.0 g L−1. These values make this process promising and worthy of further investigation for the microbial degradation of other toxic compounds.
Keywords:Biodegradation  Indole  Persolvent fermentation  Soybean oil  Sporotrichum thermophile
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