Arthrobacter sp.による原油分解の経日変化

概要

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The degradation experiment of Kuwait crude oil was carried out by using the Arthrobacter sp. strain isolated from the marine environment. From the total weight changes of oil the largest degradation period was found out to be during the first three days. From 6 to 9 days incubation, the amount of aliphatic hydrocarbon components in crude oil decreased satisfactorily, but for polycyclic aromatic polar compounds the quite reverse trend was observed, i. e., increment. Such an experimental result might be considered to be the extracellular production of polar compounds deduced from the metabolism of aliphatic hydrocarbon substrates. For the aromatic hydrocarbons, the ring cleavage was suggested for monocyclic ones, and the bicyclic ones didnt appear to proceed such a reaction path, i. e., only occurrence of degradation for the branched alkyl chains attached to the aromatic ring. The biodegradation percentage of n-alkanes was estimated to be about 87% from the GLC analysis, but only 45% degradation was totally observed through the analysis of weight changes. These results indicate that the aliphatic hydrocarbons other than n-alkanes might be considerably resistant to be degraded by this strain.
公益社団法人日本水産学会の論文